This document discusses personality in three paragraphs. It defines personality as the sum total of ways an individual reacts and interacts with others. It then lists the three main determinants of personality as heredity, environmental factors, and situational conditions. The second paragraph discusses heredity factors in more detail, including genes, twin studies, and personality change over time. The third paragraph introduces two frameworks for describing personality traits: the Myers-Briggs Type Indicator and the Big Five Model.