In this landmark volume, international experts provide insight into the experience and expression of pain in people with developmental disabilities from infancy through adulthood. No other book in the market today concentrates on the foundations, causes, and treatment of pain in people with developmental disabilities. In addition, the contributors address quality of life issues, quality health care issues, and best practice issues. An important focus of the book is non-verbal and behavioral expressions of pain that might be misinterpreted as misbehavior or psychological dysfunction. The book is intended for an academic as well as a practitioner audience, and discusses implications for research, policy, and practice.