Conflict of interest for Catherine Lord: I receive royalties from a publisher for the instrument on which this study was based, but I did not receive royalties related to this study (proceeds were donated to charity).
Restricted and repetitive behaviors in toddlers and preschoolers with autism spectrum disorders based on the Autism Diagnostic Observation Schedule (ADOS)†
Version of Record online: 29 JUN 2010
Copyright © 2010, International Society for Autism Research, Wiley Periodicals, Inc.
Volume 3, Issue 4, pages 162–173, August 2010
How to Cite
Kim, S. H. and Lord, C. (2010), Restricted and repetitive behaviors in toddlers and preschoolers with autism spectrum disorders based on the Autism Diagnostic Observation Schedule (ADOS). Autism Res, 3: 162–173. doi: 10.1002/aur.142
- Issue online: 23 AUG 2010
- Version of Record online: 29 JUN 2010
- Manuscript Accepted: 6 MAY 2010
- Manuscript Revised: 3 MAR 2010
- Manuscript Received: 24 AUG 2009
- National Institute of Mental Health (NIMH)
- National Institute of Child Health and Human Development (NICHD)
- Department of Education (DOE)
- Simons Foundation. Grant Numbers: R01 MH 066496, R01 MH081873, H324C030112
- restricted and repetitive behaviors (RRBs);
- autism spectrum disorders (ASD);
- Autism Diagnostic Observation Schedule (ADOS);
Restricted and repetitive behaviors (RRBs) observed during the Autism Diagnostic Observation Schedule [ADOS: Lord et al., 2000] were examined in a longitudinal data set of 455 toddlers and preschoolers (age 8–56 months) with clinical diagnosis of Autism Spectrum Disorders (ASD; autism, n=121 and pervasive developmental disorders—not otherwise specified (PDD-NOS), n=71), a nonspectrum disorder (NS; n=90), or typical development (TD; n=173). Even in the relatively brief semi-structured observations, GEE analyses of the severity and prevalence of RRBs differentiated children with ASD from those with NS and TD across all ages. RRB total scores on the ADOS were stable over time for children with ASD and NS; however, typically developing preschoolers showed lower RRB scores than typically developing toddlers. Nonverbal IQ (NVIQ) was more strongly related to the prevalence of RRBs in older children with PDD-NOS, NS, and TD than younger children under 2 years and those with autism. Item analyses revealed different relationships between individual items and NVIQ, age, diagnosis, and gender. These findings are discussed in terms of their implications for the etiology and treatment of RRBs as well as for the framework of ASD diagnostic criteria in future diagnostic systems.