Intellectual Disability: Definition, Classification, and Systems of Supports is the eleventh updated edition of the American Association of Intellectual and Developmental Disabilities' reference manual of definitions. Assembled by a committee of eighteen practicing experts and grounded in research spanning the past seven years, critiques of the tenth edition, and feedback from the field, Intellectual Disability covers the diagnosis and classification of intellectual disability, systems of supports (including prevention) for those with intellectual disability, implications that the latest research has for public policy, education, and support provider organizations, and much more. An excellent, up-to-date reference enthusiastically recommended for college library collections and the resource shelves of aspiring and practicing psychologists.