The five-factor theory is concered with the measurement and structure of personality
Employs factoranalytic approach–mathematical procedures capable of sifting personality traits from mountains of test data
Costa was interested in individual differences and the nature of personality increased greatly in the stimulating intellectual environment
Neuroticism and Extraversion then discovered Openness to Experience immediately • Added Agreeableness and Conscientiousness when they published NEO-PI in 1985
Adults—in the absence of catastrophic illnesses, such as Alzheimer’s—tend to maintain the same personality structure as they grow older
Neuroticism, Extraversion, Openness to Experience, Agreeableness, and Conscientiousness. 240-items
Revised NEO-PI. The big five and its facets
personality traits are bipolar and follow a bell-shaped distribution, where most people score near the middle of each trait
