Skip to main content Skip to main navigation

Privacy and Cookies

We use cookies to give you the best experience on our website. By continuing, you're agreeing to use of cookies. We have recently updated our policy.

  1. Home
  2. Store
  3. Professional Assessments
  4. Behavior
  5. Gilliam Autism Rating Scale | Third Edition

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.

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

GARS-3 Manual

Pricing & Ordering

  • GARS-3 Complete Kit

    0158008324

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

    Pricing and Qualification

    Price: $175.50

    Qualification Level B

    Ordering

    In stock

    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

    Pkg of 50

    Pricing and Qualification

    Price: $63.30

    Qualification Level B

    Ordering

    In stock

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

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.