AP Psychology — explaining and classifying psychological disorders

Topics 5.3 and 5.4 are the largest block of content in the final unit of AP Psychology, and the exam tests them in a particular way: a short invented case is described, and you are asked which category, symptom type or explanatory model fits it. The wrong options are nearly always a neighboring category: bipolar I instead of bipolar II, obsessive-compulsive disorder instead of obsessive-compulsive personality disorder, a specific phobia instead of posttraumatic stress disorder. Getting these right depends on knowing the one feature that separates each pair.

This material starts where the course starts: how psychologists decide that a pattern of behavior is a disorder at all, by weighing dysfunction, distress and deviation from social norms together rather than treating unusual behavior as illness. It then covers how the behavioral, psychodynamic, humanistic, cognitive, evolutionary, sociocultural and biological perspectives each explain disorders, and the two interaction models the course names: the biopsychosocial model and the diathesis-stress model.

The categories follow the selection the course framework lists: neurodevelopmental disorders (attention-deficit/hyperactivity disorder and autism spectrum disorder), the schizophrenia spectrum with the difference between positive and negative symptoms, depressive and bipolar disorders, anxiety disorders including panic disorder, obsessive-compulsive and related disorders, dissociative disorders, posttraumatic stress disorder, anorexia and bulimia nervosa, and the three clusters of personality disorders.

Every case is invented and described in full within the question. The questions ask how a discipline classifies, never what a person should do, and nothing here is a basis for judging anyone's mental health. Diagnosis requires specialized training, which the material says plainly.

Four formats are offered. The quiz has twelve single-answer questions, each built on one of the distinctions above, with explanations that say why the neighboring category does not fit. The flashcards drill categories, symptoms and models. The oral exam opens with the three factors used to define a disorder and continues one question at a time through perspectives, models and categories, ending with brief feedback on which distinctions held and which slipped. The written work is a printable sheet of eight open questions, from contrasting positive and negative symptoms to explaining the diathesis-stress model with an invented twin comparison.

The content follows the published AP Psychology course framework for Unit 5. It does not reproduce diagnostic manual criteria and gives no personal advice.

• Explain how dysfunction, distress and deviation are weighed together to identify a disorder
• Match explanations of disorders to the psychological perspectives and to the biopsychosocial and diathesis-stress models
• Distinguish positive from negative symptoms of schizophrenia and bipolar I from bipolar II
• Tell apart panic disorder, specific phobia, obsessive-compulsive disorder and obsessive-compulsive personality disorder
• Place dissociative, trauma-related, eating and personality disorders in the correct category or cluster

Practice material written by Zestly, based on the College Board AP Psychology Course and Exam Description (effective fall 2024, with the October 2025 clarifications), Unit 5, topics 5.3 Explaining and Classifying Psychological Disorders and 5.4 Selection of Categories of Psychological Disorders. The list of disorder categories follows that framework's selection; no diagnostic manual text is reproduced. All cases are invented.