High-Yield (TM) Behavioral Science, Fourth Edition presents a concise review of the behavioral science material tested on the USMLE Step 1. The High-Yield (TM) outline format, with tables, diagrams, photographs, and images to clarify important material, provides a concentrated, efficient review for both course exams and the USMLE. Patient Snapshots present clinical scenarios and pose specific questions. Annotated answers and explanations appear at the end of each chapter. This edition is thoroughly updated, consistent with DSM-IV-TR, and reorganized into six major sections: The Life Cycle; Biological and Psychological Bases of Behavior; Psychopathology; Social Behavior; The Practice of Medicine; and Epidemiology and Statistics.