The autism-spectrum quotient (AQ) is a questionnaire published in 2001 by Simon Baron-Cohen and his colleagues at the Autism Research Centre in Cambridge, UK. Consisting of fifty questions, it aims to investigate whether adults of average intelligence have symptoms of autism spectrum conditions . 
The Autism-Spectrum Quotient Test (abbreviated to AQ) is a diagnostic questionnaire designed to measure the expression of Autism-Spectrum traits in an individual, by his or her own subjective self-assessment.
The Autism-Spectrum Quotient (AQ) in Japan: A Cross-Cultural Comparison Journal of Autism and Developmental Disorders. S. Wheelwright, S. Baron-Cohen, N. Goldenfeld, J. Delaney, D. Fine, R. Smith, L. Weil and A. Wakabayashi, (2006) Predicting Autism Spectrum Quotient (AQ) from the Systemizing Quotient-Revised (SQ-R) and Empathy Quotient (EQ)
References. S. Baron-Cohen, R. A. Hoekstra, R. Knickmeyer and S. Wheelwright, (2006) The Autism-Spectrum Quotient (AQ) — Adolescent Version Journal of Autism and Developmental Disorders 36:343-350
In 2001, Simon Barron-Cohen and his colleagues at the Cambridge Autism Research Centre developed the Autism-Spectrum Quotient Test (AQ) questionnaire to measure ASD propensity. This test evaluates how strongly the traits associated with autism spectrum disorder are expressed. This test is intended for adults (16+) regardless of sex.
Test-retest and interrater reliability of the AQ was good. The AQ is thus a valuable instrument for rapidly quantifying where any given individual is situated on the continuum from autism to normality. Its potential for screening for autism spectrum conditions in adults of normal intelligence remains to be fully explored.
Apr 11, 2021 · This brief, time-saving test is designed for anyone who thinks they might benefit from an autism screening or evaluation. ... Baron-Cohen B, et al. (2001). The autism-spectrum quotient (AQ): ...