In this integrative volume, foremost experts present cutting-edge work on the nature and treatment of autism. Covering theory, research, and the development of new hypotheses and models, the book provides a balance between depth and breadth by focusing on questions most central to the field. Psychological and biological models of autism are presented in Part I. In Part II, contributors describe a range of clinical intervention methods and discuss topics related to diagnosis. The volume has been designed to be accessible and informative to a broad audience, including clinicians, researchers, and students.