The GARS–3 assists teachers, parents, and clinicians in identifying autism in individuals and estimating its severity
Publisher
ProEd
Age range
3 to 22
Qualification Level
B
Administration Time
5 to 10 mins
Full Product Description
The Gilliam Autism Rating Scale, now in its third edition,
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.
Items on the GARS–3 are based on the 2013 diagnostic criteria for autism spectrum disorder adopted by the APA and published in the Diagnostic and Statistical Manual of Mental Disorders–Fifth Edition (DSM–5). The GARS–3 yields standard scores, percentile ranks, severity level, and probability of Autism.
The instrument consists of 56 clearly stated items describing the characteristic behaviors of persons with autism. The items are grouped into six subscales: Restrictive/Repetitive Behaviors, Social Interaction, Social Communication, Emotional Responses, Cognitive Style, and Maladaptive Speech.
New Features of the GARS–3
Items and subscales reflect DSM–5 diagnostic criteria for Autism Spectrum Disorder.
Forty–four new items were added to the GARS–3.
All six subscales have been empirically determined to be valid and sensitive for identification of children with ASD.
Normative data (N
= 1,859) were collected in 2010 and 2011.
Demographic characteristics of the normative sample are keyed to those reported by U.S.
Bureau of the Census, 2011.
An interpretation guide in the Examiner’s Manual allows the examiner an easy and efficient method for assessing the probability of autism spectrum disorder and the severity of the disorder.
Reliability and Validity
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.
Correlations of the GARS–3 scores with those of other well–known diagnostic tests for autism are large or very large in magnitude.
All new validity studies show that the test results are valid for a wide variety of subgroups,
as well as for the general population.
Binary classification studies indicate that the GARS–3 is able to accurately discriminate children with autism spectrum disorder from children without autism (i.e., sensitivity = .97, specificity = .97, ROC/AUC = .93.
Confirmatory and exploratory factor analyses demonstrate the theoretical and empirical validity of the subscales.
Other validity evidence is provided in the manual.
Kit
GARS-3: Gilliam Autism Rating Scale 3rd Ed Kit
CODE: 13780
Examiner’s Manual, 50 Summary/Response Forms, and the Instructional Objectives manual
€271.54 Excl.VAT
Components
GARS-3: Summary/Response Form w/access code 50pk
CODE: 13783
€93.96 Excl.VAT
GARS-3: Examiner's Manual
CODE: 13781
€111.51 Excl.VAT
GARS-3: Instructional Objectives for Individuals Who Have Autism
CODE: 13782
€65.05 Excl.VAT
Pro Ed Qualifications Policy
QUALIFICATION LEVEL A: There are no special qualifications to purchase these products. QUALIFICATION LEVEL B: Tests may be purchased by individuals with:
A master’s degree in psychology, education, occupational therapy, social work, counselling, or in a field closely related to the intended use of the assessment, and formal training in the ethical administration, scoring, and interpretation of clinical assessments.
OR A degree or license to practice in the healthcare or allied healthcare field.
OR Formal, supervised mental health, speech/language, occupational therapy, social work, counselling, and/or educational training specific to assessing children, or in infant and child development, and formal training in the ethical administration, scoring, and interpretation of clinical assessments.
QUALIFICATION LEVEL C:
Tests with a C qualification require a high level of expertise in test interpretation, and can be purchased by individuals with:
A doctorate degree in psychology, education, or closely related field with formal training in the ethical administration, scoring, and interpretation of clinical assessments related to the intended use of the assessment.
OR Licensure or certification to practice in your state in a field related to the purchase.
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