Trait Theory:This is a psychological framework that focuses on identifying, describing, and measuring individual differences in behavioral predispositions.
Self-Report Inventory: This is a type of psychological test often used in personality assessment where individuals answer questions about their own behaviors and feelings.
Raymond Cattell:He was a British-American psychologist known for his exploration of areas like the theory of fluid and crystallized intelligence and the development of the 16PF Personality Test.