This document summarizes chapter 1 of an AP psychology case study textbook. It discusses how each chapter will present a case report and diagnosis using the DSM-5. It covers the stigma of labeling psychological disorders and the 5 criteria used. The chapter also discusses the history of treatment for psychologically disturbed individuals and the importance of clinical research and evidence-based treatments. Key terms like client, patient, and clinician are defined, and the diagnostic process is outlined. Cultural factors like cultural bound syndromes and cultural formulations are also highlighted.