Personality
Personality is any person's collection of interrelated behavioral, cognitive, and emotional patterns that comprise a person’s unique adjustment to life. These interrelated patterns are relatively stable, but can change over long time periods, driven by experiences and maturational processes, especially the adoption of social roles as worker or parent. Personality differences are the strongest predictors of virtually all key life outcomes, from academic and work and relationship success and satisfaction to mental and somatic health and well-being and longevity.
Although there is no consensus definition of personality, most theories focus on motivation and psychological interactions with one's environment. Trait-based personality theories, such as those defined by Raymond Cattell, define personality as traits that predict an individual's behavior.