The Autism Spectrum Quotient (AQ) tests for Asperger Syndrome and Autistic Spectrum disorders. The AQ consists of 50 questions, using 10 questions to test each of 5 different areas, including: social skills, attention-switching, attention to detail, communication, and imagination. The Autism Spectrum Quotient has demonstrated high validity with other measures of autism, and reliably distinguishes between High-Functioning Autism/Autism and healthy controls. Internal consistency on items is moderate to high. The AQ has high convergent validity with clinical ratings using DSM-IV criteria for autistic disorder by experienced clinicians. It takes between 5 and 10 minutes to complete. It is scored on a 5-point Likert-type rating from definitely agree, slightly agree, slightly disagree, to definitely disagree. Unlike the ADI-R and ADOS-G, the AQ is relatively easy and short to administer.
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