This document discusses theories of personality development, including psychoanalytic theory and psychosocial theory. It provides an overview of Freud's psychoanalytic theory, including the id, ego, superego, and psychosexual stages of development. It also summarizes Erik Erikson's psychosocial theory and the eight stages of development from infancy to adulthood. Key factors influencing personality like heredity, physiology, psychology, and social factors are also defined.