Intellectual Disability is the currently preferred term for the condition historically referred to as Mental Retardation. Three decades ago, the American Association on Mental Retardation (AAMR; now known as the American Association on Intellectual and Developmental Disabilities or AAIDD) proposed a definition of Mental Retardation that emphasized intelligence but also considered two other important factors – adaptive behavior and the time of occurrence of the disabling condition: “Mental Retardation refers to significantly subaverage general intellectual functioning existing concurrently with deficits in adaptive behavior and manifested during the developmental period” (Grossman, 1983, p. 1).
A change has occurred since the time of that definition, including a shift in terminology from Mental Retardation to Intellectual Disability (ID) as well as the designation of who...
The writing of this paper was supported, in part, by NIH training grant HD-07184.
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