This document summarizes chapters from a psychology textbook. Chapter 13 discusses several perspectives on personality, including Sigmund Freud's psychodynamic theory involving the id, ego, and superego. It also describes neo-Freudian theorists like Jung, Adler, and Horney and their modifications to Freud's ideas. Modern psychodynamic theory provides some support for defense mechanisms and the unconscious mind. Behaviorism and social cognitive theory view personality as learned habits and the interaction between environment, cognition, and behavior.