James E. Gilliam

Age: 3.0 - 22.0

Administration: 5 - 10 minutes. Individual

The GADS is a norm referenced test designed to evaluate children with unique behavioral problems who may have Asperger's Disorder. Thirty-two clearly stated items divided into four subscales describe specific, observable, and measurable behaviors. Eight additional items are included for parents to contribute data about their child's development during the first 3 years of life. Easily completed by a parent and professional who knows the child, the GADS provides documentation about the essential behavior characteristics of Asperger's Disorder necessary for diagnosis.

The test was normed on 107 representative subjects with Asperger's Disorder from 27 states, the District of Columbia, Canada, and Australia. The validity of the GADS was demonstrated by (a) confirming that the items of the test are directly related to the definitions of Asperger's Disorder; (b) the subscales are strongly related to each other and the overall diagnosis of Asperger's Disorder; and (c) the GADS scores discriminate persons with Asperger's Disorder from persons with autism and other behavioral disorders. It is the only test of it's kind with this type of discriminative ability.

GADS-1

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