American Association on Intellectual and Developmental Disabilities

American non profit organization

infobox organization
| name = American Association on Intellectual and Developmental Disabilities
| status = 501(c)(3)
| tax id = 06 0636098
| logo = AAIDD logo. jpg
| employees = 15
| employees year = 2020
| volunteers = 20
| leader title = President
| leader name2 = Margaret Nygren and is the oldest professional association concerned with intellectual and developmental disabilities. AAIDD advocates for the equality, dignity, and human rights of people with intellectual and developmental disabilities, and for their full inclusion and participation in society. It is headquartered in Silver Spring, Maryland, a suburb of Washington, D. C.

The name of the association has changed five times in its history, reflecting the changes in thinking about the conditions known today as intellectual disabilities:
1876: Association of Medical Officers of American Institutions for Idiotic and Feebleminded Persons
1906: American Association for the Study of the Feebleminded
1933: American Association on Mental Deficiency
1987: American Association on Mental Retardation
2007: American Association on Intellectual and Developmental Disabilities

The AAIDD publishes books, evidenced based assessment tools, and three peer reviewed journals.

The AAIDD encourages a diversity of contributions from different traditions of inquiry and disciplines; all papers must meet the journals' criteria for rigor and peer review to be considered for publication. Established in 1896, American Journal on Intellectual and Developmental Disabilities (AJIDD) is a multidisciplinary journal for reporting original contributions of the highest quality on intellectual disability, its causes, treatment, and prevention. Like its parent organization, the journal has had multiple names through its history. It began as simply the journal of the proceedings and addresses from the association's annual conference, published under the corresponding name of the association. In 1939, it expanded beyond the annual conference report and became known as American Journal of Mental Deficiency. From 1987 until 2007, it was titled the American Journal of Mental Retardation, after which it was given its current title. It is focused primarily on scientific and medical studies and reviews. Established in 1963, Intellectual and Developmental Disabilities (IDD) is a journal of current policy, best practices, and new perspectives on intellectual and developmental disabilities. IDD provides a forum for the dissemination of rigorously reviewed, actionable information and transformative concepts, with a focus on praxis over theory. Established in 2013, Inclusion is a multidisciplinary journal that provides a forum for the presentation and discussion of evidence based interventions and strategies that promote the full inclusion of those with intellectual and developmental disabilities in society at large.

The AAIDD publishes essential books and tools for professionals and others in the field of intellectual and developmental disabilities. The organization's most well known book is its definition manual, first published in 1910 and now in its 12th edition: Intellectual Disability: Definition, Diagnosis, Classification, and Systems of Support. It also publishes Supports Intensity Scales (SIS), a group of assessment tools that evaluate the practical support requirements of people with intellectual disabilities. It is available in a child version (SIS C) and an adult version (SIS A, 2nd ed.). Both versions assess someone's needed level of support, but adjust for differences in age related expectations. For example, a child would be expected to have a full time, live in caretaker (i. e. a parent or guardian) while for an adult that would qualify as extra support. The assessment is done through semi structured interviews with those who can give insight to the daily life of the person being assessed, up to and including the person themselves when appropriate. The SIS measures support needs in multiple areas of daily life, including housing, education, employment, medical services, and social activities. Assessors rate different categories according to the frequency of support (e. g., none, at least once a month), amount of support (e. g., none, less than 30 minutes), and type of support (e. g., monitoring, verbal gesturing) that a person requires. The overall Supports Intensity Level is determined based on the Total Support Needs Index, which is a standard score generated from the individual ratings.

As the oldest professional organization in the field of intellectual and developmental disabilities, AAIDD offers educational opportunities to the global disability community, including an annual conference, webinars, and professional research exchanges. The association's YouTube channel provides short educational videos on topics related to intellectual and developmental disabilities.