Mason Archival Repository Service

Repetitive and Restricted Behaviors and Interests in Children and Adolescents with Autism Spectrum Disorder

Show simple item record

dc.contributor.advisor Rojahn, Johannes Warsof, Beth
dc.creator Warsof, Beth en_US 2013-08-19T21:15:37Z 2013-08-19T21:15:37Z 2013-08 en_US
dc.description.abstract This dissertation examined Repetitive and Restricted Behaviors and Interests (RRBIs) in children and adolescents with Autism Spectrum Disorder (ASD). We looked at RRBI ratings from the respective subscales of the Autism Diagnostic Observation Schedule (ADOS; Lord et al. 2000), a clinician observation, and the Autism Diagnostic Interview-Revised (ADI-r; Le Couteur et al., 2003), a parent developmental history report. The purpose was to explore (1) whether RRBIs total scores diminish as individuals with ASD get older, (2) whether RRBIs are a cohesive, unitary construct or whether there are distinct subtypes of RRBIs, and (assuming that there are RRBIs subtypes) whether these subtypes show different trajectories across age and intellectual functioning, and (3) to what extent the ADOS and ADI-r RRBI subscales cross-validate one other. Exploratory and confirmatory factor analyses for the ADOS and ADI-r resulted in two-factor models, which we labeled as Cognitive-Restrictive and Motor-Sensory. For total RRBIs, Cognitive-Restrictive RRBIs, and Motor-Sensory RRBIs, adolescents showed significantly lower impairment ratings than younger age groups. Total RRBI ratings were negatively associated with IQ scores for both instruments. However, examining the RRBI subscale scores separately revealed that only Cognitive-Restrictive ratings had a negative association with IQ scores. Ratings for the Motor-Sensory scale were not associated with IQ. On the ADI-r, a significant interaction showed that Cognitive-Restrictive ratings were higher and unchanging for lower-functioning individuals across age groups. Higher-functioning individuals showed lower ratings across each age group. We also found that RRBI items from the ADOS and the ADI-r correlated relatively poorly across the measures. Our study provides evidence for the two-factor model of RRBIs, though distinctions from prior researchers' models are highlighted.
dc.format.extent 88 pages en_US
dc.language.iso en en_US
dc.rights Copyright 2013 Beth Warsof en_US
dc.subject Developmental psychology en_US
dc.subject ADI-r en_US
dc.subject ADOS en_US
dc.subject Autism Spectrum Disorder en_US
dc.subject Repetitive Behaviors en_US
dc.subject Restricted Interests en_US
dc.title Repetitive and Restricted Behaviors and Interests in Children and Adolescents with Autism Spectrum Disorder en_US
dc.type Dissertation en Doctoral en Psychology, Applied Developmental Concentration en George Mason University en

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search MARS


My Account