Journal of Autism and Developmental Disorders

, Volume 35, Issue 5, pp 625–634

Multi-site Study of the Childhood Autism Rating Scale (CARS) in Five Clinical Groups of Young Children


    • TRE-ADDThistletown Regional Centre and York University
    • Clinical-Developmental Psychology ProgramYork University
  • Rosemary A. Condillac
    • TRE-ADDThistletown Regional Centre
  • Nancy L. Freeman
    • Toronto Preschool Autism ServiceSurrey Place Centre
  • Jennifer Dunn-Geier
    • Child Development Service and Eastern Regional Preschool Autism Program
  • Joanne Belair
    • Child Development Service and Eastern Regional Preschool Autism Program

DOI: 10.1007/s10803-005-0006-9

Cite this article as:
Perry, A., Condillac, R.A., Freeman, N.L. et al. J Autism Dev Disord (2005) 35: 625. doi:10.1007/s10803-005-0006-9

This study examined several questions pertaining to the Childhood Autism Rating Scale (CARS) in a sample of 274 preschool children (aged 2–6 years) clinically diagnosed as falling in one of five groups: Autistic Disorder, PDD-NOS, MR, Delayed, and Other. In addition to diagnosis and the CARS, all children were given standardized cognitive and adaptive behavior measures. Results indicated high concordance between the CARS and clinical diagnosis using DSM-IV (including excellent sensitivity and specificity). There was a moderate negative correlation of CARS scores and developmental level (both cognitive and adaptive), indicating significant shared variance. There were significant and sensible differences in mean CARS score for different diagnostic groups, including a substantial difference between the Autistic Disorder and PDD-NOS groups.



Copyright information

© Kluwer Academic Publishers 2005