Interactive Interpreter

AQ Scoring & Cutoffs · Autism Spectrum Quotient

The Autism Spectrum Quotient (AQ) is a 50-item self-report questionnaire designed by the Autism Research Centre (ARC) at the University of Cambridge to quantify the degree to which adults exhibit traits associated with Autism Spectrum Condition.

The AQ is not a diagnostic assessment; instead, it provides a structured trait profile across five cognitive–behavioural domains commonly associated with autism: Social Skills, Attention Switching, Attention to Detail, Communication, and Imagination. Scores range from 0 to 50, with higher scores indicating more autistic traits. A score of 26 or higher is a commonly used convention for elevated autistic traits; 32 or higher is the research cutoff from Baron-Cohen et al. (2001). The AQ is widely used in screening, psychoeducation, research, and clinical triage.

  • At intake when autism traits are relevant to assessment
  • Once unless major self-perception changes or clinical reassessment is required
  • Not recommended for routine repeated measurement, as traits tend to be stable
  • Re-administration may be appropriate after several years or during comprehensive diagnostic reevaluation

For professional reference, research, and education only. Not for diagnosis or medical advice.

AQ Score Interpreter

  • Enter a total score to see its range.

  • 50 self-report items, each rescored 0 or 1. Total 0–50; higher scores indicate more autistic traits. The ≥32 threshold is from Baron-Cohen et al. (2001); the ≥26 value is a commonly used clinical convention and is not shown as a band here.

    Total scoreInterpretation
    32+At or above research thresholdScore is at or above the ≥32 threshold from the original validation study. This indicates elevated autistic traits and may support referral for a comprehensive assessment; it is not a diagnosis.
    0–31Below research thresholdScore is below the ≥32 research threshold. A lower score does not rule out autism; Ashwood et al. (2016) found 64% of adults scoring below the cut-off at a diagnostic service were diagnosed with autism.

    Baron-Cohen S et al. J Autism Dev Disord. 2001;31(1):5-17 (80% of adults with autism without intellectual disability scored 32+, versus 2% of controls).

The AQ (Autism Spectrum Quotient) is a 50-item self-report questionnaire that measures autistic traits in adults with average or above-average intelligence, scored 0 to 50 [1]. It screens for traits linked to autism; it does not diagnose.

Foundational context

Baron-Cohen, Wheelwright and colleagues developed the AQ to offer a quantitative approach to autistic traits [1]. The items were based on established cognitive models of autism, including theory of mind, social communication, sensory and detail-focused cognition, and cognitive flexibility.

The AQ’s structure reflects five conceptual domains, though scoring is typically reported as a single total score. The tool has become one of the most cited trait measures in autism research and is commonly used in clinical settings as part of referral pathways or as an adjunct to diagnostic interviews. Its purpose is not to confirm autism but to help clinicians determine whether a comprehensive autism assessment may be appropriate.

What does the AQ measure?

The AQ assesses the presence and intensity of autistic traits across five theoretical domains:

  • Social Skills: social intuition, comfort in social settings, awareness of social cues
  • Attention Switching: cognitive flexibility, adaptability, and task shifting
  • Attention to Detail: focus on details, patterns, and perceptual precision
  • Communication: pragmatic language and conversational skills
  • Imagination: mental imagery, playfulness, and ability to imagine perspectives

How do you give the AQ?

The AQ is a self-report questionnaire completed by the adult being assessed. Each of the 50 items is answered on a 4-point scale (definitely agree, slightly agree, slightly disagree, definitely disagree).

  • Best used early in assessment workflows to inform referral decisions
  • Works well when combined with developmental interviews, ASD-specific measures (e.g., the RAADS-R), or observational tools
  • For a quicker screen, the AQ-10 is a 10-item short form; the CAT-Q measures camouflaging
  • Self-report may be influenced by insight, masking, or social anxiety
  • Should be framed as a trait exploration tool rather than a diagnostic test
  • Not well-validated for individuals with intellectual disability or low literacy

How do you score and interpret the AQ?

  1. The adult answers each of the 50 items on a 4-point scale: definitely agree, slightly agree, slightly disagree or definitely disagree.
  2. Rescore each item 0 or 1, depending on whether the response reflects an autistic trait.
  3. Add the 50 item scores for a total of 0 to 50. Higher scores indicate more autistic traits.
  4. The items cover five domains (social skills, attention switching, attention to detail, communication and imagination), but the result is usually reported as a single total.
  5. A total of 32 or higher is the research threshold from the original study, where 80% of adults with autism without intellectual disability scored 32 or more, versus 2% of controls [1].
  6. A total of 26 or higher is a commonly used clinical convention for elevated autistic traits; it is not a cutoff from the original study.
  7. A score below the cutoff does not rule out autism: at an adult diagnostic service, 64% of those who scored below the AQ cut-off did have autism [2].

Interpretation Notes:

  • The AQ is a trait indicator, not a diagnostic tool
  • Scores should be considered alongside developmental history, functioning, sensory profile, and clinical interview findings
  • Individuals can score high due to other neurodivergent profiles (ADHD, social anxiety, OCD, giftedness)
  • Cultural, linguistic, and masking/camouflaging factors affect responses

Psychometric properties

Reliability

  • Strong internal consistency across domains
  • Stable trait measurement over time
  • Good test–retest reliability in adult samples

Validity

  • Demonstrated discriminant validity between autistic and non-autistic groups
  • Good convergent validity with other autism measures
  • Sensitivity and specificity vary across populations and masking profiles
  • Widely used in research but not designed as a clinical diagnostic tool

Limitations

  • Not suitable for diagnosis or determining support needs
  • Does not capture camouflaging or different autistic presentations (e.g., female or nonbinary profiles)
  • Binary scoring may oversimplify nuances
  • Cultural and linguistic differences can influence interpretation
  • May under-identify autistic individuals who mask extensively or who have mild social presentation differences

For individuals: This page is a clinical reference, not a diagnostic tool. If you have concerns about your own symptoms, bring this information to a qualified mental health professional.

Related

FAQ

  • Is the AQ a diagnostic tool for autism?

    No. The AQ is a trait screening measure, not a diagnostic tool. It quantifies the degree to which an adult exhibits traits associated with autism spectrum conditions but cannot confirm or rule out a diagnosis. A comprehensive diagnosis requires clinical interview, developmental history, and standardized assessment by a qualified professional.

  • How is the AQ scored?

    The AQ contains 50 items answered on a 4-point scale (definitely agree, slightly agree, slightly disagree, definitely disagree). Each item is rescored as 0 or 1 depending on whether the response reflects an autistic trait, yielding a total score between 0 and 50. Higher scores indicate more autistic traits.

  • What score is considered elevated on the AQ?

    A score of 32 or above is the research-based threshold established in Baron-Cohen et al. (2001), where 80% of the autism spectrum conditions group scored at this level versus 2% of controls. A score of 26 is also widely referenced in clinical settings as a commonly used convention for indicating elevated traits. Scores alone should not be used to make or exclude a diagnosis.

  • Can the AQ miss an autism diagnosis?

    Yes. Research shows that many autistic adults score below the common AQ cutoffs — a phenomenon associated with masking or camouflaging, atypical presentations, and overlapping profiles such as anxiety or ADHD. Ashwood et al. (2016) found that 64% of participants who scored below the threshold still received a clinical diagnosis of autism spectrum conditions.

References

    1. 1.Baron-Cohen S, Wheelwright S, Skinner R, Martin J, Clubley E. The autism-spectrum quotient (AQ): evidence from autism spectrum conditions, males and females, scientists and mathematicians. J Autism Dev Disord. 2001;31(1):5-17.
    2. 2.Ashwood KL, Gillan N, Horder J, et al. Predicting the diagnosis of autism in adults using the Autism-Spectrum Quotient (AQ) questionnaire. Psychol Med. 2016;46(12):2595-2604.
    3. 3.Conner CM, Cramer RD, McGonigle JJ. Examining the diagnostic validity of autism measures among adults in an outpatient clinic sample. Autism Adulthood. 2019;1(1):60-68.

    © Autism Research Centre, University of Cambridge. Free for research and non-commercial clinical use with acknowledgement of ARC; commercial use requires permission through Cambridge Enterprise.

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