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GARS-3 Manual

Gilliam Autism Rating Scale | Third Edition

GARS-3
  • 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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    • GARS-3 Complete Kit
      0158008324 Qualification Level B

      Includes Examiner’s Manual, Summary/Response Booklets (50), and the Instructional Objectives Manual, in a Storage Box.

      In stock $175.50

      Please note that the item can still be purchased. We will update you as soon as the item is back in our stock.

    • GARS-3 Summary/Response Forms
      0158008359 Qualification Level B

      Pkg of 50

      In stock $63.30

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    • GARS-3 Examiner's Manual
      0158008332 Qualification Level B

      In stock $74.50

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    Overview

    Age range:
    Individuals 3–22 years old

    Publication date:
    2013

    Qualification level:
    B

    Qualification Level

     

    Level A

    This approval level enables you to buy our assessments that require no professional degree, accreditation, organization membership, or license/certificate.

    Level B

    This approval level enables you to buy our assessments requiring A or B qualification levels.

    Level C

    This approval level enables you to buy all our assessments.

    Completion time:
    5–10 minutes

    Administration:
    Paper-and-pencil

    Scoring options:
    Manual scoring

    Product Details

    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.

    Benefits

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

    Features

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

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