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PRACTICE PARAMETER FOR THE ASSESSMENT AND TREATMENT OF CHILDREN ... - AACAP

evidence made it clear that autism was highly distinctive. By 1980, autism was officially recognized as a diagnosis in DSM-III. 3. Under DSM-IV TR, the diagnosis of autism required disturbances in each of three domains: (i) social relatedness, (ii) communication/play, and (iii) restricted interests and activities with onset by age three years. 4