This book provides new information on why nonsuicidal self-injury (NSSI) occurs and what evidence-based assessment methods and treatments are available. Drawing on the historical, biological, cognitive, behavioral, and interpersonal literature, contributors address questions concerning definition and classification, prevalence, associated factors, and ways to help. The book's readership includes psychologists, psychiatrists, social workers, nurses, therapists, and graduate students. Nock is professor of social sciences and director of the Laboratory for Clinical and Developmental Research in the Department of Psychology at Harvard University. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)