History of psychology
Encyclopedia
The history of psychology
Psychology
Psychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...

as a scholarly study of the mind and behavior dates back to the Ancient Greeks. There is also evidence of psychological thought in ancient Egypt. Psychology was a branch of philosophy
Philosophy
Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

 until the 1870s, when psychology developed as an independent scientific discipline in Germany and the United States. Psychology borders on various other fields including physiology
Physiology
Physiology is the science of the function of living systems. This includes how organisms, organ systems, organs, cells, and bio-molecules carry out the chemical or physical functions that exist in a living system. The highest honor awarded in physiology is the Nobel Prize in Physiology or...

, neuroscience
Neuroscience
Neuroscience is the scientific study of the nervous system. Traditionally, neuroscience has been seen as a branch of biology. However, it is currently an interdisciplinary science that collaborates with other fields such as chemistry, computer science, engineering, linguistics, mathematics,...

, artificial intelligence
Artificial intelligence
Artificial intelligence is the intelligence of machines and the branch of computer science that aims to create it. AI textbooks define the field as "the study and design of intelligent agents" where an intelligent agent is a system that perceives its environment and takes actions that maximize its...

, sociology
Sociology
Sociology is the study of society. It is a social science—a term with which it is sometimes synonymous—which uses various methods of empirical investigation and critical analysis to develop a body of knowledge about human social activity...

, anthropology
Anthropology
Anthropology is the study of humanity. It has origins in the humanities, the natural sciences, and the social sciences. The term "anthropology" is from the Greek anthrōpos , "man", understood to mean mankind or humanity, and -logia , "discourse" or "study", and was first used in 1501 by German...

, as well as philosophy and other components of the humanities
Humanities
The humanities are academic disciplines that study the human condition, using methods that are primarily analytical, critical, or speculative, as distinguished from the mainly empirical approaches of the natural sciences....

.

Overview

Nowadays, psychology is defined as "the study of behavior and mental processes". Human behaviour is what is mostly researched in modern psychology. Why do we humans react in a certain way? Psychology is a way to express and to explain, the science of behaviour.
Philosophical interest in the mind and behavior dates back to the ancient civilizations of Egypt
Ancient Egypt
Ancient Egypt was an ancient civilization of Northeastern Africa, concentrated along the lower reaches of the Nile River in what is now the modern country of Egypt. Egyptian civilization coalesced around 3150 BC with the political unification of Upper and Lower Egypt under the first pharaoh...

, Greece
Ancient Greece
Ancient Greece is a civilization belonging to a period of Greek history that lasted from the Archaic period of the 8th to 6th centuries BC to the end of antiquity. Immediately following this period was the beginning of the Early Middle Ages and the Byzantine era. Included in Ancient Greece is the...

, China and India
History of India
The history of India begins with evidence of human activity of Homo sapiens as long as 75,000 years ago, or with earlier hominids including Homo erectus from about 500,000 years ago. The Indus Valley Civilization, which spread and flourished in the northwestern part of the Indian subcontinent from...

. Predating Sigmund Freud
Sigmund Freud
Sigmund Freud , born Sigismund Schlomo Freud , was an Austrian neurologist who founded the discipline of psychoanalysis...

 and Carl Jung
Carl Jung
Carl Gustav Jung was a Swiss psychiatrist and the founder of Analytical Psychology. Jung is considered the first modern psychiatrist to view the human psyche as "by nature religious" and make it the focus of exploration. Jung is one of the best known researchers in the field of dream analysis and...

 by nearly 1000 years, psychotherapy was performed by Islamic physicians
Islamic medicine
In the history of medicine, Islamic medicine, Arabic medicine or Arabian medicine refers to medicine developed in the Islamic Golden Age, and written in Arabic, the lingua franca of Islamic civilization....

 on those with mental illness in psychiatric hospitals built as early as the 8th century in Fez, Morocco.

Psychology as a self-conscious field of experimental study began in 1879, when Wilhelm Wundt
Wilhelm Wundt
Wilhelm Maximilian Wundt was a German physician, psychologist, physiologist, philosopher, and professor, known today as one of the founding figures of modern psychology. He is widely regarded as the "father of experimental psychology"...

 founded the first laboratory dedicated exclusively to psychological research in Leipzig
Leipzig
Leipzig Leipzig has always been a trade city, situated during the time of the Holy Roman Empire at the intersection of the Via Regia and Via Imperii, two important trade routes. At one time, Leipzig was one of the major European centres of learning and culture in fields such as music and publishing...

. Wundt was also the first person to refer to himself as a psychologist and wrote the first textbook on psychology: Principles of Physiological Psychology. Other important early contributors to the field include Hermann Ebbinghaus
Hermann Ebbinghaus
Hermann Ebbinghaus was a German psychologist who pioneered the experimental study of memory, and is known for his discovery of the forgetting curve and the spacing effect. He was also the first person to describe the learning curve...

 (a pioneer in the study of memory
Memory
In psychology, memory is an organism's ability to store, retain, and recall information and experiences. Traditional studies of memory began in the fields of philosophy, including techniques of artificially enhancing memory....

), William James
William James
William James was a pioneering American psychologist and philosopher who was trained as a physician. He wrote influential books on the young science of psychology, educational psychology, psychology of religious experience and mysticism, and on the philosophy of pragmatism...

 (the American father of pragmatism
Pragmatism
Pragmatism is a philosophical tradition centered on the linking of practice and theory. It describes a process where theory is extracted from practice, and applied back to practice to form what is called intelligent practice...

), and Ivan Pavlov
Ivan Pavlov
Ivan Petrovich Pavlov was a famous Russian physiologist. Although he made significant contributions to psychology, he was not in fact a psychologist himself but was a mathematician and actually had strong distaste for the field....

 (who developed the procedures associated with classical conditioning
Classical conditioning
Classical conditioning is a form of conditioning that was first demonstrated by Ivan Pavlov...

).

Soon after the development of experimental psychology, various kinds of applied psychology appeared. G. Stanley Hall
G. Stanley Hall
Granville Stanley Hall was a pioneering American psychologist and educator. His interests focused on childhood development and evolutionary theory...

 brought scientific pedagogy to the United States from Germany in the early 1880s. John Dewey
John Dewey
John Dewey was an American philosopher, psychologist and educational reformer whose ideas have been influential in education and social reform. Dewey was an important early developer of the philosophy of pragmatism and one of the founders of functional psychology...

's educational theory of the 1890s was another example. Also in the 1890s, Hugo Münsterberg
Hugo Münsterberg
Hugo Münsterberg was a German-American psychologist. He was one of the pioneers in applied psychology, extending his research and theories to Industrial/Organizational , legal, medical, clinical, educational and business settings. Münsterberg encountered immense turmoil with the outbreak of the...

 began writing about the application of psychology to industry, law, and other fields. Lightner Witmer
Lightner Witmer
Lightner Witmer Lightner Witmer is an American psychologist who is credited with the introduction of the term "Clinical Psychology." Witmer also founded the world's first "Psychological Clinic" in the United States at the University of Pennsylvania in 1896.Witmer contributed greatly to numerous...

 established the first psychological clinic in the 1890s. James McKeen Cattell
James McKeen Cattell
James McKeen Cattell , American psychologist, was the first professor of psychology in the United States at the University of Pennsylvania and long-time editor and publisher of scientific journals and publications, most notably the journal Science...

 adapted Francis Galton
Francis Galton
Sir Francis Galton /ˈfrɑːnsɪs ˈgɔːltn̩/ FRS , cousin of Douglas Strutt Galton, half-cousin of Charles Darwin, was an English Victorian polymath: anthropologist, eugenicist, tropical explorer, geographer, inventor, meteorologist, proto-geneticist, psychometrician, and statistician...

's anthropometric methods to generate the first program of mental testing in the 1890s. In Vienna, meanwhile, the psychiatrist Sigmund Freud
Sigmund Freud
Sigmund Freud , born Sigismund Schlomo Freud , was an Austrian neurologist who founded the discipline of psychoanalysis...

 developed an independent approach to the study of the mind called psychoanalysis
Psychoanalysis
Psychoanalysis is a psychological theory developed in the late 19th and early 20th centuries by Austrian neurologist Sigmund Freud. Psychoanalysis has expanded, been criticized and developed in different directions, mostly by some of Freud's former students, such as Alfred Adler and Carl Gustav...

, which has been widely influential.

The 20th century saw a reaction to Edward Titchener's critique of Wundt's empiricism. This contributed to the formulation of behaviorism
Behaviorism
Behaviorism , also called the learning perspective , is a philosophy of psychology based on the proposition that all things that organisms do—including acting, thinking, and feeling—can and should be regarded as behaviors, and that psychological disorders are best treated by altering behavior...

 by John B. Watson
John B. Watson
John Broadus Watson was an American psychologist who established the psychological school of behaviorism. Watson promoted a change in psychology through his address Psychology as the Behaviorist Views it which was given at Columbia University in 1913...

, which was popularized by B. F. Skinner
B. F. Skinner
Burrhus Frederic Skinner was an American behaviorist, author, inventor, baseball enthusiast, social philosopher and poet...

. Behaviorism proposed limiting psychological study to that of overt behavior, because that could be quantified and easily measured. Behaviorists considered knowledge of the "mind
Mind
The concept of mind is understood in many different ways by many different traditions, ranging from panpsychism and animism to traditional and organized religious views, as well as secular and materialist philosophies. Most agree that minds are constituted by conscious experience and intelligent...

" too metaphysical
Metaphysics
Metaphysics is a branch of philosophy concerned with explaining the fundamental nature of being and the world, although the term is not easily defined. Traditionally, metaphysics attempts to answer two basic questions in the broadest possible terms:...

 to achieve scientifically. The final decades of the 20th century saw the decline of behaviorism and the rise of cognitive science
Cognitive science
Cognitive science is the interdisciplinary scientific study of mind and its processes. It examines what cognition is, what it does and how it works. It includes research on how information is processed , represented, and transformed in behaviour, nervous system or machine...

, an interdisciplinary approach to studying the human mind. Cognitive science again considers the "mind" as a subject for investigation, using the tools of evolutionary psychology
Evolutionary psychology
Evolutionary psychology is an approach in the social and natural sciences that examines psychological traits such as memory, perception, and language from a modern evolutionary perspective. It seeks to identify which human psychological traits are evolved adaptations, that is, the functional...

, linguistics
Linguistics
Linguistics is the scientific study of human language. Linguistics can be broadly broken into three categories or subfields of study: language form, language meaning, and language in context....

, computer science
Computer science
Computer science or computing science is the study of the theoretical foundations of information and computation and of practical techniques for their implementation and application in computer systems...

, philosophy
Philosophy
Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

, behaviorism
Behaviorism
Behaviorism , also called the learning perspective , is a philosophy of psychology based on the proposition that all things that organisms do—including acting, thinking, and feeling—can and should be regarded as behaviors, and that psychological disorders are best treated by altering behavior...

, and neurobiology. This form of investigation has proposed that a wide understanding of the human mind is possible, and that such an understanding may be applied to other research domains, such as artificial intelligence
Artificial intelligence
Artificial intelligence is the intelligence of machines and the branch of computer science that aims to create it. AI textbooks define the field as "the study and design of intelligent agents" where an intelligent agent is a system that perceives its environment and takes actions that maximize its...

.

Early psychological thought

Many cultures throughout history have speculated on the nature of the mind, soul, spirit, etc. For instance, in Ancient Egypt, the Edwin Smith Papyrus
Edwin Smith papyrus
The Edwin Smith Papyrus is an Ancient Egyptian medical text and the oldest known surgical treatise on trauma. It dates to Dynasties 16-17 of the Second Intermediate Period in Ancient Egypt, ca. 1500 BCE. The Edwin Smith papyrus is unique among the four principal medical papyri in existencethat...

 contains an early description of the brain, and some speculations on its functions (though in a medical/surgical context). Though other medical documents of ancient times were full of incantations and applications meant to turn away disease-causing demons and other superstition, the Edwin Smith Papyrus gives remedies to almost 50 conditions and only 1 contains incantations to ward off evil. It has been praised as being similar to what is today considered common knowledge, but must be recognized as having originated in a very different context.

Ancient Greek philosophers, from Thales
Thales
Thales of Miletus was a pre-Socratic Greek philosopher from Miletus in Asia Minor, and one of the Seven Sages of Greece. Many, most notably Aristotle, regard him as the first philosopher in the Greek tradition...

 (fl.
Floruit
Floruit , abbreviated fl. , is a Latin verb meaning "flourished", denoting the period of time during which something was active...

 550 bc) through even to the Roman period, developed an elaborate theory of what they termed the psuchẽ (from which the first half of "psychology" is derived), as well as other "psychological" terms – nous, thumos, logistikon, etc. (see e.g., Everson, 1991; Green & Groff, 2003). The most influential of these are the accounts of Plato
Plato
Plato , was a Classical Greek philosopher, mathematician, student of Socrates, writer of philosophical dialogues, and founder of the Academy in Athens, the first institution of higher learning in the Western world. Along with his mentor, Socrates, and his student, Aristotle, Plato helped to lay the...

 (especially in the Republic
Republic
A republic is a form of government in which the people, or some significant portion of them, have supreme control over the government and where offices of state are elected or chosen by elected people. In modern times, a common simplified definition of a republic is a government where the head of...

– see, e.g., Robinson, 1995), Pythagoras
Pythagoras
Pythagoras of Samos was an Ionian Greek philosopher, mathematician, and founder of the religious movement called Pythagoreanism. Most of the information about Pythagoras was written down centuries after he lived, so very little reliable information is known about him...

 and of Aristotle
Aristotle
Aristotle was a Greek philosopher and polymath, a student of Plato and teacher of Alexander the Great. His writings cover many subjects, including physics, metaphysics, poetry, theater, music, logic, rhetoric, linguistics, politics, government, ethics, biology, and zoology...

 (esp. Peri Psyches, better known under its Latin title, De Anima – see, e.g., Durrant, 1993; Nussbaum & Rorty, 1992). Hellenistic philosophers (viz., the Stoics and Epicurians) diverged from the Classical Greek tradition in several important ways, especially in their concern with questions of the physiological basis of the mind (see e.g., Annas, 1992). The Roman physician Galen
Galen
Aelius Galenus or Claudius Galenus , better known as Galen of Pergamon , was a prominent Roman physician, surgeon and philosopher...

 addressed these issues most elaborately and influentially of all. The Greek tradition influenced some Christian and Islamic thought on the topic.

In the Judeo-Christian
Judeo-Christian
Judeo-Christian is a term used in the United States since the 1940s to refer to standards of ethics said to be held in common by Judaism and Christianity, for example the Ten Commandments...

 tradition, the Manual of Discipline (from the Dead Sea Scrolls
Dead Sea scrolls
The Dead Sea Scrolls are a collection of 972 texts from the Hebrew Bible and extra-biblical documents found between 1947 and 1956 on the northwest shore of the Dead Sea, from which they derive their name...

, ca. 21 BC–61 AD) notes the division of human nature into two temperaments.

In Asia, China had a long history of administering tests of ability as part of its education system. In the 6th century AD, Lin Xie carried out an early experiment, in which he asked people to draw a square with one hand and at the same time draw a circle with the other (ostensibly to test people's vulnerability to distraction). Some have claimed that this is the first psychology experiment, and, therefore, the beginnings of psychology as an experimental science.

India, too, had an elaborate theory of "the self" in its Vedanta
Vedanta
Vedānta was originally a word used in Hindu philosophy as a synonym for that part of the Veda texts known also as the Upanishads. The name is a morphophonological form of Veda-anta = "Veda-end" = "the appendix to the Vedic hymns." It is also speculated that "Vedānta" means "the purpose or goal...

 philosophical writings (see e.g., Paranjpe, 1998).

Medieval Muslim physicians
Islamic medicine
In the history of medicine, Islamic medicine, Arabic medicine or Arabian medicine refers to medicine developed in the Islamic Golden Age, and written in Arabic, the lingua franca of Islamic civilization....

 also developed practices to treat patients suffering from a variety of "diseases of the mind".

Ahmed ibn Sahl al-Balkhi
Ahmed ibn Sahl al-Balkhi
Abu Zayd Ahmed ibn Sahl Balkhi was a Persian Muslim polymath: a geographer, mathematician, physician, psychologist and scientist. Born in 850 CE in Shamistiyan, in the Persian province of Balkh, Khorasan , he was a disciple of al-Kindi...

 (850–934) was among the first, in this tradition, to discuss disorders related to both the body and the mind, arguing that "if the nafs
Nafs
Nafs is an Arabic word which occurs in the Qur'an and means self, psyche, ego or soul. In its unrefined state, "the ego is the lowest dimension of man's inward existence, his animal and satanic nature." Nafs is an important concept in the Islamic tradition, especially within Sufism and the...

[psyche] gets sick, the body may also find no joy in life and may eventually develop a physical illness." Al-Balkhi recognized that the body
Body
With regard to living things, a body is the physical body of an individual. "Body" often is used in connection with appearance, health issues and death...

 and the soul
Soul
A soul in certain spiritual, philosophical, and psychological traditions is the incorporeal essence of a person or living thing or object. Many philosophical and spiritual systems teach that humans have souls, and others teach that all living things and even inanimate objects have souls. The...

 can be healthy or sick, or "balanced or imbalanced." He wrote that imbalance of the body can result in fever
Fever
Fever is a common medical sign characterized by an elevation of temperature above the normal range of due to an increase in the body temperature regulatory set-point. This increase in set-point triggers increased muscle tone and shivering.As a person's temperature increases, there is, in...

, headache
Headache
A headache or cephalalgia is pain anywhere in the region of the head or neck. It can be a symptom of a number of different conditions of the head and neck. The brain tissue itself is not sensitive to pain because it lacks pain receptors. Rather, the pain is caused by disturbance of the...

s and other bodily illnesses, while imbalance of the soul can result in anger
Anger
Anger is an automatic response to ill treatment. It is the way a person indicates he or she will not tolerate certain types of behaviour. It is a feedback mechanism in which an unpleasant stimulus is met with an unpleasant response....

, anxiety
Anxiety
Anxiety is a psychological and physiological state characterized by somatic, emotional, cognitive, and behavioral components. The root meaning of the word anxiety is 'to vex or trouble'; in either presence or absence of psychological stress, anxiety can create feelings of fear, worry, uneasiness,...

, sadness
Sadness
Sadness is emotional pain associated with, or characterized by feelings of disadvantage, loss, despair, helplessness, sorrow, and rage. When sad, people often become outspoken, less energetic, and emotional...

 and other nafs-related symptoms. He recognized two types of what we now call depression
Clinical depression
Major depressive disorder is a mental disorder characterized by an all-encompassing low mood accompanied by low self-esteem, and by loss of interest or pleasure in normally enjoyable activities...

: one caused by known reasons such as loss
Grief
Grief is a multi-faceted response to loss, particularly to the loss of someone or something to which a bond was formed. Although conventionally focused on the emotional response to loss, it also has physical, cognitive, behavioral, social, and philosophical dimensions...

 or failure
Failure
Failure refers to the state or condition of not meeting a desirable or intended objective, and may be viewed as the opposite of success. Product failure ranges from failure to sell the product to fracture of the product, in the worst cases leading to personal injury, the province of forensic...

, which can be treated psychologically; and the other caused by unknown reasons possibly caused by physiological reasons, which can be treated through physical medicine.

In the 1010s, the scientist
Persian people
The Persian people are part of the Iranian peoples who speak the modern Persian language and closely akin Iranian dialects and languages. The origin of the ethnic Iranian/Persian peoples are traced to the Ancient Iranian peoples, who were part of the ancient Indo-Iranians and themselves part of...

, Ibn al-Haytham (Alhazen) began to carry out experiment
Experiment
An experiment is a methodical procedure carried out with the goal of verifying, falsifying, or establishing the validity of a hypothesis. Experiments vary greatly in their goal and scale, but always rely on repeatable procedure and logical analysis of the results...

s in areas related to body and the nafs. In his Book of Optics
Book of Optics
The Book of Optics ; ; Latin: De Aspectibus or Opticae Thesaurus: Alhazeni Arabis; Italian: Deli Aspecti) is a seven-volume treatise on optics and other fields of study composed by the medieval Muslim scholar Alhazen .-See also:* Science in medieval Islam...

, for example, he examined visual perception
Visual perception
Visual perception is the ability to interpret information and surroundings from the effects of visible light reaching the eye. The resulting perception is also known as eyesight, sight, or vision...

 and what we now call sensation, including variations in sensitivity
Stimulus (physiology)
In physiology, a stimulus is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity....

, sensation of touch, perception
Perception
Perception is the process of attaining awareness or understanding of the environment by organizing and interpreting sensory information. All perception involves signals in the nervous system, which in turn result from physical stimulation of the sense organs...

 of colors, perception of darkness
Darkness
Darkness, in contrast with brightness, is a relative absence of visible light. It is the appearance of black in a color space. When light is not present, rod and cone cells within the eye are not stimulated. This lack of stimulation means photoreceptor cells are unable to distinguish color...

, the psychological explanation of the moon illusion
Moon illusion
The Moon illusion is an optical illusion in which the Moon appears larger near the horizon than it does while higher up in the sky. This optical illusion also occurs with the sun and star constellations. It has been known since ancient times, and recorded by numerous different cultures...

, and binocular vision
Binocular vision
Binocular vision is vision in which both eyes are used together. The word binocular comes from two Latin roots, bini for double, and oculus for eye. Having two eyes confers at least four advantages over having one. First, it gives a creature a spare eye in case one is damaged. Second, it gives a...

. Al-Biruni
Al-Biruni
Abū al-Rayḥān Muḥammad ibn Aḥmad al-BīrūnīArabic spelling. . The intermediate form Abū Rayḥān al-Bīrūnī is often used in academic literature...

 also employed such experimental methods in examining reaction time.

Avicenna
Avicenna
Abū ʿAlī al-Ḥusayn ibn ʿAbd Allāh ibn Sīnā , commonly known as Ibn Sīnā or by his Latinized name Avicenna, was a Persian polymath, who wrote almost 450 treatises on a wide range of subjects, of which around 240 have survived...

, similarly, did early work in the treatment of nafs-related illnesses, and developed a system for associating changes in the pulse
Pulse
In medicine, one's pulse represents the tactile arterial palpation of the heartbeat by trained fingertips. The pulse may be palpated in any place that allows an artery to be compressed against a bone, such as at the neck , at the wrist , behind the knee , on the inside of the elbow , and near the...

 rate with inner feelings. Avicenna also described phenomena we now recognize as neuropsychiatric conditions, including hallucination
Hallucination
A hallucination, in the broadest sense of the word, is a perception in the absence of a stimulus. In a stricter sense, hallucinations are defined as perceptions in a conscious and awake state in the absence of external stimuli which have qualities of real perception, in that they are vivid,...

, insomnia
Insomnia
Insomnia is most often defined by an individual's report of sleeping difficulties. While the term is sometimes used in sleep literature to describe a disorder demonstrated by polysomnographic evidence of disturbed sleep, insomnia is often defined as a positive response to either of two questions:...

, mania
Mania
Mania, the presence of which is a criterion for certain psychiatric diagnoses, is a state of abnormally elevated or irritable mood, arousal, and/ or energy levels. In a sense, it is the opposite of depression...

, nightmare
Nightmare
A nightmare is an unpleasant dream that can cause a strong negative emotional response from the mind, typically fear or horror, but also despair, anxiety and great sadness. The dream may contain situations of danger, discomfort, psychological or physical terror...

, melancholia
Melancholia
Melancholia , also lugubriousness, from the Latin lugere, to mourn; moroseness, from the Latin morosus, self-willed, fastidious habit; wistfulness, from old English wist: intent, or saturnine, , in contemporary usage, is a mood disorder of non-specific depression,...

, dementia
Dementia
Dementia is a serious loss of cognitive ability in a previously unimpaired person, beyond what might be expected from normal aging...

, epilepsy
Epilepsy
Epilepsy is a common chronic neurological disorder characterized by seizures. These seizures are transient signs and/or symptoms of abnormal, excessive or hypersynchronous neuronal activity in the brain.About 50 million people worldwide have epilepsy, and nearly two out of every three new cases...

, paralysis
Paralysis
Paralysis is loss of muscle function for one or more muscles. Paralysis can be accompanied by a loss of feeling in the affected area if there is sensory damage as well as motor. A study conducted by the Christopher & Dana Reeve Foundation, suggests that about 1 in 50 people have been diagnosed...

, stroke
Stroke
A stroke, previously known medically as a cerebrovascular accident , is the rapidly developing loss of brain function due to disturbance in the blood supply to the brain. This can be due to ischemia caused by blockage , or a hemorrhage...

, vertigo
Vertigo (medical)
Vertigo is a type of dizziness, where there is a feeling of motion when one is stationary. The symptoms are due to a dysfunction of the vestibular system in the inner ear...

 and tremor
Tremor
A tremor is an involuntary, somewhat rhythmic, muscle contraction and relaxation involving to-and-fro movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, face, head, vocal folds, trunk, and legs. Most tremors occur in the...

.

Other medieval thinkers who discussed issues related to psychology included:
  • Ibn Sirin
    Ibn Sirin
    Muhammad Ibn Sirin , was a Muslim interpreter of dreams who lived in the 8th century. He is a contemporary of Anas ibn Malik.-Biography:...

    , who wrote a book on dreams and dream interpretation
    Dream interpretation
    Dream interpretation is the process of assigning meaning to dreams. In many ancient societies, such as those of Egypt and Greece, dreaming was considered a supernatural communication or a means of divine intervention, whose message could be unravelled by people with certain powers...

    ;
  • Al-Kindi
    Al-Kindi
    ' , known as "the Philosopher of the Arabs", was a Muslim Arab philosopher, mathematician, physician, and musician. Al-Kindi was the first of the Muslim peripatetic philosophers, and is unanimously hailed as the "father of Islamic or Arabic philosophy" for his synthesis, adaptation and promotion...

     (Alkindus), who developed forms of music therapy
    Music therapy
    Music therapy is an allied health profession and one of the expressive therapies, consisting of an interpersonal process in which a trained music therapist uses music and all of its facets—physical, emotional, mental, social, aesthetic, and spiritual—to help clients to improve or maintain their...

  • Ali ibn Sahl Rabban al-Tabari
    Ali ibn Sahl Rabban al-Tabari
    Abu al-Hasan Ali ibn Sahl Rabban al-Tabari also given as 810-855 and 783-858 was a Persian Muslim hakim, Islamic scholar, physician and psychologist of Zoroastrian descent, who produced one of the first encyclopedia of medicine. He was a pioneer of pediatrics and the field of child development...

    , who developed al-‘ilaj al-nafs (sometimes translated as "psychotherapy
    Psychotherapy
    Psychotherapy is a general term referring to any form of therapeutic interaction or treatment contracted between a trained professional and a client or patient; family, couple or group...

    "),
  • Al-Farabi
    Al-Farabi
    ' known in the West as Alpharabius , was a scientist and philosopher of the Islamic world...

     (Alpharabius), who discussed subjects related to social psychology
    Social psychology
    Social psychology is the scientific study of how people's thoughts, feelings, and behaviors are influenced by the actual, imagined, or implied presence of others. By this definition, scientific refers to the empirical method of investigation. The terms thoughts, feelings, and behaviors include all...

     and consciousness
    Consciousness
    Consciousness is a term that refers to the relationship between the mind and the world with which it interacts. It has been defined as: subjectivity, awareness, the ability to experience or to feel, wakefulness, having a sense of selfhood, and the executive control system of the mind...

     studies;
  • Ali ibn Abbas al-Majusi
    Ali ibn Abbas al-Majusi
    Ali ibn al-'Abbas al-Majusi , also known as Masoudi, or Latinized as Haly Abbas, was a Persian physician and psychologist most famous for the Kitab al-Maliki or Complete Book of the Medical Art, his textbook on medicine and psychology.-Biography:He was born in Ahvaz, southwestern Persia, and...

     (Haly Abbas), described neuroanatomy
    Neuroanatomy
    Neuroanatomy is the study of the anatomy and organization of the nervous system. In contrast to animals with radial symmetry, whose nervous system consists of a distributed network of cells, animals with bilateral symmetry have segregated, defined nervous systems, and thus we can begin to speak of...

     and neurophysiology
    Neurophysiology
    Neurophysiology is a part of physiology. Neurophysiology is the study of nervous system function...

    ;
  • Abu al-Qasim al-Zahrawi (Abulcasis), described neurosurgery
    Neurosurgery
    Neurosurgery is the medical specialty concerned with the prevention, diagnosis, treatment, and rehabilitation of disorders which affect any portion of the nervous system including the brain, spine, spinal cord, peripheral nerves, and extra-cranial cerebrovascular system.-In the United States:In...

    ;
  • Abū Rayhān al-Bīrūnī, who described reaction time;
  • Ibn Tufail
    Ibn Tufail
    Ibn Tufail was an Andalusian Muslim polymath: an Arabic writer, novelist, Islamic philosopher, Islamic theologian, physician, vizier,...

    , who anticipated the tabula rasa
    Tabula rasa
    Tabula rasa is the epistemological theory that individuals are born without built-in mental content and that their knowledge comes from experience and perception. Generally proponents of the tabula rasa thesis favour the "nurture" side of the nature versus nurture debate, when it comes to aspects...

     argument and nature versus nurture
    Nature versus nurture
    The nature versus nurture debate concerns the relative importance of an individual's innate qualities versus personal experiences The nature versus nurture debate concerns the relative importance of an individual's innate qualities ("nature," i.e. nativism, or innatism) versus personal experiences...

     debate.


Ibn Zuhr
Ibn Zuhr
Abū Merwān ’Abdal-Malik ibn Zuhr was a Muslim physician, surgeon and teacher in Al-Andalus.He was born at Seville...

 (Avenzoar) described disorders similar to meningitis
Meningitis
Meningitis is inflammation of the protective membranes covering the brain and spinal cord, known collectively as the meninges. The inflammation may be caused by infection with viruses, bacteria, or other microorganisms, and less commonly by certain drugs...

, intracranial thrombophlebitis
Thrombophlebitis
Thrombophlebitis is phlebitis related to a thrombus . When it occurs repeatedly in different locations, it is known as "Thrombophlebitis migrans" or "migrating thrombophlebitis".-Signs and symptoms:...

, and mediastinal germ cell tumor
Mediastinal germ cell tumor
Malignant mediastinal germ cell tumors of various histologies were first described as a clinical entity approximately 50 years ago. Mediastinal and other extragonadal germ cell tumors were initially thought to represent isolated metastases from an inapparent gonadal primary site.-Etiology:Some...

s; Averroes
Averroes
' , better known just as Ibn Rushd , and in European literature as Averroes , was a Muslim polymath; a master of Aristotelian philosophy, Islamic philosophy, Islamic theology, Maliki law and jurisprudence, logic, psychology, politics, Arabic music theory, and the sciences of medicine, astronomy,...

 attributed photoreceptor properties to the retina
Retina
The vertebrate retina is a light-sensitive tissue lining the inner surface of the eye. The optics of the eye create an image of the visual world on the retina, which serves much the same function as the film in a camera. Light striking the retina initiates a cascade of chemical and electrical...

; and Maimonides
Maimonides
Moses ben-Maimon, called Maimonides and also known as Mūsā ibn Maymūn in Arabic, or Rambam , was a preeminent medieval Jewish philosopher and one of the greatest Torah scholars and physicians of the Middle Ages...

 described rabies
Rabies
Rabies is a viral disease that causes acute encephalitis in warm-blooded animals. It is zoonotic , most commonly by a bite from an infected animal. For a human, rabies is almost invariably fatal if post-exposure prophylaxis is not administered prior to the onset of severe symptoms...

 and belladonna
Deadly nightshade
Atropa belladonna or Atropa bella-donna, commonly known as Belladonna, Devil's Berries, Death Cherries or Deadly Nightshade, is a perennial herbaceous plant in the family Solanaceae, native to Europe, North Africa, and Western Asia. The foliage and berries are extremely toxic, containing tropane...

 intoxication.

Witelo
Witelo
Witelo was a friar, theologian and scientist: a physicist, natural philosopher, mathematician. He is an important figure in the history of philosophy in Poland...

 is considered a precursor of perception
Perception
Perception is the process of attaining awareness or understanding of the environment by organizing and interpreting sensory information. All perception involves signals in the nervous system, which in turn result from physical stimulation of the sense organs...

 psychology. His Perspectiva contains much material in psychology
Psychology
Psychology is the study of the mind and behavior. Its immediate goal is to understand individuals and groups by both establishing general principles and researching specific cases. For many, the ultimate goal of psychology is to benefit society...

, outlining views that are close to modern notions on the association
Association (psychology)
In psychology and marketing, two concepts or stimuli are associated when the experience of one leads to the effects of another, due to repeated pairing. This is sometimes called Pavlovian association for Ivan Pavlov's pioneering of classical conditioning....

 of ideas and on the subconscious
Subconscious
The term subconscious is used in many different contexts and has no single or precise definition. This greatly limits its significance as a definition-bearing concept, and in consequence the word tends to be avoided in academic and scientific settings....

.

Beginnings of Western psychology

Many of the Ancients'
Ancient philosophy
This page lists some links to ancient philosophy. In Western philosophy, the spread of Christianity through the Roman Empire marked the ending of Hellenistic philosophy and ushered in the beginnings of Medieval philosophy, whereas in Eastern philosophy, the spread of Islam through the Arab Empire...

 writings would have been lost had it not been for the efforts of the Christian, Jewish and Persian translators in the House of Wisdom
House of Wisdom
The House of Wisdom was a library and translation institute established in Abbassid-era Baghdad, Iraq. It was a key institution in the Translation Movement and considered to have been a major intellectual centre during the Islamic Golden Age...

, the House of Knowledge, and other such institutions, whose glosses and commentaries were later translated into Latin in the 12th century. However, it is not clear how these sources first came to be used during the Renaissance
Renaissance
The Renaissance was a cultural movement that spanned roughly the 14th to the 17th century, beginning in Italy in the Late Middle Ages and later spreading to the rest of Europe. The term is also used more loosely to refer to the historical era, but since the changes of the Renaissance were not...

, and their influence on what would later emerge as the discipline of psychology is a topic of scholarly debate.

Etymology and early usage of word

The first use of the term "psychology" is often attributed to the German scholastic
Scholasticism
Scholasticism is a method of critical thought which dominated teaching by the academics of medieval universities in Europe from about 1100–1500, and a program of employing that method in articulating and defending orthodoxy in an increasingly pluralistic context...

 philosopher Rudolf Göckel (1547–1628, often known under the Latin form Rudolph Goclenius
Rudolph Goclenius
Rudolph Göckel or Rudolf Goclenius [the Older] was a German scholastic philosopher, credited with inventing the term psychology .-Life:He was born in Korbach, Waldeck...

), who published the Psychologia hoc est de hominis perfectione, anima, ortu in Marburg
Marburg
Marburg is a city in the state of Hesse, Germany, on the River Lahn. It is the main town of the Marburg-Biedenkopf district and its population, as of March 2010, was 79,911.- Founding and early history :...

 in 1590. However, the term seems to have been used more than six decades earlier by the Croatian humanist Marko Marulić
Marko Marulic
Marko Marulić |Split]], 18 August 1450 – Split, 5 January 1524) was a Croatian national poet and Christian humanist, known as the Crown of the Croatian Medieval Age and the father of the Croatian Renaissance. He signed his works as Marko Marulić Splićanin , Marko Pečenić, Marcus Marulus ...

 (1450–1524) in the title of his Latin treatise, Psichiologia de ratione animae humanae. Although the treatise itself has not been preserved, its title appears in a list of Marulic's works compiled by his younger contemporary, Franjo Bozicevic-Natalis in his "Vita Marci Maruli Spalatensis" (Krstić, 1964). This, of course, may well not have been the very first usage, but it is the earliest documented use at present.

The term did not come into popular usage until the German idealist philosopher, Christian Wolff
Christian Wolff (philosopher)
Christian Wolff was a German philosopher.He was the most eminent German philosopher between Leibniz and Kant...

 (1679–1754) used it in his Psychologia empirica and Psychologia rationalis (1732–1734). This distinction between empirical and rational psychology was picked up in Denis Diderot
Denis Diderot
Denis Diderot was a French philosopher, art critic, and writer. He was a prominent person during the Enlightenment and is best known for serving as co-founder and chief editor of and contributor to the Encyclopédie....

's (1713–1780) Encyclopédie
Encyclopédie
Encyclopédie, ou dictionnaire raisonné des sciences, des arts et des métiers was a general encyclopedia published in France between 1751 and 1772, with later supplements, revised editions, and translations. It was edited by Denis Diderot and Jean le Rond d'Alembert...

(1751–1784) and was popularized in France by Maine de Biran (1766–1824). In England, the term "psychology" overtook "mental philosophy" in the middle of the 19th century, especially in the work of William Hamilton
William Hamilton
-Europeans:Politicians and noblemen*William Hamilton, 2nd Duke of Hamilton , Scottish nobleman*William Douglas-Hamilton, Duke of Hamilton , Scottish Nobleman*William Hamilton , Lord Chancellor of England...

 (1788–1856) (see Danziger, 1997, chap. 3).

Enlightenment psychological thought

Early psychology was regarded as the study of the soul (in the Christian sense of the term). The modern philosophical form of psychology was heavily influenced by the works of René Descartes
René Descartes
René Descartes ; was a French philosopher and writer who spent most of his adult life in the Dutch Republic. He has been dubbed the 'Father of Modern Philosophy', and much subsequent Western philosophy is a response to his writings, which are studied closely to this day...

 (1596–1650), and the debates that he generated, of which the most relevant were the objections to his Meditations on First Philosophy
Meditations on First Philosophy
Meditations on First Philosophy is a philosophical treatise written by René Descartes and first published in 1641 . The French translation was published in 1647 as Méditations Metaphysiques...

(1641), published with the text. Also important to the later development of psychology were his Passions of the Soul
Passions of the Soul
In the treatise Passions of the Soul , the last of Descartes' published work, completed in 1649 and dedicated to Princess Elizabeth of Bohemia, the author contributes to a long tradition of theorizing "the passions." The passions were experiences often equated with or labeled as precursors to what...

(1649) and Treatise on Man (completed in 1632 but, along with the rest of The World, withheld from publication after Descartes heard of the Catholic Church's condemnation of Galileo; it was eventually published posthumously, in 1664).

Although not educated as a physician, Descartes did extensive anatomical studies of bulls' hearts and was considered important enough that William Harvey
William Harvey
William Harvey was an English physician who was the first person to describe completely and in detail the systemic circulation and properties of blood being pumped to the body by the heart...

 responded to him. Descartes was one of the first to endorse Harvey's model of the circulation of the blood, but disagreed with his metaphysical framework to explain it. Descartes dissected animals and human cadavers and as a result was familiar with the research on the flow of blood leading to the conclusion that the body is a complex device that is capable of moving without the soul, thus contradicting the "Doctrine of the Soul". The emergence of psychology as a medical discipline was given a major boost by Thomas Willis
Thomas Willis
Thomas Willis was an English doctor who played an important part in the history of anatomy, neurology and psychiatry. He was a founding member of the Royal Society.-Life:...

, not only in his reference to psychology (the "Doctrine of the Soul") in terms of brain function, but through his detailed 1672 anatomical work, and his treatise "De Anima Brutorum" ("Two Discourses on the Souls of Brutes"). However, Willis acknowledged the influence of Descartes's rival, Pierre Gassendi, as an inspiration for his work.

The philosophers of the British Empiricist and Associationist schools had a profound impact on the later course of experimental psychology. John Locke
John Locke
John Locke FRS , widely known as the Father of Liberalism, was an English philosopher and physician regarded as one of the most influential of Enlightenment thinkers. Considered one of the first of the British empiricists, following the tradition of Francis Bacon, he is equally important to social...

's An Essay Concerning Human Understanding
An Essay Concerning Human Understanding
First appearing in 1690 with the printed title An Essay Concerning Humane Understanding, An Essay Concerning Human Understanding by John Locke concerns the foundation of human knowledge and understanding. He describes the mind at birth as a blank slate filled later through experience...

(1689), George Berkeley
George Berkeley
George Berkeley , also known as Bishop Berkeley , was an Irish philosopher whose primary achievement was the advancement of a theory he called "immaterialism"...

's Treatise Concerning the Principles of Human Knowledge
Treatise Concerning the Principles of Human Knowledge
A Treatise Concerning the Principles of Human Knowledge is a 1710 work by Anglo-Irish Empiricist philosopher George Berkeley. This book largely seeks to refute the claims made by his contemporary John Locke about the nature of human perception...

(1710), and David Hume
David Hume
David Hume was a Scottish philosopher, historian, economist, and essayist, known especially for his philosophical empiricism and skepticism. He was one of the most important figures in the history of Western philosophy and the Scottish Enlightenment...

's A Treatise of Human Nature
A Treatise of Human Nature
A Treatise of Human Nature is a book by Scottish philosopher David Hume, first published in 1739–1740.The full title of the Treatise is 'A Treatise of Human Nature: Being an Attempt to introduce the experimental Method of Reasoning into Moral Subjects'. It contains the following sections:* Book 1:...

(1739–1740) were particularly influential, as were David Hartley
David Hartley (philosopher)
David Hartley was an English philosopher and founder of the Associationist school of psychology. -Early life and education:...

's Observations on Man
Observations on Man
Observations on Man, his Frame, his Duty, and his Expectations is 18th-century British philosopher David Hartley's major work. Published in two parts in 1749 by Samuel Richardson, it puts forth Hartley's principal theories: the doctrine of vibrations and the doctrine of associations...

(1749) and John Stuart Mill
John Stuart Mill
John Stuart Mill was a British philosopher, economist and civil servant. An influential contributor to social theory, political theory, and political economy, his conception of liberty justified the freedom of the individual in opposition to unlimited state control. He was a proponent of...

's A System of Logic
A System of Logic
A System of Logic, Ratiocinative and Inductive is an 1843 book by English philosopher John Stuart Mill. In this work, he formulated the five principles of inductive reasoning that are known as Mill's methods.-References:...

. (1843). Also notable was the work of some Continental Rationalist philosophers, especially Baruch Spinoza
Baruch Spinoza
Baruch de Spinoza and later Benedict de Spinoza was a Dutch Jewish philosopher. Revealing considerable scientific aptitude, the breadth and importance of Spinoza's work was not fully realized until years after his death...

's (1632–1677) On the Improvement of the Understanding (1662) and Gottfried Wilhelm Leibniz's (1646–1716) New Essays on Human Understanding
New Essays on Human Understanding
New Essays on Human Understanding is a chapter-by-chapter rebuttal by Gottfried Leibniz of John Locke's major work, An Essay Concerning Human Understanding. It is one of only two full-length works by Leibniz...

(completed 1705, published 1765). Rauch, Frederick A. (1806–1841) Psychology, or a view of the human soul, including anthropology (1840).

The Danish philosopher Søren Kierkegaard
Søren Kierkegaard
Søren Aabye Kierkegaard was a Danish Christian philosopher, theologian and religious author. He was a critic of idealist intellectuals and philosophers of his time, such as Georg Wilhelm Friedrich Hegel, Friedrich Wilhelm Joseph Schelling and Karl Wilhelm Friedrich Schlegel...

 also influenced the humanistic, existential, and modern psychological schools with his works The Concept of Anxiety (1844) and The Sickness Unto Death
The Sickness Unto Death
The Sickness Unto Death is a book written by Danish philosopher Søren Kierkegaard in 1849 under the pseudonym Anti-Climacus...

(1849).

Transition to contemporary psychology

Also influential on the emerging discipline of psychology were debates surrounding the efficacy of Mesmerism (a precursor to hypnosis) and the value of phrenology
Phrenology
Phrenology is a pseudoscience primarily focused on measurements of the human skull, based on the concept that the brain is the organ of the mind, and that certain brain areas have localized, specific functions or modules...

. The former was developed in the 1770s by Austrian physician Anton Mesmer (1734–1815) who claimed to use the power of gravity, and later of "animal magnetism", to cure various physical and mental ills. As Mesmer and his treatment became increasingly fashionable in both Vienna and Paris, it also began to come under the scrutiny of suspicious officials. In 1784, an investigation was commissioned in Paris by King Louis XVI
Louis XVI of France
Louis XVI was a Bourbon monarch who ruled as King of France and Navarre until 1791, and then as King of the French from 1791 to 1792, before being executed in 1793....

 which included American ambassador Benjamin Franklin
Benjamin Franklin
Dr. Benjamin Franklin was one of the Founding Fathers of the United States. A noted polymath, Franklin was a leading author, printer, political theorist, politician, postmaster, scientist, musician, inventor, satirist, civic activist, statesman, and diplomat...

, chemist Antoine Lavoisier
Antoine Lavoisier
Antoine-Laurent de Lavoisier , the "father of modern chemistry", was a French nobleman prominent in the histories of chemistry and biology...

 and physician Joseph-Ignace Guillotin
Joseph-Ignace Guillotin
Dr. Joseph-Ignace Guillotin was a French physician who proposed on 10 October 1789 the use of a device to carry out death penalties in France. While he did not invent the guillotine, and in fact opposed the death penalty, his name became an eponym for it...

 (later the popularizer of the guillotine). They concluded that Mesmer's method was useless. Abbé Faria
Abbé Faria
Abbé Faria , or Abbé José Custódio de Faria, , was a colourful Goan Catholic monk who was one of the pioneers of the scientific study of hypnotism, following on from the work of Franz Anton Mesmer...

, an Indo-Portuguese priest, revived public attention in animal magnetism. Unlike Mesmer, Faria claimed that the effect was 'generated from within the mind’ by the power of expectancy and cooperation of the patient.
Although disputed, the "magnetic" tradition continued among Mesmer's students and others, resurfacing in England in the 19th century in the work of the physician John Elliotson
John Elliotson
John Elliotson was an English physician, born in Southwark, London.He studied medicine first at the University of Edinburgh , where he was influenced by Thomas Brown, M.D...

 (1791–1868), and the surgeons James Esdaile
James Esdaile
Dr James Esdaile , the eldest son of the Rev. James Esdaile and Margaret Blair, was born on 6 February 1808 in Montrose, Angus, Scotland, is a notable figure in the history of mesmerism. Esdaile married three times.-Education:...

 (1808–1859), and James Braid
James Braid
James Braid may refer to:*James Braid *James Braid -See also:*James Braid Taylor, banker...

 (1795–1860) (who reconceptualized it as property of the subject's mind rather than a "power" of the Mesmerist's, and relabeled it "hypnotism"). Mesmerism also continued to have a strong social (if not medical) following in England through the 19th century (see Winter, 1998). Faria's approach was significantly extended by the clinical and theoretical work of Ambroise-Auguste Liébeault
Ambroise-Auguste Liébeault
Ambroise-Auguste Liébeault was a French physician universally acknowledged as the founder of the famous school that became known as the "Nancy School", or the "Suggestion School", and he is considered by many to...

 and Hippolyte Bernheim
Hippolyte Bernheim
Hippolyte Bernheim was a French physician and neurologist, born at Mülhausen, Alsace. He received his education in his native town and at the University of Strasbourg, where he was graduated as doctor of medicine in 1867...

 of the Nancy School
Nancy School
The Nancy School was an early French suggestion-centred school of psychotherapy founded in 1866 by Ambroise-Auguste Liébeault, a follower of the theory of Abbé Faria, in the city of Nancy....

. Faria's theoretical position, and the subsequent experiences of those in the Nancy School made significant contributions to the later autosuggestion techniques of Émile Coué
Émile Coué
Émile Coué de la Châtaigneraie was a French psychologist and pharmacist who introduced a method of psychotherapy and self-improvement based on optimistic autosuggestion....

. It was adopted for the treatment of hysteria
Hysteria
Hysteria, in its colloquial use, describes unmanageable emotional excesses. People who are "hysterical" often lose self-control due to an overwhelming fear that may be caused by multiple events in one's past that involved some sort of severe conflict; the fear can be centered on a body part, or,...

 by the director of Paris's Salpêtrière Hospital, Jean-Martin Charcot
Jean-Martin Charcot
Jean-Martin Charcot was a French neurologist and professor of anatomical pathology. He is known as "the founder of modern neurology" and is "associated with at least 15 medical eponyms", including Charcot-Marie-Tooth disease and amyotrophic lateral sclerosis...

 (1825–1893).

Phrenology
Phrenology
Phrenology is a pseudoscience primarily focused on measurements of the human skull, based on the concept that the brain is the organ of the mind, and that certain brain areas have localized, specific functions or modules...

 began as "organology", a theory of brain structure developed by the German physician, Franz Joseph Gall
Franz Joseph Gall
Franz Joseph Gall was a neuroanatomist, physiologist, and pioneer in the study of the localization of mental functions in the brain.- Life :...

 (1758–1828). Gall argued that the brain is divided into a large number of functional "organs", each responsible for particular human mental abilities and dispositions – hope, love, spirituality, greed, language, the abilities to detect the size, form, and color of objects, etc. He argued that the larger each of these organs are, the greater the power of the corresponding mental trait. Further, he argued that one could detect the sizes of the organs in a given individual by feeling the surface of that person's skull. Gall's ultra-localizationist position with respect to the brain was soon attacked, most notably by French anatomist Pierre Flourens (1794–1867), who conducted ablation studies (on chickens) which purported to demonstrate little or no cerebral localization of function. Although Gall had been a serious (if misguided) researcher, his theory was taken by his assistant, Johann Gaspar Spurzheim
Johann Spurzheim
Johann Gaspar Spurzheim was a German physician who became one of the chief proponents of phrenology created approximately in 1800 by Franz Joseph Gall...

  (1776–1832), and developed into the profitable, popular enterprise of phrenology
Phrenology
Phrenology is a pseudoscience primarily focused on measurements of the human skull, based on the concept that the brain is the organ of the mind, and that certain brain areas have localized, specific functions or modules...

, which soon spawned, especially in Britain, a thriving industry of independent practitioners. In the hands of Scottish religious leader George Combe
George Combe
George Combe , was a Scottish lawyer and writer on phrenology and education. In later years, he devoted himself to the promotion of phrenology. His major work was The Constitution of Man .-Early life:...

 (1788–1858) (whose book The Constitution of Man
The Constitution of Man
The Constitution of Man is the classical exposition of phrenology, written by George Combe and published in 1828. It furthered the popularity of phrenology by finding a pathway to a personal philosophy which was in tune with the scientific understanding of the time. The Constitution bridged the...

was one of the best-sellers of the century), phrenology became strongly associated with political reform movements and egalitarian principles (see, e.g., Shapin, 1975; but also see van Wyhe, 2004). Phrenology soon spread to America as well, where itinerant practical phrenologists assessed the mental well-being of willing customers (see Sokal, 2001).

The Emergence of German Experimental Psychology

Until the middle of the 19th century, psychology was widely regarded as a branch of philosophy
Philosophy
Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

. For instance, Immanuel Kant
Immanuel Kant
Immanuel Kant was a German philosopher from Königsberg , researching, lecturing and writing on philosophy and anthropology at the end of the 18th Century Enlightenment....

 (1724–1804) declared in his Metaphysical Foundations of Natural Science
Metaphysical Foundations of Natural Science
Immanuel Kant's Metaphysical Foundations of Natural Science was a basic influence on the rise of science departments of the universities in the German-speaking countries in the nineteenth century.Hans Christian Ørsted wrote "Differential and integral...

(1786) that psychology cannot be made into a "proper" science because its phenomena cannot be rendered in mathematical form, among other reasons. However, Kant proposed what looks to modern eyes very much like an empirical psychology in his Anthropology from a Pragmatic Point of View (1798).

Johann Friedrich Herbart
Johann Friedrich Herbart
Johann Friedrich Herbart was a German philosopher, psychologist, and founder of pedagogy as an academic discipline....

 (1776–1841) took issue with Kant's conclusion and attempted to develop a mathematical basis for a scientific psychology. Although he was unable to empirically realize the terms of his psychological theory, his efforts did lead scientists such as Ernst Heinrich Weber
Ernst Heinrich Weber
Ernst Heinrich Weber was a German physician who is considered one of the founders of experimental psychology.Weber studied medicine at Wittenberg University...

 (1795–1878) and Gustav Theodor Fechner (1801–1887) to attempt to measure the mathematical relationships between the physical magnitudes of external stimuli and the psychological intensities of the resulting sensations. Fechner (1860) is the originator of the term psychophysics
Psychophysics
Psychophysics quantitatively investigates the relationship between physical stimuli and the sensations and perceptions they effect. Psychophysics has been described as "the scientific study of the relation between stimulus and sensation" or, more completely, as "the analysis of perceptual...

.

Meanwhile, individual differences in reaction time had become a critical issue in the field of astronomy, under the name of the "personal equation
Personal equation
The personal equation, in 19th- and early 20th-century science, referred to the idea that every individual observer had an inherent bias when it came to measurements and observations....

". Early researches by Friedrich Wilhelm Bessel (1784–1846) in Königsberg
Königsberg
Königsberg was the capital of East Prussia from the Late Middle Ages until 1945 as well as the northernmost and easternmost German city with 286,666 inhabitants . Due to the multicultural society in and around the city, there are several local names for it...

 and Adolf Hirsch led to the development of a highly precise chronoscope by Mathias Hipp that, in turn, was based on a design by Charles Wheatstone
Charles Wheatstone
Sir Charles Wheatstone FRS , was an English scientist and inventor of many scientific breakthroughs of the Victorian era, including the English concertina, the stereoscope , and the Playfair cipher...

 for a device that measured the speed of artillery shells (Edgell & Symes, 1906). Other timing instruments were borrowed from physiology (e.g., the kymograph
Kymograph
A kymograph is a device that gives a graphical representation of spatial position over time in which a spatial axis represents time...

) and adapted for use by the Utrecht ophthalmologist Franciscus Donders
Franciscus Donders
-External links:* B. Theunissen. , F.C. Donders: turning refracting into science, @ History of science and scholarship in the Netherlands.* in the Virtual Laboratory of the Max Planck Institute for the History of Science* P. Eling, , Geneeskundige en fysioloog....

 (1818–1899) and his student Johan Jacob de Jaager in measuring the duration of simple mental decisions.

The 19th century was also the period in which physiology, including neurophysiology, professionalized and saw some of its most significant discoveries. Among its leaders were Charles Bell
Charles Bell
Sir Charles Bell was a Scottish surgeon, anatomist, neurologist and philosophical theologian.His three older brothers included John Bell , also a noted surgeon and writer; and the advocate George Joseph Bell .-Life:...

 (1774–1843) and François Magendie
François Magendie
François Magendie was a French physiologist, considered a pioneer of experimental physiology. He is known for describing the foramen of Magendie. There is also a Magendie sign, a downward and inward rotation of the eye due to a lesion in the cerebellum...

 (1783–1855) who independently discovered the distinction between sensory and motor nerves in the spinal column, Johannes Müller
Johannes Peter Müller
Johannes Peter Müller , was a German physiologist, comparative anatomist, and ichthyologist not only known for his discoveries but also for his ability to synthesize knowledge.-Early years and education:...

 (1801–1855) who proposed the doctrine of specific nerve energies
Law of specific nerve energies
The law of specific nerve energies, first proposed by Johannes Peter Müller in 1835, is that the nature of perception is defined by the pathway over which the sensory information is carried. Hence, the origin of the sensation is not important...

, Emil du Bois-Reymond
Emil du Bois-Reymond
Emil du Bois-Reymond was a German physician and physiologist, the discoverer of nerve action potential, and the father of experimental electrophysiology.-Life:...

 (1818–1896) who studied the electrical basis of muscle contraction, Pierre Paul Broca (1824–1880) and Carl Wernicke (1848–1905) who identified areas of the brain responsible for different aspects of language, as well as Gustav Fritsch
Gustav Fritsch
Gustav Theodor Fritsch was a German anatomist, anthropologist, traveller and physiologist from Cottbus, best known for his work with neuropsychiatrist Eduard Hitzig on the electric localization of the motor areas of the brain...

 (1837–1927), Eduard Hitzig
Eduard Hitzig
Eduard Hitzig was a German neurologist and neuropsychiatrist born in Berlin.He studied medicine at the Universities of Berlin and Würzburg, and had as instructors, famous men such as Emil Du Bois-Reymond , Rudolf Virchow , Moritz Heinrich Romberg and Karl Friedrich Otto Westphal...

 (1839–1907), and David Ferrier
David Ferrier
Sir David Ferrier, FRS was a pioneering Scottish neurologist and psychologist.-Life:Ferrier was born in Woodside, Aberdeen and educated at Aberdeen Grammar School before studying for an MA at Aberdeen University...

 (1843–1924) who localized sensory and motor areas of the brain. One of the principal founders of experimental physiology, Hermann von Helmholtz
Hermann von Helmholtz
Hermann Ludwig Ferdinand von Helmholtz was a German physician and physicist who made significant contributions to several widely varied areas of modern science...

 (1821–1894), conducted studies of a wide range of topics that would later be of interest to psychologists – the speed of neural transmission, the natures of sound and color, and of our perceptions of them, etc. In the 1860s, while he held a position in Heidelberg, Helmholtz engaged as an assistant a young M.D. named Wilhelm Wundt
Wilhelm Wundt
Wilhelm Maximilian Wundt was a German physician, psychologist, physiologist, philosopher, and professor, known today as one of the founding figures of modern psychology. He is widely regarded as the "father of experimental psychology"...

. Wundt employed the equipment of the physiology laboratory – chronoscope, kymograph
Kymograph
A kymograph is a device that gives a graphical representation of spatial position over time in which a spatial axis represents time...

, and various peripheral devices – to address more complicated psychological questions than had not, until then, been investigated experimentally. In particular he was interested in the nature of apperception
Apperception
Apperception is any of several aspects of perception and consciousness in such fields as psychology, philosophy and epistemology.-Meaning in psychology:...

 – the point at which a perception occupies the central focus of conscious awareness.

In 1874 Wundt took up a professorship in Zürich
Zürich
Zurich is the largest city in Switzerland and the capital of the canton of Zurich. It is located in central Switzerland at the northwestern tip of Lake Zurich...

, where he published his landmark textbook, Grundzüge der physiologischen Psychologie (Principles of Physiological Psychology, 1874). Moving to a more prestigious professorship in Leipzig
Leipzig
Leipzig Leipzig has always been a trade city, situated during the time of the Holy Roman Empire at the intersection of the Via Regia and Via Imperii, two important trade routes. At one time, Leipzig was one of the major European centres of learning and culture in fields such as music and publishing...

 in 1875, Wundt founded a laboratory specifically dedicated to original research in experimental psychology in 1879, the first laboratory of its kind in the world. In 1883, he launched a journal in which to publish the results of his, and his students', research, Philosophische Studien
Philosophische Studien
Philosophische Studien was the first journal of experimental psychology, founded by Wilhelm Wundt in 1883.It was succeeded by the Archiv für die gesamte Psychologie in 1903.- External links :...

(Philosophical Studies) (For more on Wundt, see, e.g., Bringmann & Tweney, 1980; Rieber & Robinson, 2001). Wundt attracted a large number of students not only from Germany, but also from abroad. Among his most influential American students were G. Stanley Hall
G. Stanley Hall
Granville Stanley Hall was a pioneering American psychologist and educator. His interests focused on childhood development and evolutionary theory...

 (who had already obtained a PhD from Harvard under the supervision of William James
William James
William James was a pioneering American psychologist and philosopher who was trained as a physician. He wrote influential books on the young science of psychology, educational psychology, psychology of religious experience and mysticism, and on the philosophy of pragmatism...

), James McKeen Cattell
James McKeen Cattell
James McKeen Cattell , American psychologist, was the first professor of psychology in the United States at the University of Pennsylvania and long-time editor and publisher of scientific journals and publications, most notably the journal Science...

 (who was Wundt's first assistant), and Frank Angell
Frank Angell
Frank Angell was an early American psychologist. The nephew of University of Vermont and University of Michigan president, James Burrill Angell and cousin of University of Chicago psychologist and Yale University president James Rowland Angell, Frank Angell earn his PhD in the Leipzig laboratory of...

. The most influential British student was Edward Bradford Titchener (who later became professor at Cornell
Cornell University
Cornell University is an Ivy League university located in Ithaca, New York, United States. It is a private land-grant university, receiving annual funding from the State of New York for certain educational missions...

).

Experimental psychology laboratories were soon also established at Berlin by Carl Stumpf
Carl Stumpf
Carl Stumpf was a German philosopher and psychologist.Born in Wiesentheid, he studied with Franz Brentano and Hermann Lotze...

 (1848–1936) and at Göttingen by Georg Elias Müller
Georg Elias Müller
Georg Elias Müller was a significant early German experimental psychologist.-Biography:Born in Grimma, Saxony, he completed his doctorate in 1873 under the supervision of Hermann Lotze in Göttingen. He was also educated at the universities of Leipzig and Berlin...

 (1850–1934). Another major German experimental psychologist of the era, though he did not direct his own research institute, was Hermann Ebbinghaus
Hermann Ebbinghaus
Hermann Ebbinghaus was a German psychologist who pioneered the experimental study of memory, and is known for his discovery of the forgetting curve and the spacing effect. He was also the first person to describe the learning curve...

 (1850–1909).

Experimentation was not the only approach to psychology in the German-speaking world at this time. Starting in the 1890s, employing the case study technique, the Viennese physician Sigmund Freud
Sigmund Freud
Sigmund Freud , born Sigismund Schlomo Freud , was an Austrian neurologist who founded the discipline of psychoanalysis...

 developed and applied the methods of hypnosis, free association, and dream interpretation to reveal putatively unconscious
Unconscious mind
The unconscious mind is a term coined by the 18th century German romantic philosopher Friedrich Schelling and later introduced into English by the poet and essayist Samuel Taylor Coleridge...

 beliefs and desires that he argued were the underlying causes of his patients' "hysteria
Hysteria
Hysteria, in its colloquial use, describes unmanageable emotional excesses. People who are "hysterical" often lose self-control due to an overwhelming fear that may be caused by multiple events in one's past that involved some sort of severe conflict; the fear can be centered on a body part, or,...

." He dubbed this approach psychoanalysis
Psychoanalysis
Psychoanalysis is a psychological theory developed in the late 19th and early 20th centuries by Austrian neurologist Sigmund Freud. Psychoanalysis has expanded, been criticized and developed in different directions, mostly by some of Freud's former students, such as Alfred Adler and Carl Gustav...

. Freudian psychoanalysis is particularly notable for the emphasis it places on the course of an individual's sexual development in pathogenesis
Pathogenesis
The pathogenesis of a disease is the mechanism by which the disease is caused. The term can also be used to describe the origin and development of the disease and whether it is acute, chronic or recurrent...

. Psychoanalytic concepts have had a strong and lasting influence on Western culture, particularly on the arts. Although its scientific contribution is still a matter of debate, both Freudian and Jungian
Carl Jung
Carl Gustav Jung was a Swiss psychiatrist and the founder of Analytical Psychology. Jung is considered the first modern psychiatrist to view the human psyche as "by nature religious" and make it the focus of exploration. Jung is one of the best known researchers in the field of dream analysis and...

 psychology revealed the existence of compartmentalized thinking, in which some behavior and thoughts are hidden from consciousness – yet operative as part of the complete personality. Hidden agendas, a bad conscience, or a sense of guilt, are examples of the existence of mental processes in which the individual is not conscious, through choice or lack of understanding, of some aspects of their personality and subsequent behavior.

Psychoanalysis examines mental processes which affect the ego. An understanding of these theoretically allows the individual greater choice and consciousness with a healing effect in neurosis and occasionally in psychosis, both of which Richard von Krafft-Ebing defined as "diseases of the personality". Carl G. Jung
Carl Jung
Carl Gustav Jung was a Swiss psychiatrist and the founder of Analytical Psychology. Jung is considered the first modern psychiatrist to view the human psyche as "by nature religious" and make it the focus of exploration. Jung is one of the best known researchers in the field of dream analysis and...

 was an associate of Freud's who later broke with him over Freud's emphasis on sexuality. Working with concepts of the unconscious first noted during the 1800s (by John Stuart Mill
John Stuart Mill
John Stuart Mill was a British philosopher, economist and civil servant. An influential contributor to social theory, political theory, and political economy, his conception of liberty justified the freedom of the individual in opposition to unlimited state control. He was a proponent of...

, Krafft-Ebing, Pierre Janet
Pierre Janet
Pierre Marie Félix Janet was a pioneering French psychologist, philosopher and psychotherapist in the field of dissociation and traumatic memory....

, Théodore Flournoy
Théodore Flournoy
Théodore Flournoy was a professor of psychology at the University of Geneva and author of books on spiritism and psychic phenomena...

 and others), Jung defined four mental functions which relate to and define the ego, the conscious self. Sensation (which tell consciousness that something is there), feelings (which consist of value judgments, and motivate our reaction to what we have sensed), intellect (an analytic function that compares this event to all known events and gives it a class and category, allowing us to understand a situation within a historical process, personal or public), and intuition (a mental function with access to deep behavioral patterns, intuition can suggest unexpected solutions or predict unforeseen consequences, "as if seeing around corners" as Jung put it). Jung insisted on an empirical psychology in which theories must be based on facts and not on the psychologist's projections or expectations.

Early American Psychology

Around 1875 the Harvard physiology instructor (as he then was), William James
William James
William James was a pioneering American psychologist and philosopher who was trained as a physician. He wrote influential books on the young science of psychology, educational psychology, psychology of religious experience and mysticism, and on the philosophy of pragmatism...

, opened a small experimental psychology demonstration laboratory for use with his courses. The laboratory was never used, in those days, for original research, and so controversy remains as to whether it is to be regarded as the "first" experimental psychology laboratory or not. In 1878, James gave a series of lectures at Johns Hopkins University
Johns Hopkins University
The Johns Hopkins University, commonly referred to as Johns Hopkins, JHU, or simply Hopkins, is a private research university based in Baltimore, Maryland, United States...

 entitled "The Senses and the Brain and their Relation to Thought" in which he argued, contra Thomas Henry Huxley, that consciousness is not epiphenomenal
Epiphenomenalism
In philosophy of mind, epiphenomenalism, also known as Type-E Dualism, is a view that "mental" states do not have any influence on "physical" states.-Background:...

, but must have an evolutionary function, or it would not have been naturally selected in humans. The same year James was contracted by Henry Holt
Henry Holt
Henry Holt , was a book publisher and author.Henry Holt was born in Baltimore, Maryland on January 3, 1840.He graduated from Yale in 1862....

 to write a textbook on the "new" experimental psychology. If he had written it quickly, it would have been the first English-language textbook on the topic. It was twelve years, however, before his two-volume Principles of Psychology
Principles of Psychology
The Principles of Psychology is a monumental text in the history of psychology, written by William James and published in 1890.There were four methods in James' psychology: analysis , introspection , experiment The Principles of Psychology is a monumental text in the history of psychology, written...

would be published. In the meantime textbooks were published by George Trumbull Ladd
George Trumbull Ladd
George Trumbull Ladd was an American philosopher, educator and psychologist.-Early life and ancestors:...

 of Yale
YALE
RapidMiner, formerly YALE , is an environment for machine learning, data mining, text mining, predictive analytics, and business analytics. It is used for research, education, training, rapid prototyping, application development, and industrial applications...

 (1887) and James Mark Baldwin
James Mark Baldwin
James Mark Baldwin was an American philosopher and psychologist who was educated at Princeton under the supervision of Scottish philosopher James McCosh and who was one of the founders of the Department of Psychology at the university...

 then of Lake Forest College
Lake Forest College
Lake Forest College, founded in 1857, is a private liberal arts college in Lake Forest, Illinois. The college has 1,500 students representing 47 states and 78 countries....

 (1889).

In 1879 Charles Sanders Peirce was hired as a philosophy instructor at Johns Hopkins University
Johns Hopkins University
The Johns Hopkins University, commonly referred to as Johns Hopkins, JHU, or simply Hopkins, is a private research university based in Baltimore, Maryland, United States...

. Although better known for his astronomical and philosophical work, Peirce also conducted what are perhaps the first American psychology experiments, on the subject of color vision, published in 1877 in the American Journal of Science (see Cadwallader, 1974). Peirce and his student Joseph Jastrow
Joseph Jastrow
Joseph Jastrow was an American psychologist, noted for inventions in experimental psychology, design of experiments, and psycho-physics. Jastrow was one of the first scientists to study the evolution of language, publishing an article on the topic in 1886...

 published "On Small Differences in Sensation" in the Memoirs of the National Academy of Sciences, in 1884. In 1882, Peirce was joined at Johns Hopkins by G. Stanley Hall
G. Stanley Hall
Granville Stanley Hall was a pioneering American psychologist and educator. His interests focused on childhood development and evolutionary theory...

, who opened the first American research laboratory devoted to experimental psychology in 1883. Peirce was forced out of his position by scandal and Hall was awarded the only professorship in philosophy at Johns Hopkins. In 1887 Hall founded the American Journal of Psychology
American Journal of Psychology
The American Journal of Psychology was the first English-language journal devoted primarily to experimental psychology . AJP was founded by the Johns Hopkins University psychologist Granville Stanley Hall in 1887...

, which published work primarily emanating from his own laboratory. In 1888 Hall left his Johns Hopkins professorship for the presidency of the newly founded Clark University
Clark University
Clark University is a private research university and liberal arts college in Worcester, Massachusetts.Founded in 1887, it is the oldest educational institution founded as an all-graduate university. Clark now also educates undergraduates...

, where he remained for the rest of his career.

Soon, experimental psychology laboratories were opened at the University of Pennsylvania
University of Pennsylvania
The University of Pennsylvania is a private, Ivy League university located in Philadelphia, Pennsylvania, United States. Penn is the fourth-oldest institution of higher education in the United States,Penn is the fourth-oldest using the founding dates claimed by each institution...

 (in 1887, by James McKeen Cattell
James McKeen Cattell
James McKeen Cattell , American psychologist, was the first professor of psychology in the United States at the University of Pennsylvania and long-time editor and publisher of scientific journals and publications, most notably the journal Science...

), Indiana University
Indiana University
Indiana University is a multi-campus public university system in the state of Indiana, United States. Indiana University has a combined student body of more than 100,000 students, including approximately 42,000 students enrolled at the Indiana University Bloomington campus and approximately 37,000...

 (1888, William Lowe Bryan
William Lowe Bryan
William Lowe Bryan was the 10th president of Indiana University, serving from 1902 to 1937. Having been born near Bloomington, Bryan graduated from IU with degrees in ancient classics and philosophy. His interests shifted toward psychology and Bryan went on to earn his Ph.D. in psychology from...

), the University of Wisconsin
University of Wisconsin–Madison
The University of Wisconsin–Madison is a public research university located in Madison, Wisconsin, United States. Founded in 1848, UW–Madison is the flagship campus of the University of Wisconsin System. It became a land-grant institution in 1866...

 (1888, Joseph Jastrow
Joseph Jastrow
Joseph Jastrow was an American psychologist, noted for inventions in experimental psychology, design of experiments, and psycho-physics. Jastrow was one of the first scientists to study the evolution of language, publishing an article on the topic in 1886...

), Clark University
Clark University
Clark University is a private research university and liberal arts college in Worcester, Massachusetts.Founded in 1887, it is the oldest educational institution founded as an all-graduate university. Clark now also educates undergraduates...

 (1889, Edmund Sanford), the McLean Asylum (1889, William Noyes
William Noyes
Rev. William Noyes was an English clergyman, Rector of Cholderton, Wiltshire, England. He died before 30 April 1622, in Cholderton. He was matriculated, age 20, at University College, Oxford, 15 November 1588, being admitted to the B.A. degree 31 May 1592. He was instituted rector of Cholderton in...

), and the University of Nebraska (1889, Harry Kirke Wolfe
Harry Kirke Wolfe
Harry Kirke Wolfe was a prominent early American psychologist.-Education:Wolfe earned undergraduate degree from the University of Nebraska in 1880, and his PhD under the supervision of Hermann Ebbinghaus and Wilhelm Wundt at the University of Leipzig in 1886...

).
However, it was Princeton University
Princeton University
Princeton University is a private research university located in Princeton, New Jersey, United States. The school is one of the eight universities of the Ivy League, and is one of the nine Colonial Colleges founded before the American Revolution....

's Eno Hall, built in 1924, that became the first university building in the United States to be devoted entirely to experimental psychology when it became the home of the university's Department of Psychology
Princeton University Department of Psychology
The Princeton University Department of Psychology, located in Green Hall, is an academic department of Princeton University on the corner of Washington St. and William St. in Princeton, New Jersey. For over a century, the department has been one of the most notable psychology departments in the...

.

In 1890, William James
William James
William James was a pioneering American psychologist and philosopher who was trained as a physician. He wrote influential books on the young science of psychology, educational psychology, psychology of religious experience and mysticism, and on the philosophy of pragmatism...

' Principles of Psychology
Principles of Psychology
The Principles of Psychology is a monumental text in the history of psychology, written by William James and published in 1890.There were four methods in James' psychology: analysis , introspection , experiment The Principles of Psychology is a monumental text in the history of psychology, written...

finally appeared, and rapidly became the most influential textbook in the history of American psychology. It laid many of the foundations for the sorts of questions that American psychologists would focus on for years to come. The book's chapters on consciousness, emotion, and habit were particularly agenda-setting.

One of those who felt the impact of James' Principles
Principles of Psychology
The Principles of Psychology is a monumental text in the history of psychology, written by William James and published in 1890.There were four methods in James' psychology: analysis , introspection , experiment The Principles of Psychology is a monumental text in the history of psychology, written...

was John Dewey
John Dewey
John Dewey was an American philosopher, psychologist and educational reformer whose ideas have been influential in education and social reform. Dewey was an important early developer of the philosophy of pragmatism and one of the founders of functional psychology...

, then professor of philosophy at the University of Michigan
University of Michigan
The University of Michigan is a public research university located in Ann Arbor, Michigan in the United States. It is the state's oldest university and the flagship campus of the University of Michigan...

. With his junior colleagues, James Hayden Tufts
James Hayden Tufts
James Hayden Tufts , an influential American philosopher, was a professor of the then newly founded Chicago University. Tufts was also a member of the Board of Arbitration, and the chairman of a committee of the social agencies of Chicago. The work Ethics in 1908 was a collaboration of Tufts and...

 (who founded the psychology laboratory at Michigan) and George Herbert Mead
George Herbert Mead
George Herbert Mead was an American philosopher, sociologist and psychologist, primarily affiliated with the University of Chicago, where he was one of several distinguished pragmatists. He is regarded as one of the founders of social psychology and the American sociological tradition in general.-...

, and his student James Rowland Angell
James Rowland Angell
James Rowland Angell was an American psychologist and educator. He served as the president of Yale University between 1921 and 1937...

, this group began to reformulate psychology, focusing more strongly on the social environment and on the activity of mind and behavior than the psychophysics-inspired physiological psychology of Wundt and his followers had heretofore. Tufts left Michigan for another junior position at the newly founded University of Chicago
University of Chicago
The University of Chicago is a private research university in Chicago, Illinois, USA. It was founded by the American Baptist Education Society with a donation from oil magnate and philanthropist John D. Rockefeller and incorporated in 1890...

 in 1892. A year later, the senior philosopher at Chicago resigned, and Tufts recommended to Chicago president William Rainey Harper
William Rainey Harper
William Rainey Harper was one of America's leading academics of the late 19th and early 20th centuries. Harper helped to organize the University of Chicago and Bradley University and served as the first President of both institutions.-Early life:Harper was born on July 26, 1856 in New Concord,...

 that Dewey be offered the position. After initial reluctance, Dewey was hired in 1894. Dewey soon filled out the department with his Michigan companions Mead and Angell. These four formed the core of the Chicago School of psychology.

In 1892, G. Stanley Hall
G. Stanley Hall
Granville Stanley Hall was a pioneering American psychologist and educator. His interests focused on childhood development and evolutionary theory...

 invited 30-some psychologists and philosophers to a meeting at Clark
Clark University
Clark University is a private research university and liberal arts college in Worcester, Massachusetts.Founded in 1887, it is the oldest educational institution founded as an all-graduate university. Clark now also educates undergraduates...

 with the purpose of founding a new American Psychological Association
American Psychological Association
The American Psychological Association is the largest scientific and professional organization of psychologists in the United States. It is the world's largest association of psychologists with around 154,000 members including scientists, educators, clinicians, consultants and students. The APA...

 (APA). (On the history of the APA, see Evans, Staudt Sexton, & Cadwallader, 1992.) The first annual meeting of the APA was held later that year, hosted by George Stuart Fullerton
George Stuart Fullerton
George Stuart Fullerton was an American philosopher and psychologist. He was the host of the first annual meeting of the American Psychological Association in 1892 at the University of Pennsylvania, and the APA's fifth president, in 1896....

 at the University of Pennsylvania
University of Pennsylvania
The University of Pennsylvania is a private, Ivy League university located in Philadelphia, Pennsylvania, United States. Penn is the fourth-oldest institution of higher education in the United States,Penn is the fourth-oldest using the founding dates claimed by each institution...

. Almost immediately tension arose between the experimentally and philosophically inclined members of the APA. Edward Bradford Titchener and Lightner Witmer
Lightner Witmer
Lightner Witmer Lightner Witmer is an American psychologist who is credited with the introduction of the term "Clinical Psychology." Witmer also founded the world's first "Psychological Clinic" in the United States at the University of Pennsylvania in 1896.Witmer contributed greatly to numerous...

 launched an attempt to either establish a separate "Section" for philosophical presentations, or to eject the philosophers altogether. After nearly a decade of debate a Western Philosophical Association was founded and held its first meeting in 1901 at the University of Nebraska. The following year (1902), an American Philosophical Association
American Philosophical Association
The American Philosophical Association is the main professional organization for philosophers in the United States. Founded in 1900, its mission is to promote the exchange of ideas among philosophers, to encourage creative and scholarly activity in philosophy, to facilitate the professional work...

 held its first meeting at Columbia University
Columbia University
Columbia University in the City of New York is a private, Ivy League university in Manhattan, New York City. Columbia is the oldest institution of higher learning in the state of New York, the fifth oldest in the United States, and one of the country's nine Colonial Colleges founded before the...

. These ultimately became the Central and Eastern Divisions of the modern American Philosophical Association
American Philosophical Association
The American Philosophical Association is the main professional organization for philosophers in the United States. Founded in 1900, its mission is to promote the exchange of ideas among philosophers, to encourage creative and scholarly activity in philosophy, to facilitate the professional work...

.

In 1894, a number of psychologists, unhappy with the parochial editorial policies of the American Journal of Psychology
American Journal of Psychology
The American Journal of Psychology was the first English-language journal devoted primarily to experimental psychology . AJP was founded by the Johns Hopkins University psychologist Granville Stanley Hall in 1887...

approached Hall about appointing an editorial board and opening the journal out to more psychologists not within Hall's immediate circle. Hall refused, so James McKeen Cattell
James McKeen Cattell
James McKeen Cattell , American psychologist, was the first professor of psychology in the United States at the University of Pennsylvania and long-time editor and publisher of scientific journals and publications, most notably the journal Science...

 (then of Columbia
Columbia University
Columbia University in the City of New York is a private, Ivy League university in Manhattan, New York City. Columbia is the oldest institution of higher learning in the state of New York, the fifth oldest in the United States, and one of the country's nine Colonial Colleges founded before the...

) and James Mark Baldwin
James Mark Baldwin
James Mark Baldwin was an American philosopher and psychologist who was educated at Princeton under the supervision of Scottish philosopher James McCosh and who was one of the founders of the Department of Psychology at the university...

 (then of Princeton
Princeton University
Princeton University is a private research university located in Princeton, New Jersey, United States. The school is one of the eight universities of the Ivy League, and is one of the nine Colonial Colleges founded before the American Revolution....

) co-founded a new journal, Psychological Review
Psychological Review
Psychological Review is a scientific journal that publishes articles on psychological theory. It was founded by Princeton psychologist James Mark Baldwin and Columbia psychologist James McKeen Cattell in 1894 as a publication vehicle for psychologists not connected with the Clark laboratory of G....

, which rapidly grew to become a major outlet for American psychological researchers.

Beginning in 1895, James Mark Baldwin
James Mark Baldwin
James Mark Baldwin was an American philosopher and psychologist who was educated at Princeton under the supervision of Scottish philosopher James McCosh and who was one of the founders of the Department of Psychology at the university...

 and Edward Bradford Titchener (Cornell
Cornell University
Cornell University is an Ivy League university located in Ithaca, New York, United States. It is a private land-grant university, receiving annual funding from the State of New York for certain educational missions...

) entered into an increasingly acrimonious dispute over the correct interpretation of some anomalous reaction time findings that had come from the Wundt laboratory (originally reported by Ludwig Lange
Ludwig Lange
Ludwig Lange was a German physicist.-Biography:He was the son of the philologist and archaeologist Ludwig Lange and his wife Adelheide Blume. He studied mathematics, physics, and also psychology, epistemology, ethics at the University of Leipzig and the University of Gießen from 1882-1885...

 and James McKeen Cattell
James McKeen Cattell
James McKeen Cattell , American psychologist, was the first professor of psychology in the United States at the University of Pennsylvania and long-time editor and publisher of scientific journals and publications, most notably the journal Science...

). In 1896, James Rowland Angell
James Rowland Angell
James Rowland Angell was an American psychologist and educator. He served as the president of Yale University between 1921 and 1937...

 and Addison W. Moore (Chicago) published a series of experiments in Psychological Review
Psychological Review
Psychological Review is a scientific journal that publishes articles on psychological theory. It was founded by Princeton psychologist James Mark Baldwin and Columbia psychologist James McKeen Cattell in 1894 as a publication vehicle for psychologists not connected with the Clark laboratory of G....

appearing to show that Baldwin was the more correct of the two. However, they interpreted their findings in light of John Dewey
John Dewey
John Dewey was an American philosopher, psychologist and educational reformer whose ideas have been influential in education and social reform. Dewey was an important early developer of the philosophy of pragmatism and one of the founders of functional psychology...

's new approach to psychology, which rejected the traditional stimulus-response understanding of the reflex arc in favor of a "circular" account in which what serves as "stimulus" and what as "response" depends on how one views the situation. The full position was laid out in Dewey's landmark article "The Reflex Arc Concept in Psychology" which also appeared in Psychological Review
Psychological Review
Psychological Review is a scientific journal that publishes articles on psychological theory. It was founded by Princeton psychologist James Mark Baldwin and Columbia psychologist James McKeen Cattell in 1894 as a publication vehicle for psychologists not connected with the Clark laboratory of G....

in 1896.

Titchener responded in Philosophical Review (1898, 1899) by distinguishing his austere "structural" approach to psychology from what he termed the Chicago group's more applied "functional" approach, and thus began the first major theoretical rift in American psychology between Structuralism
Structuralism (psychology)
Structuralism in psychology refers to the theory founded by Edward B. Titchener , with the goal to describe the structure of the mind in terms of the most primitive elements of mental experience...

 and Functionalism
Functional psychology
Functional psychology or functionalism refers to a general psychological philosophy that considers mental life and behavior in terms of active adaptation to the person's environment. As such, it provides the general basis for developing psychological theories not readily testable by controlled...

. The group at Columbia
Columbia University
Columbia University in the City of New York is a private, Ivy League university in Manhattan, New York City. Columbia is the oldest institution of higher learning in the state of New York, the fifth oldest in the United States, and one of the country's nine Colonial Colleges founded before the...

, led by James McKeen Cattell
James McKeen Cattell
James McKeen Cattell , American psychologist, was the first professor of psychology in the United States at the University of Pennsylvania and long-time editor and publisher of scientific journals and publications, most notably the journal Science...

, Edward L. Thorndike, and Robert S. Woodworth
Robert S. Woodworth
Robert Sessions Woodworth was an influential American academic psychologist of the first half of the twentieth century. A graduate of Harvard and Columbia, his textbook Psychology: A study of mental life, which appeared first in 1921, went through many editions and was the first introduction to...

, was often regarded as a second (after Chicago) "school" of American Functionalism (see, e.g., Heidbredder, 1933), although they never used that term themselves, because their research focused on the applied areas of mental testing, learning, and education. Dewey was elected president of the APA in 1899, while Titchener dropped his membership in the association. (In 1904, Titchener formed his own group, eventually known as the Society of Experimental Psychologists
Society of Experimental Psychologists
The Society of Experimental Psychologists , originally called the Society of Experimentalists, is an academic society for experimental psychologists. It was founded by Edward Bradford Titchener in 1904 to be an ongoing workshop in which members could visit labs, study apparatus, and hear and...

.) Jastrow
Joseph Jastrow
Joseph Jastrow was an American psychologist, noted for inventions in experimental psychology, design of experiments, and psycho-physics. Jastrow was one of the first scientists to study the evolution of language, publishing an article on the topic in 1886...

 promoted the functionalist approach in his APA presidential address of 1900, and Angell adopted Titchener's label explicitly in his influential textbook of 1904 and his APA presidential address of 1906. In reality, Structuralism was, more or less, confined to Titchener and his students. Functionalism, broadly speaking, with its more practical emphasis on action and application, better suited the American cultural "style" and, perhaps more important, was more popular among university trustees and private funding agencies.

Early French Psychology

In no small measure because of the conservatism of the reign of Louis Napoléon (president, 1848–1852; emperor as "Napoléon III", 1852–1870), academic philosophy in France through the middle part of the 19th century was controlled by members of the eclectic and spiritualist schools, led by figures such as Victor Cousin
Victor Cousin
Victor Cousin was a French philosopher. He was a proponent of Scottish Common Sense Realism and had an important influence on French educational policy.-Early life:...

 (1792–1867), Théodore Jouffroy (1796–1842), and Paul Janet
Paul Janet
Paul Janet was a French philosopher and writer.-Biography:Born in Paris, he became professor of moral philosophy at Bourges and Strasbourg , and of logic at the lycée Louis-le-Grand, Paris...

 (1823–1899). These were traditional metaphysical schools, opposed to regarding psychology as a natural science. With the ouster of Napoléon III after the débacle of the Franco-Prussian war, new paths, both political and intellectual, became possible. From the 1870 forward, a steadily increasing interest in positivist
Positivism
Positivism is a a view of scientific methods and a philosophical approach, theory, or system based on the view that, in the social as well as natural sciences, sensory experiences and their logical and mathematical treatment are together the exclusive source of all worthwhile information....

, materialist
Materialism
In philosophy, the theory of materialism holds that the only thing that exists is matter; that all things are composed of material and all phenomena are the result of material interactions. In other words, matter is the only substance...

, evolution
Evolution
Evolution is any change across successive generations in the heritable characteristics of biological populations. Evolutionary processes give rise to diversity at every level of biological organisation, including species, individual organisms and molecules such as DNA and proteins.Life on Earth...

ary, and deterministic
Determinism
Determinism is the general philosophical thesis that states that for everything that happens there are conditions such that, given them, nothing else could happen. There are many versions of this thesis. Each of them rests upon various alleged connections, and interdependencies of things and...

 approaches to psychology developed, influenced by, among others, the work of Hyppolyte Taine (1828–1893) (e.g., De L'Intelligence, 1870) and Théodule Ribot
Théodule-Armand Ribot
Théodule-Armand Ribot , French psychologist, was born at Guingamp, and was educated at the Lycée de St Brieuc.In 1856 he began to teach, and was admitted to the École Normale Supérieure in 1862...

 (1839–1916) (e.g., La Psychologie Anglaise Contemporaine, 1870).

In 1876, Ribot founded Revue Philosophique (the same year as Mind
Mind
The concept of mind is understood in many different ways by many different traditions, ranging from panpsychism and animism to traditional and organized religious views, as well as secular and materialist philosophies. Most agree that minds are constituted by conscious experience and intelligent...

was founded in Britain), which for the next generation would be virtually the only French outlet for the "new" psychology (Plas, 1997). Although not a working experimentalist himself, Ribot's many books were to have profound influence on the next generation of psychologists. These included especially his L'Hérédité Psychologique (1873) and La Psychologie Allemande Contemporaine (1879). In the 1880s, Ribot's interests turned to psychopathology, writing books on disorders of memory (1881), will (1883), and personality (1885), and where he attempted to bring to these topics the insights of general psychology. Although in 1881 he lost a Sorbonne
Sorbonne
The Sorbonne is an edifice of the Latin Quarter, in Paris, France, which has been the historical house of the former University of Paris...

 professorship in the History of Psychological Doctrines to traditionalist Jules Soury (1842–1915), from 1885 to 1889 he taught experimental psychology at the Sorbonne
Sorbonne
The Sorbonne is an edifice of the Latin Quarter, in Paris, France, which has been the historical house of the former University of Paris...

. In 1889 he was awarded a chair at the Collège de France
Collège de France
The Collège de France is a higher education and research establishment located in Paris, France, in the 5th arrondissement, or Latin Quarter, across the street from the historical campus of La Sorbonne at the intersection of Rue Saint-Jacques and Rue des Écoles...

 in Experimental and Comparative Psychology, which he held until 1896 (Nicolas, 2002).

France's primary psychological strength lay in the field of psychopathology. The chief neurologist at the Salpêtrière Hospital in Paris, Jean-Martin Charcot
Jean-Martin Charcot
Jean-Martin Charcot was a French neurologist and professor of anatomical pathology. He is known as "the founder of modern neurology" and is "associated with at least 15 medical eponyms", including Charcot-Marie-Tooth disease and amyotrophic lateral sclerosis...

 (1825–1893), had been using the recently revivied and renamed (see above) practice of hypnoisis to "experimentally" produce hysterical symptoms in some of his patients. Two of his students, Alfred Binet
Alfred Binet
Alfred Binet was a French psychologist who was the inventor of the first usable intelligence test, known at that time as the Binet test and today referred to as the IQ test. His principal goal was to identify students who needed special help in coping with the school curriculum...

 (1857–1911) and Pierre Janet
Pierre Janet
Pierre Marie Félix Janet was a pioneering French psychologist, philosopher and psychotherapist in the field of dissociation and traumatic memory....

 (1859–1947), adopted and expanded this practice in their own work.

In 1889, Binet and his colleague Henri Beaunis (1830–1921) co-founded, at the Sorbonne
Sorbonne
The Sorbonne is an edifice of the Latin Quarter, in Paris, France, which has been the historical house of the former University of Paris...

, the first experimental psychology laboratory in France. Just five years later, in 1894, Beaunis, Binet, and a third colleague, Victor Henri
Victor Henri
Victor Henri was a French physical chemist. He published over 500 papers in a variety of disciplines including biochemistry, physical chemistry, psychology and physiology....

 (1872–1940), co-founded the first French journal dedicated to experimental psychology, L'Année Psychologique. In the first years of the 20th century, Binet was requested by the French government to develop a method for the newly founded universal public education system to identify students who would require extra assistance to master the standardized curriculum. In response, with his collaborator Théodore Simon
Theodore Simon
Théodore Simon was a French psychologist and psychometrician. He co-created the Binet-Simon Intelligence Scale tests with Alfred Binet.- Biography :...

 (1873–1961), he developed the Binet-Simon Intelligence Test, first published in 1905 (revised in 1908 and 1911).
Although the test was used to effect in France, it would find its greatest success (and controversy) in the United States, where it was translated in by Henry H. Goddard
Henry H. Goddard
Henry Herbert Goddard was a prominent American psychologist and eugenicist in the early 20th century...

 (1866–1957), the director of the Training School for the Feebleminded in Vineland, New Jersey, and his assistant, Elizabeth Kite (a translation of the 1905 edition appeared in the Vineland Bulletin in 1908, but much better known was Kite's 1916 translation of the 1908 edition, which appeared in book form). The translated test was used by Goddard to advance his eugenics
Eugenics
Eugenics is the "applied science or the bio-social movement which advocates the use of practices aimed at improving the genetic composition of a population", usually referring to human populations. The origins of the concept of eugenics began with certain interpretations of Mendelian inheritance,...

 agenda with respect to those he deemed congenitally feeble-minded, especially immigrants from non-Western European countries. Binet's test was revised by Stanford
Stanford University
The Leland Stanford Junior University, commonly referred to as Stanford University or Stanford, is a private research university on an campus located near Palo Alto, California. It is situated in the northwestern Santa Clara Valley on the San Francisco Peninsula, approximately northwest of San...

 professor Lewis M. Terman (1877–1956) into the Stanford-Binet IQ test in 1916.
With Binet's death in 1911, the Sorbonne
Sorbonne
The Sorbonne is an edifice of the Latin Quarter, in Paris, France, which has been the historical house of the former University of Paris...

 laboratory and L'Année Psychologique fell to Henri Piéron (1881–1964). Piéron's orientation was more physiological that Binet's had been.

Pierre Janet
Pierre Janet
Pierre Marie Félix Janet was a pioneering French psychologist, philosopher and psychotherapist in the field of dissociation and traumatic memory....

 became the leading psychiatrist in France, being appointed to the Salpêtrière (1890–1894), the Sorbonne (1895–1920), and the Collège de France
Collège de France
The Collège de France is a higher education and research establishment located in Paris, France, in the 5th arrondissement, or Latin Quarter, across the street from the historical campus of La Sorbonne at the intersection of Rue Saint-Jacques and Rue des Écoles...

 (1902–1936). In 1904, he co-founded the Journale de Psychologie Normale et Pathologique with fellow Sorbonne
Sorbonne
The Sorbonne is an edifice of the Latin Quarter, in Paris, France, which has been the historical house of the former University of Paris...

 professor Georges Dumas
Georges Dumas
Georges Dumas was a French doctor and psychologist.His main work is The Treatise of Psychology . He wrote many articles and led the publication in two volumes of the treaty in which the main French psychologists of the time participate...

 (1866–1946), a student and faithful follower of Ribot. Whereas Janet's teacher, Charcot, had focused on the neurologial bases of hysteria, Janet was concerned to develop a scientific approach to psychopathology as a mental disorder. His theory that mental pathology results from conflict between unconscious and conscious parts of the mind, and that unconscious mental contents may emerge as symptoms with symbolic meanings led to a public priority dispute with Sigmund Freud
Sigmund Freud
Sigmund Freud , born Sigismund Schlomo Freud , was an Austrian neurologist who founded the discipline of psychoanalysis...

.

[Paul Broca [1824-1880] who was a french surgeon, supported the work of the German physiologist, Johannes Muller (1801-1858) whose work created the evolution of biology. What Broca did was, in 1861, he performed an autopsy on the brain of a man who had a stroke a few years ago prior to his death. Theman lost his ability to speak after his stroke. The part of the brain was the cereberal cortex on the left side of the brain. Broca then said that that was the region that affected the ability to speak. [Heth, C. Donald;Carlson,Neil R, Psycology the science of behaviour, Canadian fourth edition, 2010]

Early British Psychology

Although the British had the first scholarly journal dedicated to the topic of psychology – Mind
Mind (journal)
Mind is a British journal, currently published by Oxford University Press on behalf of the Mind Association, which deals with philosophy in the analytic tradition...

, founded in 1876 by Alexander Bain
Alexander Bain
Alexander Bain was a Scottish philosopher and educationalist in the British school of empiricism who was a prominent and innovative figure in the fields of psychology, linguistics, logic, moral philosophy and education reform...

 and edited by George Croom Robertson
George Croom Robertson
George Croom Robertson was a Scottish philosopher.He was born in Aberdeen. In 1857 he gained a bursary at Marischal College, and graduated MA in 1861, with the highest honours in classics and philosophy. In the same year he won a Fergusson scholarship of £100 a year for two years, which enabled...

 – it was quite a long while before experimental psychology developed there to challenge the strong tradition of "mental philosophy." The experimental reports that appeared in Mind in the first two decades of its existence were almost entirely authored by Americans, especially G. Stanley Hall
G. Stanley Hall
Granville Stanley Hall was a pioneering American psychologist and educator. His interests focused on childhood development and evolutionary theory...

 and his students (notably Henry Herbert Donaldson) and James McKeen Cattell
James McKeen Cattell
James McKeen Cattell , American psychologist, was the first professor of psychology in the United States at the University of Pennsylvania and long-time editor and publisher of scientific journals and publications, most notably the journal Science...

.

Francis Galton
Francis Galton
Sir Francis Galton /ˈfrɑːnsɪs ˈgɔːltn̩/ FRS , cousin of Douglas Strutt Galton, half-cousin of Charles Darwin, was an English Victorian polymath: anthropologist, eugenicist, tropical explorer, geographer, inventor, meteorologist, proto-geneticist, psychometrician, and statistician...

's (1822–1911) anthropometric laboratory opened in 1884. There people were tested on a wide variety of physical (e.g., strength of blow) and perceptual (e.g., visual acuity) attributes. In 1886 Galton was visited by James McKeen Cattell
James McKeen Cattell
James McKeen Cattell , American psychologist, was the first professor of psychology in the United States at the University of Pennsylvania and long-time editor and publisher of scientific journals and publications, most notably the journal Science...

 who would later adapt Galton's techniques in developing his own mental testing research program in the United States. Galton was not primarily a psychologist, however. The data he accumulated in the anthropometric laboratory primarily went toward supporting his case for eugenics
Eugenics
Eugenics is the "applied science or the bio-social movement which advocates the use of practices aimed at improving the genetic composition of a population", usually referring to human populations. The origins of the concept of eugenics began with certain interpretations of Mendelian inheritance,...

. To help interpret the mounds of data he accumulated, Galton developed a number of important statistical techniques, including the precursors to the scatterplot and the product-moment correlation coefficient (later perfected by Karl Pearson
Karl Pearson
Karl Pearson FRS was an influential English mathematician who has been credited for establishing the disciplineof mathematical statistics....

, 1857–1936).

Soon after, Charles Spearman
Charles Spearman
Charles Edward Spearman, FRS was an English psychologist known for work in statistics, as a pioneer of factor analysis, and for Spearman's rank correlation coefficient...

 (1863–1945) developed the correlation-based statistical procedure of factor analysis
Factor analysis
Factor analysis is a statistical method used to describe variability among observed, correlated variables in terms of a potentially lower number of unobserved, uncorrelated variables called factors. In other words, it is possible, for example, that variations in three or four observed variables...

 in the process of building a case for his two-factor theory of intelligence, published in 1901. Spearman believed that people have an inborn level of general intelligence
General intelligence
General intelligence may refer to:* general intelligence factor in psychology* Intelligence* strong AI, an artificial intelligence that matches or exceeds human intelligence...

 or g which can be crystallized into a specific skill in any of a number of narrow content area (s, or specific intelligence).

Laboratory psychology of the kind practiced in Germany and the United States was slow in coming to Britain. Although the philosopher James Ward
James Ward (psychologist)
James Ward was an English psychologist and philosopher. He was born in Kingston upon Hull, the eldest of nine children. His father was an unsuccessful merchant...

 (1843–1925) urged Cambridge University to establish a psychophysics laboratory from the mid-1870s forward, it was not until the 1891 that they put so much as £50 toward some basic apparatus (Bartlett, 1937). A laboratory was established through the assistance of the physiology department in 1897 and a lectureship in psychology was established which first went to W. H. R. Rivers (1864–1922). Soon Rivers was joined by C. S. Myers
Charles Samuel Myers
Charles Samuel Myers FRS was a significant English psychologist, who coined the term shell shock. He was co-founder of the British Psychological Society and the National Institute of Industrial Psychology....

 (1873–1946) and William McDougall
William McDougall (psychologist)
William McDougall FRS was an early twentieth century psychologist who spent the first part of his career in the United Kingdom and the latter part in the United States...

 (1871–1938). This group showed as much interest in anthropology as psychology, going with Alfred Cort Haddon
Alfred Cort Haddon
Alfred Cort Haddon, Sc.D., FRS, FRGS was an influential British anthropologist and ethnologist.Initially a biologist, who achieved his most notable fieldwork, with W.H.R. Rivers, C.G. Seligman, Sidney Ray, Anthony Wilkin on the Torres Strait Islands...

 (1855–1940) on the famed Torres Straits expedition of 1898.

In 1901 the Psychological Society was established (which renamed itself the British Psychological Society
British Psychological Society
The British Psychological Society is a representative body for psychologists and psychology in the United Kingdom. The BPS is also a Registered Charity and, along with advantages, this also imposes certain constraints on what the society can and cannot do...

 in 1906), and in 1904 Ward and Rivers co-founded the British Journal of Psychology.

Würzburg School

In 1896, one of Wundt's former Leipzig laboratory assistants, Oswald Külpe
Oswald Külpe
Oswald Külpe was one of the structural psychologists of the late 19th and early 20th century.-Biography:...

 (1862–1915), founded a new laboratory in Würzburg
University of Würzburg
The University of Würzburg is a university in Würzburg, Germany, founded in 1402. The university is a member of the distinguished Coimbra Group.-Name:...

. Külpe soon surrounded himself with a number of younger psychologists, most notably Narziß Ach (1871–1946), Karl Bühler (1879–1963), Ernst Dürr (1878–1913), Karl Marbe (1869–1953), and Henry Jackson Watt (1879–1925). Collectively, they developed a new approach to psychological experimentation that flew in the face of many of Wundt's restrictions. Wundt had drawn a distinction between the old philosophical style of self-observation (Selbstbeobachtung) in which one introspected for extended durations on higher thought processes and inner-perception (innere Wahrnehmung) in which one could be immediately aware of a momentary sensation, feeling, or image (Vorstellung). The former was declared to be impossible by Wundt, who argued that higher thought could not be studied experimentally through extended introspection, but only humanistically through Völkerpsychologie (folk psychology). Only the latter was a proper subject for experimentation.

The Würzburgers, by contrast, designed experiments in which the experimental subject was presented with a complex stimulus (e.g., a Nietzschean aphorism or a logical problem) and after processing it for a time (e.g., interpreting the aphorism or solving the problem), retrospectively reported to the experimenter all that had passed through his consciousness during the interval. In the process, the Würzburgers claimed to have discovered a number of new elements of consciousness (over and above Wundt's sensations, feelings, and images) including Bewußtseinslagen (conscious sets), Bewußtheiten (awarenesses), and Gedanken (thoughts). In the English-language literature, these are often collectively termed "imageless thoughts", and the debate between Wundt and the Würzburgers as the "imageless thought controversy."

Wundt referred to the Würzburgers' studies as "sham" experiments and criticized them vigorously. Wundt's most significant English student, Edward Bradford Titchener, then working at Cornell
Cornell University
Cornell University is an Ivy League university located in Ithaca, New York, United States. It is a private land-grant university, receiving annual funding from the State of New York for certain educational missions...

, intervened in the dispute, claiming to have conducted extended introspective studies in which he was able to resolve the Würzburgers imageless thoughts into sensations, feelings, and images. He thus, paradoxically, used a method of which Wundt did not approve in order to affirm Wundt's view of the situation (see Kusch, 1995; Kroker, 2003).

The imageless thought debate is often said to have been instrumental in undermining the legitimacy of all introspective methods in experimental psychology and, ultimately, in bringing about the behaviorist revolution in American psychology. It was not without its own delayed legacy, however. Herbert Simon
Herbert Simon
Herbert Alexander Simon was an American political scientist, economist, sociologist, and psychologist, and professor—most notably at Carnegie Mellon University—whose research ranged across the fields of cognitive psychology, cognitive science, computer science, public administration, economics,...

 (1981) cites the work of one Würzburg psychologist in particular, Otto Selz
Otto Selz
Otto Selz was a German psychologist from Munich, Bavaria, who formulated the first nonassociationist theory of thinking, in 1913. Selz used the method of introspection, but unlike his predecessors, his theory developed without the use of images and associations...

 (1881–1943), for having inspired him to develop his famous problem-solving computer algorithms (e.g., Logic Theorist
Logic Theorist
Logic Theorist is a computer program written in 1955 and 1956 by Allen Newell, Herbert Simon and J. C. Shaw. It was the first program deliberately engineered to mimic the problem solving skills of a human being and is called "the first artificial intelligence program." It would eventually prove 38...

 and General Problem Solver
General Problem Solver
General Problem Solver was a computer program created in 1959 by Herbert Simon, J.C. Shaw, and Allen Newell intended to work as a universal problem solver machine. Any formalized symbolic problem can be solved, in principle, by GPS. For instance: theorems proof, geometric problems and chess...

) and his "thinking out loud" method for protocol analysis
Protocol analysis
Protocol analysis is a psychological research method that elicits verbal reports from research participants. Protocol analysis is used to study thinking in cognitive psychology , cognitive science , and behavior analysis...

. In addition, Karl Popper
Karl Popper
Sir Karl Raimund Popper, CH FRS FBA was an Austro-British philosopher and a professor at the London School of Economics...

 studied psychology under Bühler and Selz, and appears to have brought some of their influence, unattributed, to his philosophy of science (Ter Hark, 2004).

Gestalt Psychology

(This section adapted from Green, 2000, by permission of the author.)

Whereas the Würzburgers debated with Wundt mainly on matters of method, another German movement, centered in Berlin, took issue with the widespread assumption that the aim of psychology should be to break consciousness down into putative basic elements. Instead, they argued that the psychological "whole" has priority and that the "parts" are defined by the structure of the whole, rather than vice versa. Thus, the school was named Gestalt
Gestalt psychology
Gestalt psychology or gestaltism is a theory of mind and brain of the Berlin School; the operational principle of gestalt psychology is that the brain is holistic, parallel, and analog, with self-organizing tendencies...

, a German term meaning approximately "form" or "configuration." It was led by Max Wertheimer
Max Wertheimer
- External links :* * * * *...

 (1880–1943), Wolfgang Köhler
Wolfgang Köhler
Wolfgang Köhler was a German psychologist and phenomenologist who, like Max Wertheimer, and Kurt Koffka, contributed to the creation of Gestalt psychology.-Early life:...

 (1887–1967), and Kurt Koffka
Kurt Koffka
Kurt Koffka was a German psychologist. He was born and educated in Berlin and earned his PhD there in 1909 as a student of Carl Stumpf...

 (1886–1941). Wertheimer had been a student of Austrian philosopher, Christian von Ehrenfels
Christian von Ehrenfels
Christian von Ehrenfels was an Austrian philosopher, and is known as one of the founders and precursors of Gestalt psychology.- Life :...

 (1859–1932), who claimed that in addition to the sensory elements of a perceived object, there is an extra element which, though in some sense derived from the organization of the standard sensory elements, is also to be regarded as being an element in its own right. He called this extra element Gestalt-qualität or "form-quality." For instance, when one hears a melody, one hears the notes plus something in addition to them which binds them together into a tune – the Gestalt-qualität. It is the presence of this Gestalt-qualität which, according to Von Ehrenfels, allows a tune to be transposed to a new key, using completely different notes, but still retain its identity. Wertheimer took the more radical line that "what is given me by the melody does not arise ... as a secondary process from the sum of the pieces as such. Instead, what takes place in each single part already depends upon what the whole is", (1925/1938). In other words, one hears the melody first and only then may perceptually divide it up into notes. Similarly in vision, one sees the form of the circle first – it is given "im-mediately" (i.e. its apprehension is not mediated by a process of part-summation). Only after this primary apprehension might one notice that it is made up of lines or dots or stars.

Gestalt-Theorie was officially initiated in 1912 in an article by Wertheimer on the phi-phenomenon; a perceptual illusion in which two stationary but alternately flashing lights appear to be a single light moving from one location to another. Contrary to popular opinion, his primary target was not behaviorism, as it was not yet a force in psychology. The aim of his criticism was, rather, the atomistic psychologies of Hermann von Helmholtz (1821–1894), Wilhelm Wundt (1832–1920), and other European psychologists of the time.

The two men who served as Wertheimer's subjects in the phi experiment were Köhler and Koffka. Köhler was an expert in physical acoustics, having studied under physicist Max Planck
Max Planck
Max Karl Ernst Ludwig Planck, ForMemRS, was a German physicist who actualized the quantum physics, initiating a revolution in natural science and philosophy. He is regarded as the founder of the quantum theory, for which he received the Nobel Prize in Physics in 1918.-Life and career:Planck came...

 (1858–1947), but had taken his degree in psychology under Carl Stumpf
Carl Stumpf
Carl Stumpf was a German philosopher and psychologist.Born in Wiesentheid, he studied with Franz Brentano and Hermann Lotze...

 (1848–1936). Koffka was also a student of Stumpf's, having studied movement phenomena and psychological aspects of rhythm. In 1917 Köhler (1917/1925) published the results of four years of research on learning in chimpanzees. Köhler showed, contrary to the claims of most other learning theorists, that animals can learn by "sudden insight" into the "structure" of a problem, over and above the associative and incremental manner of learning that Ivan Pavlov
Ivan Pavlov
Ivan Petrovich Pavlov was a famous Russian physiologist. Although he made significant contributions to psychology, he was not in fact a psychologist himself but was a mathematician and actually had strong distaste for the field....

 (1849–1936) and Edward Lee Thorndike (1874–1949) had demonstrated with dogs and cats, respectively.

The terms "structure" and "organization" were focal for the Gestalt psychologists. Stimuli were said to have a certain structure, to be organized in a certain way, and that it is to this structural organization, rather than to individual sensory elements, that the organism responds. When an animal is conditioned, it does not simply respond to the absolute properties of a stimulus, but to its properties relative to its surroundings. To use a favorite example of Köhler's, if conditioned to respond in a certain way to the lighter of two gray cards, the animal generalizes the relation between the two stimuli rather than the absolute properties of the conditioned stimulus: it will respond to the lighter of two cards in subsequent trials even if the darker card in the test trial is of the same intensity as the lighter one in the original training trials.

In 1921 Koffka published a Gestalt-oriented text on developmental psychology, Growth of the Mind. With the help of American psychologist Robert Ogden, Koffka introduced the Gestalt point of view to an American audience in 1922 by way of a paper in Psychological Bulletin
Psychological Bulletin
Psychological Bulletin is a peer-reviewed academic journal specializing in literature reviews. It was founded by Johns Hopkins psychologist James Mark Baldwin in 1904 immediately after he had bought out James McKeen Cattell's share of Psychological Review, which the two had founded ten years...

. It contains criticisms of then-current explanations of a number of problems of perception, and the alternatives offered by the Gestalt school. Koffka moved to the United States in 1924, eventually settling at Smith College
Smith College
Smith College is a private, independent women's liberal arts college located in Northampton, Massachusetts. It is the largest member of the Seven Sisters...

 in 1927. In 1935 Koffka published his Principles of Gestalt Psychology. This textbook laid out the Gestalt vision of the scientific enterprise as a whole. Science, he said, is not the simple accumulation of facts. What makes research scientific is the incorporation of facts into a theoretical structure. The goal of the Gestaltists was to integrate the facts of inanimate nature, life, and mind into a single scientific structure. This meant that science would have swallow not only what Koffka called the quantitative facts of physical science but the facts of two other "scientific categories": questions of order and questions of Sinn, a German word which has been variously translated as significance, value, and meaning. Without incorporating the meaning of experience and behavior, Koffka believed that science would doom itself to trivialities in its investigation of human beings.

Having survived the onslaught of the Nazis up to the mid-1930s (see Henle, 1978), all the core members of the Gestalt movement were forced out of Germany to the United States by 1935 (Henle, 1984). Köhler published another book, Dynamics in Psychology, in 1940 but thereafter the Gestalt movement suffered a series of setbacks. Koffka died in 1941 and Wertheimer in 1943. Wertheimer's long-awaited book on mathematical problem-solving, Productive Thinking was published posthumously in 1945 but Köhler was now left to guide the movement without his two long-time colleagues. (For more on the history of Gestalt psychology, see Ash, 1995.)

The Emergence of Behaviorism in America

As a result of the conjunction of a number of events in the early 20th century, behaviorism gradually emerged as the dominant school in American psychology. First among these was the increasing skepticism with which many viewed the concept of consciousness: although still considered to be the essential element separating psychology from physiology, its subjective nature and the unreliable introspective method it seemed to require, troubled many. William James
William James
William James was a pioneering American psychologist and philosopher who was trained as a physician. He wrote influential books on the young science of psychology, educational psychology, psychology of religious experience and mysticism, and on the philosophy of pragmatism...

' 1904 Journal of Philosophy... article "Does Consciousness Exist?", laid out the worries explicitly.

Second was the gradual rise of a rigorous animal psychology. In addition to Edward Lee Thorndike's work with cats in puzzle boxes in 1898, the start of research in which rats learn to navigate mazes was begun by Willard Small (1900, 1901 in American Journal of Psychology). Robert M. Yerkes's 1905 Journal of Philosophy... article "Animal Psychology and the Criteria of the Psychic" raised the general question of when one is entitled to attribute consciousness to an organism. The following few years saw the emergence of John Broadus Watson (1878–1959) as a major player, publishing his dissertation on the relation between neurological development and learning in the white rat (1907, Psychological Review Monograph Supplement; Carr & Watson, 1908, J. Comparative Neurology & Psychology). Another important rat study was published by Henry H. Donaldson (1908, J. Comparative Neurology & Psychology). The year 1909 saw the first English-language account of Ivan Pavlov
Ivan Pavlov
Ivan Petrovich Pavlov was a famous Russian physiologist. Although he made significant contributions to psychology, he was not in fact a psychologist himself but was a mathematician and actually had strong distaste for the field....

's studies of conditioning in dogs (Yerkes & Morgulis, 1909, Psychological Bulletin).

A third factor was the rise of Watson to a position of significant power within the psychological community. In 1908, Watson was offered a junior position at Johns Hopkins by James Mark Baldwin
James Mark Baldwin
James Mark Baldwin was an American philosopher and psychologist who was educated at Princeton under the supervision of Scottish philosopher James McCosh and who was one of the founders of the Department of Psychology at the university...

. In addition to heading the Johns Hopkins department, Baldwin was the editor of the influential journals, Psychological Review
Psychological Review
Psychological Review is a scientific journal that publishes articles on psychological theory. It was founded by Princeton psychologist James Mark Baldwin and Columbia psychologist James McKeen Cattell in 1894 as a publication vehicle for psychologists not connected with the Clark laboratory of G....

and Psychological Bulletin
Psychological Bulletin
Psychological Bulletin is a peer-reviewed academic journal specializing in literature reviews. It was founded by Johns Hopkins psychologist James Mark Baldwin in 1904 immediately after he had bought out James McKeen Cattell's share of Psychological Review, which the two had founded ten years...

. Only months after Watson's arrival, Baldwin was forced to resign his professorship due to scandal. Watson was suddenly made head of the department and editor of Baldwin's journals. He resolved to use these powerful tools to revolutionize psychology in the image of his own research. In 1913 he published in Psychological Review the article that is often called the "manifesto" of the behaviorist movement, "Psychology as the Behaviorist Views It." There he argued that psychology "is a purely objective experimental branch of natural science", "introspection forms no essential part of its methods..." and "The behaviorist... recognizes no dividing line between man and brute". The following year, 1914, his first textbook, Behavior went to press. Although behaviorism took some time to be accepted as a comprehensive approach (see Samelson, 1981), (in no small part because of the intervention of World War I), by the 1920s Watson's revolution was well underway. The central tenet of early behaviorism was that psychology should be a science of behavior, not of the mind, and rejected internal mental states such as beliefs, desires, or goals. Watson himself, however, was forced out of Johns Hopkins by scandal in 1920. Although he continued to publish during the 1920s, he eventually moved on to a career in advertising (see Coon, 1994).

Among the behaviorists who continued on, there were a number of disagreements about the best way to proceed. Neo-behaviorists such as Edward C. Tolman
Edward C. Tolman
Edward Chace Tolman was an American psychologist. He was most famous for his studies on behavioral psychology....

, Edwin Guthrie, Clark L. Hull
Clark L. Hull
Clark Leonard Hull was an influential American psychologist who sought to explain learning and motivation by scientific laws of behavior. Born in Akron, New York, Hull obtained bachelor's and master's degrees from the University of Michigan, and in 1918 a PhD from the University of...

, and B. F. Skinner
B. F. Skinner
Burrhus Frederic Skinner was an American behaviorist, author, inventor, baseball enthusiast, social philosopher and poet...

 debated issues such as (1) whether to reformulate the traditional psychological vocabulary in behavioral terms or discard it in favor of a wholly new scheme, (2) whether learning takes place all at once or gradually, (3) whether biological drives should be included in the new science in order to provide a "motivation" for behavior, and (4) to what degree any theoretical framework is required over and above the measured effects of reinforcement and punishment on learning. By the late 1950s, Skinner's formulation had become dominant, and it remains a part of the modern discipline under the rubric of Behavior Analysis.

Behaviorism was the ascendant experimental model for research in psychology for much of the 20th century, largely due to the creation and successful application (not least of which in advertising) of conditioning theories as scientific models of human behaviour.

Genevan School

In 1918, Jean Piaget
Jean Piaget
Jean Piaget was a French-speaking Swiss developmental psychologist and philosopher known for his epistemological studies with children. His theory of cognitive development and epistemological view are together called "genetic epistemology"....

 (1896–1980) turned away from his early training in Natural History
Natural History
Natural history is the scientific study of plants or animals.Natural History may also refer to:In science and medicine:* Natural History , Naturalis Historia, a 1st-century work by Pliny the Elder...

 and began post-doctoral work in psychoanalysis
Psychoanalysis
Psychoanalysis is a psychological theory developed in the late 19th and early 20th centuries by Austrian neurologist Sigmund Freud. Psychoanalysis has expanded, been criticized and developed in different directions, mostly by some of Freud's former students, such as Alfred Adler and Carl Gustav...

 in Zurich. In 1919, he moved to Paris to work at the Binet-Simon Lab. However, Binet had died in 1911 and Simon lived and worked in Rouen. His supervision therefore came (indirectly) from Pierre Janet
Pierre Janet
Pierre Marie Félix Janet was a pioneering French psychologist, philosopher and psychotherapist in the field of dissociation and traumatic memory....

, Binet's old rival and a professor at the Collège de France
Collège de France
The Collège de France is a higher education and research establishment located in Paris, France, in the 5th arrondissement, or Latin Quarter, across the street from the historical campus of La Sorbonne at the intersection of Rue Saint-Jacques and Rue des Écoles...

.

The job in Paris was relatively simple: to use the statistical techniques he had learned as a natural historian, studying molluscs, to standardize Cyril Burt
Cyril Burt
Sir Cyril Lodowic Burt was an English educational psychologist who made contributions to educational psychology and statistics....

's intelligence test for use with French children. Yet without direct supervision, he soon found a remedy to this boring work: exploring why children made the mistakes they did. Applying his early training in psychoanalytic interviewing, Piaget began to intervene directly with the children: "Why did you do that?" (etc.) It was from this that the ideas formalized in his later stage theory
Stage theory
Stage theories are based on the idea that elements in systems move through a pattern of distinct stages over time and that these stages can be described based on their distinguishing characteristics...

 first emerged.

In 1921, Piaget moved to Geneva to work with Edouard Claparède
Édouard Claparède
Édouard Claparède was a Swiss neurologist and child psychologist.Studies of science and medicine, later of psychology under Théodore Flournoy; 1897 MD from the University of Geneva; 1897-98 at La Salpêtrière hospital in Paris; 1901 foundation of the Archives de psychologie with Flournoy, which he...

 at the Rousseau Institute
Rousseau Institute
Rousseau Institute is a private school in Geneva, Switzerland. In 1912, Édouard Claparède created an institute to turn educational theory into a science...

.

In 1936, Piaget received his first honorary doctorate from Harvard.

In 1955, the International Center for Genetic Epistemology was founded: an interdisciplinary collaboration of theoreticians and scientists, devoted to the study of topics related to Piaget's theory.

In 1969, Piaget received the "distinguished scientific contributions" award from the American Psychological Association
American Psychological Association
The American Psychological Association is the largest scientific and professional organization of psychologists in the United States. It is the world's largest association of psychologists with around 154,000 members including scientists, educators, clinicians, consultants and students. The APA...

.

Cognitivism

Noam Chomsky
Noam Chomsky
Avram Noam Chomsky is an American linguist, philosopher, cognitive scientist, and activist. He is an Institute Professor and Professor in the Department of Linguistics & Philosophy at MIT, where he has worked for over 50 years. Chomsky has been described as the "father of modern linguistics" and...

's (1957) review of Skinner's book Verbal Behavior (that aimed to explain language acquisition
Language acquisition
Language acquisition is the process by which humans acquire the capacity to perceive, produce and use words to understand and communicate. This capacity involves the picking up of diverse capacities including syntax, phonetics, and an extensive vocabulary. This language might be vocal as with...

 in a behaviorist framework) is considered one of the major theoretical challenges to the type of radical behaviorism that Skinner taught. Chomsky showed that language could not be learned solely from the sort of operant conditioning that Skinner postulated. Chomsky's argument was that people could produce an infinite variety of sentences unique in structure and meaning and that these could not possibly be generated solely through experience of natural language. As an alternative, he concluded that there must be internal mental structures - states of mind of the sort that behaviorism rejected as illusory. Similarly, work by Albert Bandura
Albert Bandura
Albert Bandura is a psychologist and the David Starr Jordan Professor Emeritus of Social Science in Psychology at Stanford University...

 showed that children could learn by social observation
Social learning theory
-Theory:Social learning theory is derived from the work of Albert Bandura which proposed that social learning occurred through four main stages of imitation:* close contact* imitation of superiors* understanding of concepts* role model behavior...

, without any change in overt behaviour, and so must be accounted for by internal representations.

The rise of computer technology also promoted the metaphor of mental function as information processing
Information processing
Information processing is the change of information in any manner detectable by an observer. As such, it is a process which describes everything which happens in the universe, from the falling of a rock to the printing of a text file from a digital computer system...

. This, combined with a scientific approach to studying the mind, as well as a belief in internal mental states, led to the rise of cognitivism
Cognitivism (psychology)
In psychology, cognitivism is a theoretical framework for understanding the mind that came into usage in the 1950s. The movement was a response to behaviorism, which cognitivists said neglected to explain cognition...

 as the dominant model of the mind.

Links between brain
Brain
The brain is the center of the nervous system in all vertebrate and most invertebrate animals—only a few primitive invertebrates such as sponges, jellyfish, sea squirts and starfishes do not have one. It is located in the head, usually close to primary sensory apparatus such as vision, hearing,...

 and nervous system
Nervous system
The nervous system is an organ system containing a network of specialized cells called neurons that coordinate the actions of an animal and transmit signals between different parts of its body. In most animals the nervous system consists of two parts, central and peripheral. The central nervous...

 function were also becoming common, partly due to the experimental work of people like Charles Sherrington and Donald Hebb
Donald Olding Hebb
Donald Olding Hebb FRS was a Canadian psychologist who was influential in the area of neuropsychology, where he sought to understand how the function of neurons contributed to psychological processes such as learning...

, and partly due to studies of people with brain injury
Acquired brain injury
An acquired brain injury is brain damage caused by events after birth, rather than as part of a genetic or congenital disorder such as fetal alcohol syndrome, perinatal illness or perinatal hypoxia. ABI can result in cognitive, physical, emotional, or behavioural impairments that lead to permanent...

 (see cognitive neuropsychology
Cognitive neuropsychology
Cognitive neuropsychology is a branch of cognitive psychology that aims to understand how the structure and function of the brain relates to specific psychological processes. It places a particular emphasis on studying the cognitive effects of brain injury or neurological illness with a view to...

). With the development of technologies for accurately measuring brain function, neuropsychology
Neuropsychology
Neuropsychology studies the structure and function of the brain related to specific psychological processes and behaviors. The term neuropsychology has been applied to lesion studies in humans and animals. It has also been applied to efforts to record electrical activity from individual cells in...

 and cognitive neuroscience
Cognitive neuroscience
Cognitive neuroscience is an academic field concerned with the scientific study of biological substrates underlying cognition, with a specific focus on the neural substrates of mental processes. It addresses the questions of how psychological/cognitive functions are produced by the brain...

 have become some of the most active areas in contemporary psychology.

With the increasing involvement of other disciplines (such as philosophy
Philosophy
Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

, computer science
Computer science
Computer science or computing science is the study of the theoretical foundations of information and computation and of practical techniques for their implementation and application in computer systems...

, and neuroscience
Neuroscience
Neuroscience is the scientific study of the nervous system. Traditionally, neuroscience has been seen as a branch of biology. However, it is currently an interdisciplinary science that collaborates with other fields such as chemistry, computer science, engineering, linguistics, mathematics,...

) in the quest to understand the mind, the umbrella discipline of cognitive science
Cognitive science
Cognitive science is the interdisciplinary scientific study of mind and its processes. It examines what cognition is, what it does and how it works. It includes research on how information is processed , represented, and transformed in behaviour, nervous system or machine...

 has been created as a means of focusing such efforts in a constructive way.

Dissenting schools

Not all psychologists, however, have been content to follow what they perceive as mechanical models of the mind and human nature.

Carl Jung
Carl Jung
Carl Gustav Jung was a Swiss psychiatrist and the founder of Analytical Psychology. Jung is considered the first modern psychiatrist to view the human psyche as "by nature religious" and make it the focus of exploration. Jung is one of the best known researchers in the field of dream analysis and...

, a one-time follower and contemporary of Freud, was instrumental in introducing notions of spirituality into Freudian psychoanalysis (Freud had rejected religion as a mass delusion). The soul
Soul
A soul in certain spiritual, philosophical, and psychological traditions is the incorporeal essence of a person or living thing or object. Many philosophical and spiritual systems teach that humans have souls, and others teach that all living things and even inanimate objects have souls. The...

 is explored in-depth
Depth psychology
Historically, depth psychology, from a German term , was coined by Eugen Bleuler to refer to psychoanalytic approaches to therapy and research that take the unconscious into account. The term has come to refer to the ongoing development of theories and therapies pioneered by Pierre Janet, William...

 in the Neo-Jungian school of archetypal psychology
Archetypal psychology
Archetypal psychology is a vein of inquiry into the psyche inaugurated in the early 1900s by Carl Gustav Jung. Jung and his followers, as well as Mircea Eliade, imagined the psychology of the archetypes from studying anthropology and archeology reports of their times and weaving it into their...

.

Alfred Adler
Alfred Adler
Alfred Adler was an Austrian medical doctor, psychotherapist, and founder of the school of individual psychology. In collaboration with Sigmund Freud and a small group of Freud's colleagues, Adler was among the co-founders of the psychoanalytic movement as a core member of the Vienna...

, after a brief association with Freud's discussion circle, left to form his own discipline, called Individual (indivisible) Psychology. His influence on contemporary psychology has been considerable, with many approaches borrowing fragments of his theory. A recent rebirth of his legacy, Classical Adlerian Psychology
Classical Adlerian psychology
Classical Adlerian psychology is a values-based, fully integrated theory of personality, model of psychopathology, philosophy of living, strategy for preventative education, and technique of psychotherapy...

, combines Adler's original theory of personality, style of psychotherapy, and philosophy of living, with Abraham Maslow's vision of optimal functioning.

Humanistic psychology
Humanistic psychology
Humanistic psychology is a psychological perspective which rose to prominence in the mid-20th century, drawing on the work of early pioneers like Carl Rogers and the philosophies of existentialism and phenomenology...

 emerged in the 1950s and has continued as a reaction to positivist
Positivism
Positivism is a a view of scientific methods and a philosophical approach, theory, or system based on the view that, in the social as well as natural sciences, sensory experiences and their logical and mathematical treatment are together the exclusive source of all worthwhile information....

 and behaviorist approaches to the mind. It stresses a phenomenological view of human experience and seeks to understand human beings and their behavior by conducting qualitative research
Qualitative psychological research
In psychology, qualitative research has come to be defined as research whose findings are not arrived at by statistical or other quantitative procedures. Qualitative research is often said to be naturalistic. That is, its goal is to understand behaviour in a natural setting...

. The humanistic approach has its roots in existentialist
Existentialism
Existentialism is a term applied to a school of 19th- and 20th-century philosophers who, despite profound doctrinal differences, shared the belief that philosophical thinking begins with the human subject—not merely the thinking subject, but the acting, feeling, living human individual...

 and phenomenological philosophy and many humanist psychologists completely reject a scientific approach, arguing that trying to turn human experience into measurements strips it of all meaning and relevance to lived existence.

Some of the founding theorists behind this school of thought are Abraham Maslow
Abraham Maslow
Abraham Harold Maslow was an American professor of psychology at Brandeis University, Brooklyn College, New School for Social Research and Columbia University who created Maslow's hierarchy of needs...

, who formulated a hierarchy of human needs
Maslow's hierarchy of needs
Maslow's hierarchy of needs is a theory in psychology, proposed by Abraham Maslow in his 1943 paper A Theory of Human Motivation. Maslow subsequently extended the idea to include his observations of humans' innate curiosity...

; Carl Rogers
Carl Rogers
Carl Ransom Rogers was an influential American psychologist and among the founders of the humanistic approach to psychology...

, who created and developed client centred therapy; and Fritz Perls
Fritz Perls
Friedrich Salomon Perls , better known as Fritz Perls, was a noted German-born psychiatrist and psychotherapist of Jewish descent....

, who helped create and develop Gestalt therapy
Gestalt therapy
Gestalt therapy is an existential/experiential form of psychotherapy that emphasizes personal responsibility, and that focuses upon the individual's experience in the present moment, the therapist-client relationship, the environmental and social contexts of a person's life, and the self-regulating...

.

A further development of Humanistic psychology
Humanistic psychology
Humanistic psychology is a psychological perspective which rose to prominence in the mid-20th century, drawing on the work of early pioneers like Carl Rogers and the philosophies of existentialism and phenomenology...

 emerging in the 1970s was Transpersonal psychology
Transpersonal psychology
Transpersonal psychology is a form of psychology that studies the transpersonal, self-transcendent or spiritual aspects of the human experience....

, which studies the spiritual
Spirituality
Spirituality can refer to an ultimate or an alleged immaterial reality; an inner path enabling a person to discover the essence of his/her being; or the “deepest values and meanings by which people live.” Spiritual practices, including meditation, prayer and contemplation, are intended to develop...

 dimension of humanity, looking at the possibilities for development beyond the normal ego-boundaries.

Dr. Chad Ripperger, F.S.S.P.
Priestly Fraternity of St. Peter
The Priestly Fraternity of St. Peter is a traditionalist Catholic Society of Apostolic Life of priests and seminarians in good standing with the Holy See.-Canonical status:...

, Ph.D., advocates a return to the psychology of Thomas Aquinas
Thomas Aquinas
Thomas Aquinas, O.P. , also Thomas of Aquin or Aquino, was an Italian Dominican priest of the Catholic Church, and an immensely influential philosopher and theologian in the tradition of scholasticism, known as Doctor Angelicus, Doctor Communis, or Doctor Universalis...

 in his magnum opus The Science of Mental Health. Some of his reasons are that (1) modern psychology has a false, purely materialistic
Materialism
In philosophy, the theory of materialism holds that the only thing that exists is matter; that all things are composed of material and all phenomena are the result of material interactions. In other words, matter is the only substance...

 conception of man and (2) it has not come to a consensus about how to define mental illnesses or diagnosis them empirically.

Psychology & Alchemy

The earliest recorded practices of alchemy
Alchemy
Alchemy is an influential philosophical tradition whose early practitioners’ claims to profound powers were known from antiquity. The defining objectives of alchemy are varied; these include the creation of the fabled philosopher's stone possessing powers including the capability of turning base...

 come from Ancient China. These specifically take the form of Taoist writings that detail alchemical practices. The goal of this Chinese alchemy
Chinese alchemy
Chinese alchemy, a part of the larger tradition of Taoism, centers on the tradition of body-spirit cultivation that developed through the Chinese understandings of medicine and the body. These Chinese traditions were developed into a system of energy practices...

 was to purify the Mind, Body, and Soul through medicine and knowledge of the body. Much like Western alchemy
Alchemy
Alchemy is an influential philosophical tradition whose early practitioners’ claims to profound powers were known from antiquity. The defining objectives of alchemy are varied; these include the creation of the fabled philosopher's stone possessing powers including the capability of turning base...

 the goal of Chinese alchemy was to gain immortality through the consumption of particular elixirs. These practices would eventually evolve into a system of energy practices where the goal was to open the body up to Qi
Qi
In traditional Chinese culture, qì is an active principle forming part of any living thing. Qi is frequently translated as life energy, lifeforce, or energy flow. Qi is the central underlying principle in traditional Chinese medicine and martial arts...

 and balance the five elements (Chinese philosophy)
Five elements (Chinese philosophy)
The Wu Xing, also known as the Five Phases, the Five Agents, the Five Movements, and the Five Steps/Stages, are chiefly an ancient mnemonic device, in many traditional Chinese fields....

 within the body. The view that a person's well-being was based on having their inner elements balanced would later be adopted by Hippocrates
Hippocrates
Hippocrates of Cos or Hippokrates of Kos was an ancient Greek physician of the Age of Pericles , and is considered one of the most outstanding figures in the history of medicine...

 who would greatly influence the philosophy of Galen
Galen
Aelius Galenus or Claudius Galenus , better known as Galen of Pergamon , was a prominent Roman physician, surgeon and philosopher...

 which would dominate Western psychological thought for centuries.

The history of Western Alchemy allegedly begins in Egypt
Egypt
Egypt , officially the Arab Republic of Egypt, Arabic: , is a country mainly in North Africa, with the Sinai Peninsula forming a land bridge in Southwest Asia. Egypt is thus a transcontinental country, and a major power in Africa, the Mediterranean Basin, the Middle East and the Muslim world...

 with the teachings of Hermes Trismegistus
Hermes Trismegistus
Hermes Trismegistus is the eponymous author of the Hermetic Corpus, a sacred text belonging to the genre of divine revelation.-Origin and identity:...

. Occult history states that Hermes was the greatest teacher of all-time and that he is the one that brought the gift of writing to Man. He is also believed to have ascended to godhood in the form of Thoth
Thoth
Thoth was considered one of the more important deities of the Egyptian pantheon. In art, he was often depicted as a man with the head of an ibis or a baboon, animals sacred to him. His feminine counterpart was Seshat...

 and would go on to be the Greek god Hermes
Hermes
Hermes is the great messenger of the gods in Greek mythology and a guide to the Underworld. Hermes was born on Mount Kyllini in Arcadia. An Olympian god, he is also the patron of boundaries and of the travelers who cross them, of shepherds and cowherds, of the cunning of thieves, of orators and...

. At the core of Hermes’ teachings was that the entire Universe was created by the Mind. This theory would eventually emerge in the philosophy of Plato
Plato
Plato , was a Classical Greek philosopher, mathematician, student of Socrates, writer of philosophical dialogues, and founder of the Academy in Athens, the first institution of higher learning in the Western world. Along with his mentor, Socrates, and his student, Aristotle, Plato helped to lay the...

. Two other teachings credited to Hermes appear even earlier in the philosophy of Heraclitus
Heraclitus
Heraclitus of Ephesus was a pre-Socratic Greek philosopher, a native of the Greek city Ephesus, Ionia, on the coast of Asia Minor. He was of distinguished parentage. Little is known about his early life and education, but he regarded himself as self-taught and a pioneer of wisdom...

. Both of these thinkers proposed that the world is in constant motion and that opposites are not separate entities, but the same thing in different degrees. Hermes took these ideas further and applied them to the Mind. He claimed that a person's Mind was constantly changing between different degrees, but by exerting willpower one could stop this motion and eventually master it.

In Western history the most important of Hermes’ teachings were those regarding alchemy
Alchemy
Alchemy is an influential philosophical tradition whose early practitioners’ claims to profound powers were known from antiquity. The defining objectives of alchemy are varied; these include the creation of the fabled philosopher's stone possessing powers including the capability of turning base...

. It is claimed that Hermes not only gave writing to the Earth, but also the art of alchemy. The most basic teachings of which are said to have been given in the form of the Emerald Tablet
Emerald Tablet
The Emerald Tablet, also known as Smaragdine Table, Tabula Smaragdina, or The Secret of Hermes, is a text purporting to reveal the secret of the primordial substance and its transmutations...

. In the Western school of thought, alchemy was often portrayed with having the ultimate goal of creating the Philosopher's Stone
Philosopher's stone
The philosopher's stone is a legendary alchemical substance said to be capable of turning base metals into gold or silver. It was also sometimes believed to be an elixir of life, useful for rejuvenation and possibly for achieving immortality. For many centuries, it was the most sought-after goal...

, a substance that allegedly able to turn any mineral into gold as well as create an elixir that granted immortality. In the 13th century, Albertus Magnus
Albertus Magnus
Albertus Magnus, O.P. , also known as Albert the Great and Albert of Cologne, is a Catholic saint. He was a German Dominican friar and a bishop, who achieved fame for his comprehensive knowledge of and advocacy for the peaceful coexistence of science and religion. Those such as James A. Weisheipl...

 and Thomas Aquinas
Thomas Aquinas
Thomas Aquinas, O.P. , also Thomas of Aquin or Aquino, was an Italian Dominican priest of the Catholic Church, and an immensely influential philosopher and theologian in the tradition of scholasticism, known as Doctor Angelicus, Doctor Communis, or Doctor Universalis...

 contributed to laying the groundwork for the scientific method
Scientific method
Scientific method refers to a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge. To be termed scientific, a method of inquiry must be based on gathering empirical and measurable evidence subject to specific principles of...

.

After Magnus and Aquinas, the first true alchemist of the Middle Ages was Roger Bacon
Roger Bacon
Roger Bacon, O.F.M. , also known as Doctor Mirabilis , was an English philosopher and Franciscan friar who placed considerable emphasis on the study of nature through empirical methods...

. Bacon, a Franciscan
Franciscan
Most Franciscans are members of Roman Catholic religious orders founded by Saint Francis of Assisi. Besides Roman Catholic communities, there are also Old Catholic, Anglican, Lutheran, ecumenical and Non-denominational Franciscan communities....

 believed that knowledge could come from authority, reasoning, and experience. It was his firm belief however that knowledge was only effective if it came through experience. It is also believed that Bacon is one of the main perpetuators of the Philosopher's Stone story.

At this point alchemy was widely accepted by the Church as a way to learn more about theology. It was believed that if a process could turn minerals into gold, then a similar process could be applied to Man to purify its mind, body, and soul. After the writings of William of Ockham
William of Ockham
William of Ockham was an English Franciscan friar and scholastic philosopher, who is believed to have been born in Ockham, a small village in Surrey. He is considered to be one of the major figures of medieval thought and was at the centre of the major intellectual and political controversies of...

 alchemy began to fall into disfavor with the Church and the clergy was banned from studying it. This led to a long period where most of the philosophy of alchemy was neglected and instead it became more occult
Occult
The word occult comes from the Latin word occultus , referring to "knowledge of the hidden". In the medical sense it is used to refer to a structure or process that is hidden, e.g...

 in nature.

Alchemy remained in this state until the Renaissance with the work of Paracelsus
Paracelsus
Paracelsus was a German-Swiss Renaissance physician, botanist, alchemist, astrologer, and general occultist....

. Paracelsus believed that through observation and experimentation there was much to be learned about the human body. While accepting most of the neo-Platonic, Pythagorean, and Hermetical philosophies, Paracelsus rejected most of the magical writings that had been incorporated into alchemy. Through his research Paracelsus would go on to become the first major proponent for medicine. He believed that the human body grew sick because of an imbalance in chemicals and that balance was restored through various tinctures and elixirs.

Following Paracelsus’ work alchemy quickly faded away in favor of modern scientific practices. While alchemy had helped create many of the principles science would follow it was discarded as an esoteric pseudoscience
Pseudoscience
Pseudoscience is a claim, belief, or practice which is presented as scientific, but which does not adhere to a valid scientific method, lacks supporting evidence or plausibility, cannot be reliably tested, or otherwise lacks scientific status...

. Beginning in the 19th century and continuing throughout the 20th century alchemical writings would lose much of the jargon and esoterica that had shrouded them for centuries. The writings now reflected a more personal form of alchemy. The goal of alchemy was no longer to create the Philosopher's Stone, but to transform one's self into a perfect being. The belief was that one could change their Mind and by extension their Body and Soul through meditation and willpower.

Carl Jung would pick up on this belief and apply it to psychology in 1944 with the release of his book Psychology and Alchemy
Psychology and Alchemy
Psychology and Alchemy is the twelfth volume in the Princeton/Bollingen edition of the Collected Works of Carl Jung. In it Jung argues for a reevaluation of the symbolism of Alchemy as being intimately related to the psychoanalytical process...

. Jung argued that the symbols used by the alchemists of the Renaissance and Medieval Europe were not merely esoterica, but were in fact manifestations of the psyche. Jung would then go on to show how the Great Work of the alchemists was a symbol for the reintegration of the psyche in a person. This would lead Jung to conclude that spirituality was key in a person's mental well being.

Following Jung's research into alchemy it started gaining followers once more. One of the most important Hermeticists of the 20th century was Franz Bardon
Franz Bardon
Franz Bardon , born in Opava, Austrian Silesia, was both a stage magician and student and teacher of Hermetics. He was a member of the Czech hermetic society Universalia. During World War II Bardon was at one point held in a concentration camp for refusing to participate in Nazi Mysticism. Bardon...

. Bardon wrote three books on his view of the Universe and how one could learn to actualize their true potential as well as contact with beings from different planes of existence. Of these books the foundation of his entire metaphysics is Initiation Into Hermetics
Initiation into hermetics
Initiation into Hermetics is the title of the English translation of Franz Bardon's first of three volumes concerning self-realization in line with the Hermetic tradition.-Publication:...

. In this book Bardon takes the concept originally proposed by the Chinese and Hippocrates that the body is composed of elements and that these elements must be in harmony. More so than alchemists before him, Bardon placed a great emphasis on a person's Will. He claimed that not only could one learn to control the flow of their thoughts through willpower, but they could eventually change their personality and the world around them using willpower alone.

Currently alchemy relies heavily on the writings that Jung laid down, while there are still a few that follow the older traditions. Within the field of psychology there are findings that have begun to mirror those claims of the alchemists of the early 20th century, including Bardon. Throughout most of the 20th century it was believed that physical objects could not be changed through willpower. This belief is changing with research done by Jeffrey M. Schwartz
Jeffrey M. Schwartz
Jeffrey M. Schwartz, M.D. is an American psychiatrist and researcher in the field of neuroplasticity and its application to obsessive-compulsive disorder .-Biography:...

. In the late 80s and 90s Schwartz ran studies on patients suffering from OCD and found that by employing meditation and using great amounts of willpower these patients were able to change the way their brains were organized.

The Invisibility of Women in Psychology

At the turn of the 19th century Americans women were forced to conform to what society called “the feminine role.” This role starts at birth when little girls were raised to become caretakers of the home. The path to motherhood consisted of developing and perfecting domestic skills early on in life to marriage and finally motherhood. While women were left doing domestic work, men were out attending college and working outside of the home. The path to motherhood was not prescribed to every American woman it was only guaranteed to “northern white women of the middle and upper classes.”

The role of women did not change until the Civil War
Civil war
A civil war is a war between organized groups within the same nation state or republic, or, less commonly, between two countries created from a formerly-united nation state....

 when men were fighting in the front line and women were back home taking jobs that were left by men. The war opened a world of opportunity for women, from working in factories and farms to becoming nurses and doctors. Women were also able to become teachers in schools and colleges, which allowed them to gain experience. Once society saw women as more than mothers and domestic help, they were able to enhance their education by going to college. With the ever increasing amount of women in college studies showed a decline in marriage rates and motherhood which lead people to fear that the survival of the white Protestant middle class was in jeopardy. These fears lead to psychologist G. Stanley Hall
G. Stanley Hall
Granville Stanley Hall was a pioneering American psychologist and educator. His interests focused on childhood development and evolutionary theory...

’s observation that education was castrating women. Although there was a never ending growing fear and protest this did not stop the amount of women who pursued higher education.

When it comes to psychology the names that are often recognized are Sigmund Freud
Sigmund Freud
Sigmund Freud , born Sigismund Schlomo Freud , was an Austrian neurologist who founded the discipline of psychoanalysis...

, B.F. Skinner, and Jean Piaget
Jean Piaget
Jean Piaget was a French-speaking Swiss developmental psychologist and philosopher known for his epistemological studies with children. His theory of cognitive development and epistemological view are together called "genetic epistemology"....

 but very few recognize the works that women such as Mary Whiton Calkins
Mary Whiton Calkins
-Early life:Mary Whiton Calkins was born on March 30, 1863 in Hartford, Connecticut; she was the eldest of five children. She moved to Massachusetts in 1880 with her family to live for the rest of her life; this is also where she began her education. In 1882, Calkins entered into Smith College as...

, Christine Ladd-Franklin
Christine Ladd-Franklin
Christine Ladd-Franklin was the first American woman psychologist, logician, and mathematician.-Early Life and Early Education:...

, Virginia Staudt Sexton
Virginia Staudt Sexton
Virginia Mary Staudt was a psychologist who wrote numerous publications that are attributed to the history of American and international psychology.-Early Life and Education:...

, Jacqueline Jarrett Goodnow
Jacqueline Jarrett Goodnow
Jacqueline Jarrett Goodnow “has had a long and distinguished career as a cognitive and developmental psychologist. She was also a pioneer in the study of the influence of culture on thinking with her monograph on the use of Piagetian tasks with schooled and unschooled children in Hong Kong” -Early...

, Clara Mayo
Clara Mayo
Clara Alexandra Weiss was a social psychologist who conducted research into the processes of social perception and nonverbal communication with the primary purpose of understanding prejudice and stereotyping...

, and others have contributed to the development of psychology. Many psychology textbooks are dedicated to the contribution that men have had on psychology while neglecting the essence of women in psychology.

When taking a history of psychology course one learns about the persons behind the various theories of color vision. One classical theory of color vision is that of Ladd-Franklin, at first glance someone would assume that the theory was contributed by Mr. Ladd and Mr. Franklin but in fact it is a theory that was contributed by a Mrs. Christine Ladd-Franklin, a woman that hyphenated her surname after marriage. This is one of the many examples of how women are overlooked when studying the history of psychology.

See also

  • History of sociology
    History of sociology
    Sociology emerged from enlightenment thought, shortly after the French Revolution, as a positivist science of society. Its genesis owed to various key movements in the philosophy of science and the philosophy of knowledge. Social analysis in a broader sense, however, has origins in the common stock...

  • Applied psychology
    Applied psychology
    The basic premise of applied psychology is the use of psychological principles and theories to overcome problems in other areas, such as mental health, business management, education, health, product design, ergonomics, and law...

  • Danziger, Kurt
    Kurt Danziger
    Kurt Danziger is an academic whose work has focused on the history of psychology, particularly in the 20th century. His innovative contributions to this field have received widespread international recognition.-Biography:...

  • History of science
    History of science
    The history of science is the study of the historical development of human understandings of the natural world and the domains of the social sciences....

  • List of important publications in psychology
  • Psychology of art
    Psychology of art
    The psychology of art is an interdisciplinary field that studies the perception, cognition and characteristics of art and its production. For the use of art materials as a form of psychotherapy, see art therapy...

  • Timeline of psychology
    Timeline of psychology
    This article is a compiled timeline of psychology. A more general description of the development of the subject of psychology can be found in the history of psychology article...

  • Archives of the History of American Psychology
    Archives of the History of American Psychology
    The Archives of the History of American Psychology is a large collection of historical papers, instruments, films, photographs, and artifacts located at the University of Akron, in Akron, Ohio.-History:...


Scholarly Journals

For more information, including rejection rates and average publication lag, see this report

Scholarly Societies & Associations


E-Textbooks


Collections of Primary Source Texts


Collections of Secondary Scholarship on the History of Psychology


Websites of Physical Archives


Multimedia Resources

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