Describes the Autism Diagnostic Interview-Revised (ADI-R), a revision of the Autism Diagnostic Interview, a semistructured, investigator-based interview for caregivers of children and adults for whom autism or pervasive developmental disorders is a possible diagnosis. The revised interview has been reorganized, shortened, modified to be appropriate for children with mental ages from about 18 months into adulthood and linked to ICD-10 and DSM-IV criteria. Psychometric data are presented for a sample of preschool children.
We acknowledge the help of all the parents who participated in these interviews and of Sharon Storoschuk, Joyce Magill, Cathy Mulloy, and Lyn Anderson-Cook who conducted interviews. Support was provided by Public Health Service Grant #7 R01 MH46865-03, Training in RESH Diagnoses of Autism and Spectrum Disorder 7-T35-MH 19726-02 and the Alberta Heritage Fund for Medical Research, first author and the MRC Child Psychiatry Unit.