Gilliam Autism Rating Scale (GARS-2)
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Product information
| Manufacturer | ACA |
|---|---|
| ASIN | B01DB64AGY |
| Is Discontinued By Manufacturer | No |
| Date First Available | March 23, 2016 |
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Product Description
The GARS-2, a revision of the popular Gilliam Autism Rating Scale, is an individually-administered norm-referenced instrument that assists teachers, parents, and clinicians in identifying and diagnosing autism in individuals ages 3 through 22 and in estimating the severity of the child's disorder. Items on the GARS-2 are based on the definitions of autism adopted by the Autism Society of America and the Diagnostic and Statistical Manual of Mental Disorders: Fourth Edition-Text Revision (DSM-IV-TR). The instrument consists of 42 clearly stated items describing the characteristic behaviors of persons with autism. The items are grouped into three subscales: Stereotyped Behaviors, Communication, and Social Interaction. Using objective, frequency-based ratings, the entire scale can be completed and scored in 5 to 10 minutes. A structured interview form is included for gathering diagnostically important information from the child's parents. The GARS-2 was normed on a representative sample of 1,107 persons with autism from 48 states within the United States. The GARS-2 has strong psychometric characteristics that were confirmed through studies of the test's reliability and validity. Coefficients of reliability (internal consistency and test-retest) for the subscales and entire test are all large to very large in magnitude. The validity of the GARS-2 was demonstrated by confirming the following: (a) the items of the subscales are representative of the characteristics of autism; (b) the subscales are strongly related to each other and to performance of other tests that screen for autism; and (c) the GARS-2 standard scores discriminates persons with autism from persons with other severe behavioral disorders such as persons with mental retardation and multi-disabilities.
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