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Gepubliceerd in: Journal of Autism and Developmental Disorders 6/2005

01-12-2005

An Evaluation of the Gilliam Autism Rating Scale

Auteur: Luc Lecavalier

Gepubliceerd in: Journal of Autism and Developmental Disorders | Uitgave 6/2005

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Abstract

The Gilliam Autism Rating Scale was developed to identify individuals with autism in research and clinical settings. It has benefited from wide use and acceptance but has received little empirical attention. The purpose of this study was to evaluate the construct and diagnostic validity, interrater reliability, and effects of participant characteristics of the GARS in a large and heterogeneous sample of children and adolescents with autism spectrum disorders. 360 parent and teacher ratings were submitted to factor analysis. A three-factor solution explaining 38% of the variance was obtained. Almost half of all items loaded on a Repetitive and Stereotyped Behavior factor. The Developmental Disturbance subscale did not contribute to the Autism Quotient (AQ) and was poorly related to other subscales. Internal consistency for the three behavioral subscales was good but low for the Developmental Disturbance subscale. The average AQ was significantly lower than what was reported in the test manual, suggesting low sensitivity with the current cutoff criteria. Interrater reliability was also much lower than originally reported by the instrument’s developer. No significant age or gender effects were found. Level of impairment, as measured by adaptive behavior, was negatively related to total and subscale scores. The implications of these findings were discussed, as was the use of diagnostic instruments in the field in general.
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Metagegevens
Titel
An Evaluation of the Gilliam Autism Rating Scale
Auteur
Luc Lecavalier
Publicatiedatum
01-12-2005
Uitgeverij
Springer US
Gepubliceerd in
Journal of Autism and Developmental Disorders / Uitgave 6/2005
Print ISSN: 0162-3257
Elektronisch ISSN: 1573-3432
DOI
https://doi.org/10.1007/s10803-005-0025-6

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