This new edited volume offers a step-by-step approach to diagnosis, giving practicing psychologists and graduate trainees around the world the essential information to apply the ICD-11 diagnostic requirements for mental, behavioral, and neurodevelopmental disorders as a basis for high quality, evidence-informed care.

The World Health Assembly adopted the Eleventh Revision of the International Classification of Diseases (ICD-11) in 2019 as the basis for global health information and reporting. This ground-breaking volume published by the American Psychological Association in partnership with the International Union of Psychological Science provides a detailed guide for the clinical implementation of the ICD-11 diagnostic classification system by psychologists and other health professionals. Each chapter describes a psychological approach to a different diagnostic area, operationalized as a conceptually driven, person-oriented, “biopsychosociocultural” formulation that integrates pertinent history, behavior, symptoms, phenomenology, and functioning.

As laid out by the book's expert contributors, this volume enables practitioners to establish a differential diagnosis using the ICD-11 as the principal classification framework. Each chapter discusses how psychologists conceive of diagnosis as well as focal consideration of impairment, functioning, assessment, the developmental approach, terminology, research methodologies, and other key aspects of psychological practice.

The book is designed to complement, rather than replace, the World Health Organization’s Clinical Descriptions and Diagnostic Requirement for ICD-11 Mental, Behavioural and Neurodevelopmental Disorders. Written to be responsive to the unique context of psychological practice, including consideration of regional, linguistic, and cultural factors, A Psychological Approach to Diagnosis is the first comprehensive training resource on WHO’s ICD-11 classification of mental, behavioral and neurodevelopmental disorders.

Geoffrey M. Reed, PhD, Professor of Medical Psychology, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
 
Pierre L.-J. Ritchie, PhD, Professor Emeritus, School of Psychology, University of Ottawa, Canada
 
Andreas Maercker, PhD MD, Professor of Psychology, Department of Psychology, Division of Psychopathology and Clinical Intervention, University of Zurich, Switzerland
 
Tahilia Rebello, PhD, Assistant Professor of Clinical Psychology, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA