PERSONALITY P ersonality is def i ned as the characteristic sets of behaviors, cognitions, and emotional patterns that evolve from biological and environmental factors… While there is no generally agreed upon def i nition of personality, most theories focus on motivation and psychological interactions with one’s environment… Trait-based personality theories, such as those def i ned by Raymond Cattell, def i ne personality as the traits that predict a person’s behavior. On the other hand, more behaviorally-based approaches def i ne personality through learningandhabits.Nevertheless,mosttheoriesviewpersonality as relatively stable.
T h e study of the psychology of personality, called personality psychology, attempts to explain the tendencies that underlie dif f erences in behavior. Many approaches have been taken on to study personality, including biological, cognitive, learning and trait-based theories, as well as psychodynamic, and humanistic approaches. Personality psychology is divided among the f i rst theorists, with a few inf l uential theories being posited by Sigmund Freud, Alfred Adler, Gordon Allport, Hans Eysenck,AbrahamMaslow,andCarlRogers.T h ebiologicalbasis of personality is the theory that anatomical structures located in the brain contribute to personality traits. T h is stems from neuropsychology, which studies how the structure of the brain relates to various psychological processes and behaviors. For instance, in human beings, the frontal lobes are responsible for 1