Autism Diagnostic Interview, Revised (ADI-R)

ADI-R is a 93-item interview that helps diagnose autism in children and adults with a mental age over 18 months. In most cases, the interview lasts for 1.5 to 2.5 hours, including scoring. The interview is standardized and administered by a trained clinician to parents or caregivers of the child with suspected autism.

The interview includes items within three areas, including:

  1. Communication
  2. Reciprocal social interactions
  3. Restrictive, repetitive, and stereotyped behaviors

The interview also determines the onset of abnormal behaviors, to determine if the child meets age of onset criteria.


Kim SH, Hus V, and Lord C. "Autism Diagnostic Interview-Revised." SpringerReference. 12 Dec 2012 15:50.