Article

Brief Report: Repetitive Behaviours in Greek Individuals with Autism Spectrum Disorder

Offord Centre for Child Studies & Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, ON, Canada.
Journal of Autism and Developmental Disorders (Impact Factor: 3.06). 07/2010; 40(7):903-6. DOI: 10.1007/s10803-009-0927-9
Source: PubMed

ABSTRACT The main objective of this study was to examine the factor structure of restricted repetitive behaviours (RRBs) in a sample of 205 Greek individuals with Autism Spectrum Disorder (ASD), using the Repetitive Behavior Scale-Revised (RBS-R). Results show that the structure of RRBs in this Greek sample can be described using a 2-factor solution. The current study provides further, cross-cultural support for the distinction between a "high-order" factor reflecting compulsions, rituals, sameness, and restricted behaviours (CRSRB) and a "low-order" factor reflecting stereotyped movements and self-injurious behaviours (SSIB). These factors are most likely located at the top of the RRB structural hierarchy and represent general, independent constructs of ASD behaviours that can be identified not only across studies but also across cultures.

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    • "Some factor analysis studies of RRBs in ASD have included adults in their samples (e.g., Cuccaro et al. 2003; Georgiades et al. 2010; Lam et al. 2008; Papageorgiou et al. 2008; Shao et al. 2003). However, conclusions from these studies about RRBs in adults are limited; either because the samples span a limited age range, or because the adult samples were not separated from the child samples in the analysis. "
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    ABSTRACT: In two studies we developed and tested a new self-report measure of restricted and repetitive behaviours (RRB) suitable for adults. In Study 1, The Repetitive Behaviours Questionnaire-2 for adults (RBQ-2A) was completed by a sample of 163 neurotypical adults. Principal components analysis revealed two components: Repetitive Motor Behaviours and Insistence on Sameness. In Study 2, the mean RBQ-2A scores of a group of adults with autism spectrum disorder (ASD; N = 29) were compared to an adult neurotypical group (N = 37). The ASD sample had significantly higher total and subscale scores. These results indicate that the RBQ-2A has utility as a self-report questionnaire measure of RRBs suitable for adults, with potential clinical application.
    Journal of Autism and Developmental Disorders 07/2015; DOI:10.1007/s10803-015-2514-6 · 3.06 Impact Factor
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    • "For the RBS-R we calculated two scores (higher-order vs. lower-order repetitive behaviors) in an effort to decrease the number of variables analyzed. This is based on previous factor analysis of the RBS-R that produced these two factors: higher order (ritualistic, sameness, compulsive and restricted subscales) and lower order (stereotypy and self-injury) [32]. This construct has also been supported by a factor analysis of the YBOCS in autism [33]. "
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