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J Autism Dev Disord. 2012 Sep;42(9):2006-12. doi: 10.1007/s10803-011-1434-3.

Brief report: repetitive behaviors in young children with autism spectrum disorder and developmentally similar peers: a follow up to Watt et al. (2008).

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Department of Communicative Disorders, University of Alabama, 700 University Blvd. E, P.O. Box 870242, Tuscaloosa, 35487, AL, USA.


The present study extended the findings of Watt et al. (J Autism Dev Disord 38:1518-1533, 2008) by investigating repetitive and stereotyped behaviors (RSB) demonstrated by children (n = 50) and typical development (TD; n = 50) matched on developmental age, gender, and parents' education level. RSB were coded from videotaped Communication and Symbolic Behavior Scales Behavior Samples (Wetherby and Prizant 2002) using the Noldus Pro Observer© video software. Children with ASD demonstrated significantly higher frequencies of RSB with body objects excluding categories involving banging or tapping objects or surfaces. Behaviors demonstrated by both groups indicated overlapping RSB profiles at this age. These findings highlight the significance of RSB in the early identification and support the need for future research to further determine ASD-specific RSB.

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