Introduction to Child and Adolescent Psychopathology provides a comprehensive and practical guide to understanding mental disorders and their evidence-based treatments. Using a developmental psychopathology approach, author Robert Weis opens each chapter with a description of the disorder, including the complete DSM-5-TR criteria, prevalence, and associated features. The causes of each disorder are then analyzed through biological, psychological, and social–cultural lenses, followed by a discussion of evidence-based treatments, using criteria established by the Society of Clinical Child and Adolescent Psychology and the American Academy of Child and Adolescent Psychiatry. The Fifth Edition includes updated research throughout, with special attention to developments since the COVID-19 pandemic, including an increase in digital media use, and it features case studies and pedagogy designed to help students understand and retain the material.