Case studies in a comprehensive range of mental disorders and treatments, supported therapy session notes and transcripts, and the latest research Case Studies in Psychological Disorders and Treatment provides developmental histories essential to appropriate diagnosis and treatment of mental disorders, presenting 23 distinct case studies and applying theoretical perspectives and empirical research findings to real-world clinical situations. Each study describes the clinical problem, demonstrates the formulation and implementation of a treatment plan, and discusses evidence regarding potential causes and prevalence. Cases range from psychotic and personality disorders, including schizophrenia and bipolar disorder, to those concerning child development and aging such as attention-deficit and hyperactivity disorder. The book covers potentially controversial contemporary subjects including gender dysphoria and hoarding disorder. Limitations and benefits of various treatment plans are discussed, and alternative treatment methods including medication, electroconvulsive therapy, psychosurgery, and augmented cognitive-behavioral approaches are reviewed. This revised and updated Twelfth Edition includes updated discussion sections reflecting current research literature, revised language and framing of concepts to recognize evolving cultural context, brief video overviews of featured disorders in the enhanced eText, and more. Case Studies in Psychological Disorders and Treatment includes information on: Autism spectrum disorder, substance-induced psychotic disorder, opioid use disorder, and major depressive disorderPanic disorder, agoraphobia, generalized anxiety disorder, obsessive compulsive disorder, and posttraumatic stress disorder from rape traumaDissociative identity disorder, somatic symptom disorder, anorexia and bulimia nervosa, nightmare disorder, and isolated sleep paralysisFemale orgasmic disorder, premature ejaculation, oppositional defiant disorder, alcohol use disorder, paranoid and borderline personality disorders, and psychopathy Presenting an updated, honest, and unbiased view of the subject, the Twelfth Edition of Case Studies in Psychological Disorders and Treatment is an essential learning resource for all mental health professionals and undergraduate and graduate students studying mental disorders.