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Title: Prevalence, severity and correlates of restricted and repetitive behaviours in children with autistic spectrum disorders : a cross-sectional study
Author: Kennedy, Moira
ISNI:       0000 0004 2700 7069
Awarding Body: University of East London
Current Institution: University of East London
Date of Award: 2010
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Previous studies have highlighted the marked heterogenous nature and presentation of restricted and repetitive behaviours (RRBs) displayed by children with a diagnosis of an autistic spectrum disorder (ASD). Research to date has focused on either prevalence or severity of RRBs in children and most studies have neglected to use autism-specific measurements of RRBs. This cross-sectional study attempts to address this gap in the literature. Severity, prevalence and clinical correlates (age, IQ, adaptive behaviour and gender) of RRBs were examined in a group of 48 children (39 males, 9 females; age range 3:1 years - 12:10 years; mean age 7:5 years) with confirmed diagnoses of ASDs. Children were divided into two groups (17 preschool children and 31 primary-school children) on the basis of school placement. The Stanford Binet Intelligence Scales-Fifth Edition was administered to all children and parents/guardians completed a measure of adaptive behaviour (Vineland Adaptive Behavior Scale-Second Edition). Finally, all parents were asked to rate their children's RRBs by completing the Repetitive Behaviour Scale-Revised. Analyses revealed that age appears to be a factor in the phenomenology of RRBs in autistic spectrum disorders. With the exception of compulsive behaviours (which appear to become more severe and more prevalent with age), RRBs were rated as becoming more severe but not more prevalent as children get older. No significant association was found between RRBs and IQ although lower functioning children (IQ<69) were rated as displaying more 'low-level' RRBs (Self-injurious behaviours). Finally, no significant relationship was found between adaptive behaviour or gender and repetitive behaviour, nor were any associations found in terms of prevalence or severity. Results of this study highlight the complexity, diversity and heterogeneity of RRB symptoms in children with ASDs and provides further evidence for a much-needed re-categorisation and re-definition of the autism phenotype. Keywords: autistic spectrum disorders, restricted and repetitive behaviours, prevalence, severity, clinical correlates, triad of impairment.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (D.App.Ed.Ch.Psy.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available