This authoritative handbook is the reference of choice for researchers and students of personality. Leading authorities describe the most important theoretical approaches in personality and review the state of the science in five broad content areas: biological bases; development; self and social processes; cognitive and motivational processes; and emotion, adjustment, and health. Within each area, chapters present innovative ideas, findings, research designs, and measurement approaches. Areas of integration and consensus are discussed, as are key questions and controversies still facing the field.