Adolescence is a transitional stage of physical and mental human development
Human development (biology)
Human development is the process of growing to maturity. In biological terms, this entails growth from a one-celled zygote to an adult human being.- Biological development:...

 generally occurring between puberty
Puberty is the process of physical changes by which a child's body matures into an adult body capable of reproduction, as initiated by hormonal signals from the brain to the gonads; the ovaries in a girl, the testes in a boy...

 and legal adult
An adult is a human being or living organism that is of relatively mature age, typically associated with sexual maturity and the attainment of reproductive age....

hood (age of majority
Age of majority
The age of majority is the threshold of adulthood as it is conceptualized in law. It is the chronological moment when minors cease to legally be considered children and assume control over their persons, actions, and decisions, thereby terminating the legal control and legal responsibilities of...

), but largely characterized as beginning and ending with the teenage stage. According to Erik Erikson
Erik Erikson
Erik Erikson was a Danish-German-American developmental psychologist and psychoanalyst known for his theory on social development of human beings. He may be most famous for coining the phrase identity crisis. His son, Kai T...

's stages of human development
Erikson's stages of psychosocial development
Erikson's stages of psychosocial development as articulated by Erik Erikson explain eight stages through which a healthily developing human should pass from infancy to late adulthood. In each stage the person confronts, and hopefully masters, new challenges. Each stage builds on the successful...

, for example, a young adult
Young adult (psychology)
A young adult, according to Erik Erikson's stages of human development, is generally a person between the age of 20 - 40, whereas an adolescent is a person between the age of 13 - 19, although definitions and opinions vary. The young adult stage in human development precedes middle adulthood. A...

 is generally a person between the ages of 20 and 40, whereas an adolescent is a person between the ages of 13 and 19. Historically, puberty has been heavily associated with teenagers and the onset of adolescent development.