Journal of Autism and Developmental Disorders

, Volume 33, Issue 3, pp 319–328

Autism Diagnostic Interview-Revised and the Childhood Autism Rating Scale: Convergence and Discrepancy in Diagnosing Autism


    • State Diagnostic and Counseling Center
  • Páll Magnússon
    • Department of Child and Adolescent PsychiatryNational University Hospital
  • Jakob Smári
    • Department of Social SciencesUniversity of Iceland
  • Solveig Sigurdardóttir
    • State Diagnostic and Counseling Center

DOI: 10.1023/A:1024410702242

Cite this article as:
Saemundsen, E., Magnússon, P., Smári, J. et al. J Autism Dev Disord (2003) 33: 319. doi:10.1023/A:1024410702242


The agreement between the Autism Diagnostic Interview–Revised (ADI-R) and the Childhood Autism Rating Scale (CARS) was investigated in the diagnostic assessment of 54 children aged 22–114 months referred for possible autism. The observed agreement between the two systems was 66.7% (Cohen's kappa = .40) when the ADI-R definition for autism was applied (i.e., scores reaching cutoff in three domains on the ADI-R), but increased considerably with less stringent criteria; that is, scores reaching cutoffs in two domains and in one domain on the ADI-R. As predicted, the CARS identified more cases of autism than the ADI-R. Children classified as autistic according to both instruments had significantly lower IQ/DQ and more severe autistic symptomatology than those classified with the CARS only.

AutismdiagnosisAutism Diagnostic Interview–RevisedChildhood Autism Rating Scale

Copyright information

© Plenum Publishing Corporation 2003