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Autism-Spectrum Quotient (AQ)

Autism-Spectrum Quotient (AQ)

What is AQ

The Autism-Spectrum Quotient (AQ) is self-assessment screening instrument for measuring the degree to which an adult with normal intelligence has the traits associated with the autistic spectrum. The AQ is a valuable instrument for rapidly quantifying where any given individual is situated on the continuum from autism to normality.

AQ Printable PDF

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AQ Scoring and Interpretation

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Domain

Asperger Syndrome, Autism Spectrum Disorders

What does AQ measure

The purpose of the evaluation is to:

  • identify the extent of autistic traits shown by an adult of normal intelligence.

Administration

Self-administered

Type of outcome tool

Clinical

Assessment modes

Questionnaire

Age and eligibility

16 years and above

Estimated time

About 15 minutes

Notes

Since the questionnaire relies on client self-report, all responses should be verified by the clinician, and a definitive diagnosis is made on clinical grounds taking into account how well the client understood the questionnaire, as well as other relevant information from the client.

The Autism-Spectrum Quotient (AQ) is not diagnostic, but may serve as a useful instrument in identifying the extent of autistic traits shown by an adult of normal intelligence. A score of 32+ appears to be a useful cut-off for distinguishing individuals who have clinically significant levels of autistic traits. Such a high score on the AQ however does not mean an individual has Asperger syndrome (AS) or high-functioning autism (HFA), since a diagnosis is only merited if the individual is suffering a clinical level of distress as a result of their autistic traits.

A limitation of this instrument is that it may not be appropriate for patients with low IQ, since the AQ assumes reading comprehension skills.

Attribution and References

Baron-Cohen S, Wheelwright S, Skinner R, Martin J, Clubley E. The autism-spectrum quotient (AQ): evidence from Asperger syndrome/high-functioning autism, males and females, scientists and mathematicians. J Autism Dev Disord. 2001 Feb;31(1):5-17. doi: 10.1023/a:1005653411471. Erratum in: J Autism Dev Disord 2001 Dec;31(6):603. PMID: 11439754.