Adolescence (12 — 19 years)

Freud

Genital Stage

- sexuality directed towards another person

Erikson

Identity versus Role Confusion

- integrated sense of who one is

Intimacy versus Isolation

- meaningful relationships

Piaget

Formal Operational Intelligence

- systematic abstract thinking

Vygotsky

Age of Peer Activity

- with other adolescents

Egan

Philosophic Understanding

- systematic theoretical thinking, made possible by social institutions