Christian Dettweiler was an innovator in the field of graphology

Graphology

Graphology is the pseudoscientific study and analysis of handwriting, especially in relation to human psychology. In the medical field, it can be used to refer to the study of handwriting as an aid in diagnosis and tracking of diseases of the brain and nervous system...

.

Dettweiler was the author of over 40 articles and books. He was a student of Pharmacy

Pharmacy

Pharmacy is the health profession that links the health sciences with the chemical sciences and it is charged with ensuring the safe and effective use of pharmaceutical drugs...

 and in 1942 received a PhD

PHD

PHD may refer to:*Ph.D., a doctorate of philosophy*Ph.D. , a 1980s British group*PHD finger, a protein sequence*PHD Mountain Software, an outdoor clothing and equipment company*PhD Docbook renderer, an XML renderer...

 in Botany

Botany

Botany, plant science, or plant biology is a branch of biology that involves the scientific study of plant life. Traditionally, botany also included the study of fungi, algae and viruses...

 (Plant Physiology

Plant physiology

Plant physiology is a subdiscipline of botany concerned with the functioning, or physiology, of plants. Closely related fields include plant morphology , plant ecology , phytochemistry , cell biology, and molecular biology.Fundamental processes such as photosynthesis, respiration, plant nutrition,...

) and was a Scientific Assistant at the Universities of Rostock

University of Rostock

The University of Rostock is the university of the city Rostock, in the German state of Mecklenburg-Vorpommern.Founded in 1419, it is the oldest and largest university in continental northern Europe and the Baltic Sea area...

 and Stuttgart

University of Stuttgart

The University of Stuttgart is a university located in Stuttgart, Germany. It was founded in 1829 and is organized in 10 faculties....

. From a basis in Klosinski's "Dynamic Handwriting Analysis" he developed his own graphological direction, based on psycho-analysis integrating the theories of Balint

Balint

Balinţ is a commune in Timiş County, Romania. It is composed of four villages: Balinţ, Bodo, Fădimac and Târgovişte....

 and Winnicott

Donald Winnicott

Donald Woods Winnicott was an English paediatrician and psychoanalyst who was especially influential in the field of object relations theory. He was a leading member of the British Independent Group of the British Psychoanalytic Society, and a close associate of Marion Milner...

, Otto Kernberg and Heinz Kohut

Heinz Kohut

Heinz Kohut was an Austrian-born American psychoanalyst best known for his development of Self psychology, an influential school of thought within psychodynamic/psychoanalytic theory which helped transform the modern practice of analytic and dynamic treatment approaches.-Early life:Kohut was born...

. Dr Dettweiler founded the International Association for Dynamic and Clinical Psychology of Handwriting in 1986, organising five conventions in 1986, 1988, 1990, 1992 and 1994.