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  2. Adolescence - Wikipedia

    en.wikipedia.org/wiki/Adolescence

    The formal study of adolescent psychology began with the publication of G. Stanley Hall's Adolescence in 1904. Hall, who was the first president of the American Psychological Association, defined adolescence to be the period of life from ages 14 to 24, and viewed it primarily as a time of internal turmoil and upheaval (sturm und drang). [90]

  3. Child development - Wikipedia

    en.wikipedia.org/wiki/Child_development

    Adolescence is the stage of life that typically starts around the major onset of puberty, with markers such as menarche and spermarche, typically occurring at 12–14 years of age. [3] It has been defined as ages 10 to 24 years old by the World Happiness Report WHR. [ 1 ]

  4. Emerging adulthood and early adulthood - Wikipedia

    en.wikipedia.org/wiki/Emerging_adulthood_and...

    Emerging adulthood and adolescence differ significantly with regard to puberty and hormonal development. [53] While there is considerable overlap between the onset of puberty and the developmental stage referred to as adolescence, there are considerably fewer hormonal and physical changes taking place in individuals between the ages of 18 and 25.

  5. Developmental psychology - Wikipedia

    en.wikipedia.org/wiki/Developmental_psychology

    Adolescence is the period of life between the onset of puberty and the full commitment to an adult social role, such as worker, parent, and/or citizen. It is the period known for the formation of personal and social identity (see Erik Erikson ) and the discovery of moral purpose (see William Damon ).

  6. Child development stages - Wikipedia

    en.wikipedia.org/wiki/Child_development_stages

    Child development stages are the theoretical milestones of child development, some of which are asserted in nativist theories. This article discusses the most widely accepted developmental stages in children.

  7. Young adult - Wikipedia

    en.wikipedia.org/wiki/Young_adult

    In medicine and the social sciences, a young adult is generally a person in the years following adolescence, sometimes with some overlap. [1] Definitions and opinions on what qualifies as a young adult vary, with works such as Erik Erikson's stages of human development significantly influencing the definition of the term; generally, the term is often used to refer to adults in approximately ...

  8. Puberty - Wikipedia

    en.wikipedia.org/wiki/Puberty

    Five Tanner stages of male genitalia; The Adolescent Period. In males, testicular enlargement is the first physical manifestation of puberty (and is termed gonadarche). [30] Testes in prepubertal males change little in size from about 1 year of age to the onset of puberty, averaging about 2–3 cm in length and about 1.5–2 cm in width.

  9. Transitional age youth - Wikipedia

    en.wikipedia.org/wiki/Transitional_age_youth

    For example, adolescent exposure to marijuana may increase the risk of psychosis in vulnerable youths. [19] A growing body of literature implicates Adverse Childhood Experiences , including physical, sexual, and emotional abuse, in a broad range of negative health consequences including depression, anxiety, suicidality, and cardiovascular and ...