Trait Theory:A psychological framework which suggests that personalities are made up of broad traits or dispositions that tend to lead to consistent behaviors.
Big Five Personality Traits:These include openness, conscientiousness, extraversion, agreeableness, and neuroticism - often remembered by the acronym OCEAN.
Psychoanalytic Theory:A theory developed by Freud suggesting that personality is formed through conflicts among three fundamental structures of the human mind - id, ego and superego.