American Association on Intellectual and Developmental Disabilities

The American Association on Intellectual and Developmental Disabilities (AAIDD) is the oldest and largest interdisciplinary organization of professionals and others concerned about intellectual and developmental disabilities. Founded in 1876, AAIDD promotes progressive policies, sound research, effective practices, and universal human rights for people with intellectual and developmental disabilities. The organization is globally recognized for its leadership in defining and classifying intellectual disability, notably through its publication of the "Intellectual Disability: Definition, Classification, and Systems of Supports" manual. AAIDD provides professional development, peer-reviewed journals, and advocacy to enhance the quality of life for individuals with disabilities. It serves a diverse membership of researchers, clinicians, practitioners, and educators across the globe, playing a critical role in policy development and the establishment of standards for support systems.