Personality: Theory and Research, 9th Edition introduces the primary theoretical perspectives that guide contemporary research on personality and individual differences, while also reviewing a wide range of contemporary scientific findings on personality. Throughout the text, emphasis is placed on how theory and research inform one another. Rich case material shows how the theoretical conceptions yield insight into the lives of individual persons. In keeping with the long tradition of this text, the new edition treats each theoretical approach objectively and even-handedly, encouraging readers to weigh the evidence and to formulate their own conclusions. Revisions in the new edition are designed to presents this complex scientific field in an highly engaging, accessible, and readable manner.