The document discusses several theories of personality in organizational behavior, including: 1) Type theory which classifies personality based on body build (endomorph, ectomorph, mesomorph) and psychological types (introverts vs extroverts). 2) Trait theory which identifies enduring personality characteristics people differ on, such as the Big 5 model of extraversion, agreeableness, conscientiousness, emotional stability, and openness to experience. 3) Psychoanalytic theory proposed by Freud which suggests personality is influenced by unconscious forces and consists of the id, ego, and superego. 4) Social learning theory which emphasizes how individuals behave in given situations based on reinforcement and vicarious learning.