This new edition of Psychology has undergone a major revision with thousands of new references and dozens of new topics added. New co-author Linda Brannon has worked closely with Lester Lefton to rewrite, reorganize, and provide a stronger focus on gender and diversity issues, as well as a new emphasis on the process of research. Four major themes are recurrent in the book: the integration of diversity, the importance of biological/evolutionary topics, the complex relationship between nature and nurture, and the importance of readers' ability to apply and critique basic psychological principles within their own lives. For anyone interested in psychology.