Research & Diagnostic Instruments
ADI-R Diagnostic Instrument
Autism Diagnostic Interview-Revised (ADI-R)
Ann Le Couteur, M.B.B.S., Catherine Lord, Ph.D., and Michael Rutter, M.D., F.R.S.
The Autism Diagnostic Interview-Revised (ADI-R; Le Couteur, Lord, & Rutter, 2003; Rutter, Le Couteur & Lord, 2003) is a semi-structured diagnostic interview to assess behaviors related to autism or autistic spectrum disorders (see also Lord et al., 1994). Based on DSM-IV and ICD-10 criteria for autism and pervasive developmental disorders, the ADI-R contains questions about children's early development, communication, social interaction, and patterns of behaviors. The ADI-R yields scores for current behaviors and history and results in cutoff scores indicating presence of autism. A classification of autism is given when scores in all 3 domains of communication, social interaction, and patterns of behavior meet or exceed the specified cutoffs, and onset of the disorder is evident by age 3.
Inter-rater and test-retest reliability, as well as internal validity, have been demonstrated for the ADI-R. The ADI-R and its previous version, the ADI, have been widely used in research and in academic centers for over 15 years.
The ADI-R typically takes between 90 minutes to 3 hours and is administered by an experienced clinician to the caregiver(s) of an individual with autism. The ADI-R should be used by professionals who are very familiar with autistic spectrum disorders and who have experience in clinical interviewing and assessment of individuals with autism and other developmental disabilities. The examiner's clinical skills and experience with the ADI-R are crucial to administration. If you are a clinician and do not need the ADI-R for research purposes, it will be possible for you to purchase a manual, protocols, and training videotapes from Western Psychological Services and use them in your clinical practice. However, if you have any plans to use the instruments in research, you must attend the ADI-R 2 1/2 Day Research Training and establish reliability with CADB or with another designated group. If you are a clinician, you are welcome, but not required, to come to the research workshop. It is highly recommended that you purchase and view the ADI-R training videotapes before beginning to use the ADI-R. Requirements of your profession determine if you should administer the instrument if you are using it for clinical purposes only.
Individuals interested in purchasing ADI-R materials should contact Western Psychological Services. Dr. Catherine Lord, along with the other authors of the ADI-R, receives royalties when people purchase ADI-R materials.
More information on ADI-R Training Workshops.