Autism Diagnostic Observation Schedule-Second Edition (ADOS-2)

The Autism Diagnostic Observation Schedule-Second Edition (ADOS-2) is a standardized activity-based instrument for diagnosing autism spectrum disorders in children and adults. Trained clinician examiners utilize the standardized ADOS activities and questions depending on the observed individual’s age and communication level.  


Autism spectrum disorders
< 3 Years,
1st Grade,
2nd Grade,
3rd Grade,
4th Grade,
5th Grade,
6th Grade,
7th Grade,
8th Grade,
9th Grade,
10th Grade,
11th Grade,
12th Grade,
Post secondary
Other Language/s
Czech, Danish, Dutch, Finnish, French, German, Italian, Norwegian, & Swedish

Administration Information

40-60 minutes

Access and Use


Prices vary for different kits, see details on the publisher’s website


Western Psychological Services 1-800-648-8857

Open Access
Use in Research

Pierce, K., Gazestani, V. H., Bacon, E., Barnes, C. C., Cha, D., Nalabolu, S., ... & Courchesne, E. (2019). Evaluation of the diagnostic stability of the early autism spectrum disorder phenotype in the general population starting at 12 months. JAMA pediatrics, 173(6), 578-587. 

Yap, C. X., Henders, A. K., Alvares, G. A., Wood, D. L., Krause, L., Tyson, G. W., ... & Gratten, J. (2021). Autism-related dietary preferences mediate autism-gut microbiome associations. Cell, 184(24), 5916-5931.


Computer scoring,
Manual scoring
Psychometric References

Lord, C., Risi, S., Lambrecht, L., Cook, E.H., Jr., Leventhal, B.L., DiLavore, P.C., Pickles, A., & Rutter, M. (2000). Autism Diagnostic Observation Schedule – Generic: A standard measure of social and communication deficits associated with the spectrum of autism. Journal of Autism & Developmental Disorders, 30(3), 205-223.

Lord, C., Rutter, M., DiLavore, P.C., Risi, S., Gotham, K., & Biship, S.L. (2012). Autism Diagnostic Observation Schedule, Second Edition; Part I: Modules 1-4. Los Angeles, CA: Western Psychological Services.

Lord, C., Luyster, R.J., Gotham, K., & Guthrie, W. (2012). Autism Diagnostic Observation Schedule, Second Edition; Part II: Toddler Module. Los Angeles, CA: Western Psychological Services.

Psychometric Considerations

Psychometrics is the science of psychological assessment. A primary goal of EdInstruments is to provide information on crucial psychometric topics including Validity and Reliability – essential concepts of evaluation, which indicate how well an instrument measures a construct - as well as additional properties that are worthy of consideration when selecting an instrument of measurement.

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