Psychoanalytic Theories:

Psychoanalytic theories of development began with the work of Sigmund Freud, who believed that early childhood experiences had a lasting effect on the course of development. Freud’s work was enormously influential and inspired other psychologists to expand upon his work and develop theories of their own. One of the most famous theorists influenced by Freud was Erik Erikson, whose eight-stage theory of human development remains one of the best-known psychological theories.