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About Us Directory Daniel N. Klein, PhD

Dan N. Klein, PhD

State University of New York Distinguished Professor
Department of Psychology, Stony Brook University

Daniel N. Klein, PhD, is a State University of New York Distinguished Professor in the Department of Psychology at Stony Brook University. He received his undergraduate degree from Brandeis University and his doctorate in clinical psychology from the University at Buffalo.

Dr. Klein’s research focuses on the classification, development, intergenerational transmission, course, and treatment of depression and related disorders in children, adolescents, and adults. His work on chronic depression influenced the classification of depression in the last two editions of the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders. In addition, he was a principal investigator on several pioneering clinical trials demonstrating the efficacy of pharmacotherapy, psychotherapy, and their combination for treating chronic depression. For the last 20 years, his work has focused on the long-term outcomes of early childhood psychopathology and on identifying early emotional, behavioral, and neurophysiological risk factors for the development of depressive and anxiety disorders in adolescence and young adulthood.

Dr. Klein has published close to 600 articles and book chapters. His work has been continuously supported by the National Institute of Mental Health since 1984. He has served as president of the Society for a Science of Clinical Psychology (SSCP) and the Society for Research in Psychopathology (SRP). Dr. Klein received awards for mentorship from SSCP and SRP as well as career scientific contributions awards from SSCP, SRP, and the Society for Clinical Psychology (APA Division 12).