The AQ test (Autism Spectrum Quotient), explained

The AQ is probably the most widely taken autism questionnaire in the world. It shows up in research studies, on clinic forms and on countless websites. Part of its appeal is that it treats autistic traits as something everyone has to some degree, placing each person somewhere on a continuous scale rather than in one of two boxes.

Key facts about the AQ

Full name

Autism-Spectrum Quotient (AQ), adult version

Authors

Baron-Cohen S, Wheelwright S, Skinner R, Martin J, Clubley E

Published

2001, Journal of Autism and Developmental Disorders

Where it comes from

The University of Cambridge autism research group (ARC)

Items

50 statements

Answer format

Four options from definitely agree to definitely disagree

Score range

0 to 50

Other versions

Adolescent and child versions completed by parents, and the 10-item AQ-10

What the AQ measures

The 50 statements are spread evenly across five areas of 10 each: social skill, attention switching, attention to detail, communication and imagination. Some statements are worded so that agreeing reflects an autistic trait, and others so that disagreeing does. Each answer in the trait direction earns one point, whether you chose the mild or strong option.

The authors described it as a way to measure where any adult sits on a continuum of autistic traits. They were careful to say its usefulness for screening adults still needed to be explored. Later research has shown why that caution was wise.

What the original study found

That finding about scientists and mathematicians drew a lot of attention. It also shows something important for readers: interests and thinking styles common in technical fields can raise a score without anyone being autistic. A high AQ is a description of traits, not an identity.

Known limits

• It was developed for adults with average or above-average intelligence.
• It relies on self-insight, which can be hard for people who mask or who have alexithymia, meaning difficulty identifying their own emotions.
• Anxiety and other conditions can raise scores.
• Some statements reflect a 1990s British context, and cultural norms shape how people answer.

AQ, AQ-10 and other versions

The same Cambridge group later produced an adolescent version and a child version, both completed by a parent, plus the 10-statement AQ-10 for quick referral decisions. Researchers elsewhere have built other short forms, and the AQ has been translated into many languages. Each version has its own scoring and its own research base, so a score on one should not be compared directly with a score on another.

People sometimes search for a Cambridge autism test as if it were a single clinical exam. In practice, the Cambridge group has produced a family of research questionnaires, including the AQ, the Empathy Quotient and the Eyes Test. They are widely used in studies of traits across the population, but none of them is a diagnostic assessment on its own.

Why a trait score is not a diagnosis

A diagnosis asks more than how many traits you report. It asks whether those traits have been present since early development, whether they cause real difficulty in daily life, and whether something else explains them better. The AQ answers only the first, narrow question, and only from your own point of view. Two people with the same score can have entirely different lives and different clinical pictures.

Who can use the AQ

The University of Cambridge group offers the AQ as a free download for research, with acknowledgment of the source, and says it is not for commercial use or adaptation without permission. That is why SpectrumFox does not host the AQ or reproduce its statements. If you want to read the official version, go to the ARC tests page linked in our sources rather than a reworded copy.

AQ test for adults: how to approach it

If you have already taken an online AQ and want to understand your number, our AQ scoring page walks through the published cut-off and what research says about it. If you are wondering whether to seek an assessment, the AQ score is one input, but your history and current difficulties matter more.