This is a valuable book for supervisory level personnel who can establish policy and who will be in a position to influence others who work directly with the persons with special needs. Far too often behavioral principles—sound enough in themselves—are applied without taking individual needs and tastes into account. Such programs either fail to change the behavior or they draw counselor and patient—teacher and student—parent and child into deeper conflict. describes the effective and humane use of behavioral methods to teach social and cognitive skills to the severely and profoundly mentally retarded. This introduction and guidebook outlines general principles and offers many case studies to illustrate the concepts under discussion.