James E. Gilliam

Gilliam Autism Rating Scale, Third Edition (GARS-3) is one of the most widely used instruments for the assessment of autism spectrum disorder in the world. The GARS-3 assists teachers, parents, and clinicians in identifying autism in individuals and estimating its severity

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Gilliam Autism Rating Scale | Third Edition

GARS-3 can be used to help identify and diagnose autism in children and young adults. Get GARS-3 from Pearson now.

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GARS-3 Examiner's Manual (Print)

Includes Examiner's Manual, 50 Summary/Response Forms, and the Instructional Objectives Manual, all in a sturdy storage box

GARS-3 Complete Kit (Print)

GARS-3 Summary/Response Forms (Print)

GARS-3 Instructional Objectives for Individuals Who Have Autism (Print)

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			<p>The GARS-3 yields standard scores, percentile ranks, severity level, and probability of autism. Items on the GARS-3 are based on the 2013 diagnostic criteria for autism spectrum disorder adopted by the APA.</p>

			<h3>Benefits</h3>

			<ul>
				<li>Correlates with other well-known diagnostic tests for autism at magnitude large or very large.</li>
				<li>Includes all new validity studies that show test results are valid for a wide variety of subgroups, as well as for the general population.</li>
				<li>Accurately discriminates children with autism spectrum disorder from children without autism (sensitivity = .97, specificity = .97, ROC/AUC = .93).</li>
				<li>Internal consistency (content sampling) reliability coefficients for the subscales exceed .85 and the Autism Indexes exceed .93.</li>
				<li>Test-retest (time sampling) reliability coefficients exceed .80 for subscales and .90 for the Autism Indexes.</li>
				<li>Interrater reliability intraclass coefficients exceed .80 and .84 for the Autism Indexes.</li>
			</ul>

			<h3>Features</h3>

			<p>The instrument consists of 56 items grouped into six subscales: Restrictive/Repetitive Behaviors, Social Interaction, Social Communication, Emotional Responses, Cognitive Style, and Maladaptive Speech.</p>

			<ul>
				<li>Includes four new items.</li>
				<li>All six subscales have been empirically determined to be valid and sensitive for identification of children with ASD.</li>
				<li>An interpretation guide provides the examiner with an easy and efficient method for assessing the probability and severity of autism spectrum disorder.</li>
				<li>A diagnostic validation form is included to ensure test results meet DSM-5 criteria for autism spectrum disorder.</li>
				<li>Demographic characteristics of the normative sample are keyed to those reported by U.S. Bureau of the Census in 2011.</li>
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