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Assessment Tools: GARS-3: Gilliam Autism Rating Scale

The assessment tool collection encompasses all assessments that are used in medical rehabilitation with a primary focus on physical therapy and occupational therapy.

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GARS-3: Gilliam Autism Rating Scale

Author: James E. Gilliam

Summary: The Gilliam Autism Rating Scale - Third Edition (GARS-3) is a norm-referenced screening instrument used to identify persons who have autism spectrum disorders. Its content is based on the definitions of autism from the American Psychiatric Association (2012) and the Autism Society (2012).--GARS 3 examiner's manual, third ed., p. 1
Format: kit

Library Record:  Neil John Maclean Health Sciences Library Reserves (WS 350.8 P4 G481g3 2014 ATOOLS)

Population: 3 through 22
Completion time: 5 to 10 minutes


  • 1 examiner's manual
  • 1 Instructional objectives for individuals who have autism resource guide
  • 50 identical summary/response forms
  • in box 24 x 30 x 6 cm..

URL Link to Publisher:

Determine Validity and Reliability    
To determine validity and reliability of this test copy and paste the search string into a PubMed (U of M faculty, students and affiliated users use this PubMed link):

("cognitive performance test") AND ((((("Reproducibility of Results"[Mesh]) OR "Sensitivity and Specificity"[Mesh])) OR (reliabl* OR valid*)) OR (sensitiv* AND specif*)) 

To search the validity and reliability in CINAHL copy and paste this search string into CINAHL (U of M faculty, students and affiliated users only)

(("cognitive performance test”) OR (IN cognitive performance test)) AND (( (MH "Reliability and Validity+") OR (MH "Measurement Issues and Assessments+") OR (MH "Predictive Validity") OR (MH "Sensitivity and Specificity") ) OR ( reliabil* OR valid* ) OR ( sensitivity and specificity ))

Use Policy

The Neil John Maclean Health Sciences Library will provide assessment tools and outcome measures for loan to faculty, students and staff of the Winnipeg Regional Health Authority (WRHA) with a valid University of Manitoba (U of M) Library ID. If you qualify to borrow a tool you will need to fill out and present this form to the NJMHSL Circulation staff.


Open the following sections for information on:


Borrowing Tools

Outside Library Use

Loans to Therapists not Affiliated with the U of M or WRHA

Document Delivery