This document discusses personality and how it relates to athletes. It defines personality and notes that athletes and non-athletes possess different personality characteristics. Hollander's model of personality is described as having three levels: the psychological core which is a person's basic and stable personality traits, typical responses which are how a person usually responds to their environment, and role-related behaviors which are how a person responds in specific social situations. The document also discusses factors that determine personality such as heredity, environment, and their interaction, as well as theories of personality like psychodynamic theory and social learning theory. Various methods for measuring personality in athletes are also outlined.