An AQ, short for Autism-Spectrum Quotient, is a self-administered screening questionnaire designed to measure the degree of autistic traits in adults with normal intelligence. Developed in 2001 by Simon Baron-Cohen and colleagues at the University of Cambridge, the test consists of 50 statements that you rate based on how strongly you agree or disagree. It produces a score from 0 to 50, with higher numbers indicating a stronger pattern of autistic traits.
The AQ is not a diagnostic tool. It’s a screening instrument, meaning it can flag whether a fuller professional evaluation might be worthwhile, but it cannot tell you whether you are or aren’t autistic.
What the AQ Measures
The 50-item questionnaire covers five areas of cognitive and behavioral style, with 10 questions devoted to each:
- Social skills: comfort in social situations, ability to read social cues
- Attention switching: how easily you shift focus between tasks or topics
- Attention to detail: tendency to notice patterns, numbers, or fine details others miss
- Communication: ease with conversation, small talk, and reading between the lines
- Imagination: ability to imagine fictional scenarios or pretend play
Each statement is something like “I find social situations easy” or “I tend to notice details that others do not.” You respond on a four-point scale from “definitely agree” to “definitely disagree,” and each item scores either 1 or 0 depending on the direction of the question.
How Scores Are Interpreted
The traditional research cutoff is a score of 32 or higher. In the original validation study, about 80% of autistic participants scored at or above that threshold. But interpretation isn’t as clean as a single number suggests. Scores fall into rough bands:
- 0 to 25: Few autistic traits detected. If you still relate to autistic experiences, other factors like masking, burnout, or overlapping conditions such as ADHD, OCD, or social anxiety could be involved.
- 26 to 31: Some autistic traits are present, though they may only show up in certain situations. Around 20% of autistic individuals actually score in this range or below.
- 32 to 39: A strong pattern of autistic traits across multiple areas. This is above the traditional cutoff used in research.
- 40 and above: Very strong alignment with autistic traits.
Later research has shown that the 32-point cutoff isn’t universal. Some autistic adults score well below it, and some non-autistic people score above it. The number is a starting point for conversation, not a verdict.
Screening Tool, Not a Diagnosis
The AQ catches most autistic individuals (sensitivity of about 95%), meaning it rarely misses someone who is on the spectrum. But its specificity is much lower, around 52%, which means it also flags a significant number of people who aren’t autistic. In practical terms, if you score above the cutoff, there’s roughly a coin-flip chance that something other than autism is driving your score.
This is especially true for people with ADHD. Because ADHD and autism share overlapping traits like difficulty with attention, social challenges, and executive function struggles, people with more severe attentional difficulties are more likely to score above the AQ cutoff without actually meeting autism criteria. One study found the AQ’s positive predictive value dropped to just 47% in adults with ADHD, meaning fewer than half of those flagged actually had co-occurring autism. If you have ADHD and score high on the AQ, that score alone tells you very little.
Shorter and Age-Specific Versions
The full 50-item test (often called the AQ-50) isn’t the only version. The AQ-10 is a condensed 10-item version recommended by the UK’s National Institute for Health and Care Excellence (NICE) for use with adults who don’t have a moderate or severe learning disability. It’s designed as a quick first step to help clinicians decide whether someone should be referred for a comprehensive autism assessment.
There’s also an adolescent version for ages 12 to 15, which retains the 50-item format but adjusts the language and framing for younger respondents. A separate child version exists for even younger age groups, typically filled out by parents rather than the child.
What to Do With Your Score
If you’ve taken the AQ online and scored above 26 or 32, the most useful next step is to treat it as one data point among many. A high score means your pattern of thinking, socializing, and processing information overlaps significantly with traits commonly seen in autistic people. It doesn’t confirm autism, and a low score doesn’t rule it out.
Many people take the AQ as a first step toward understanding why certain situations feel harder than they seem to be for others. If your score aligns with your lived experience, a formal evaluation by a psychologist or psychiatrist trained in autism can provide clarity. That process typically involves a detailed developmental history, structured interviews, and sometimes additional standardized assessments that go far beyond what a 50-item questionnaire can capture.