Adolescent Autism Spectrum Quotient (AQ-10) – Parent version

Abstract

The Adolescent Autism Spectrum Quotient (AQ-10) – Parent version is a brief, 10-item screening tool designed to quickly assess Autism Spectrum Disorder (ASD) traits in adolescents, typically aged 11 to 15 years. Developed by Allison, Auyeung, and Baron-Cohen in 2012, this instrument is completed by a parent or primary caregiver, offering an external, observational perspective on the adolescent’s behavioral and cognitive patterns. It serves as a rapid initial filter in clinical settings, identifying individuals who require a comprehensive specialist diagnostic assessment based on a clinical cutoff score of 6 out of 10.

Keywords

Autism Spectrum Quotient, AQ-10, Adolescent screening tool, Parent-report, ASD traits, Simon Baron-Cohen, diagnostic assessment.

Authors

Allison C, Auyeung B, Baron-Cohen S.

Purpose

The primary purpose of the AQ-10 (Parent version) is to provide a brief, efficient, and reliable method for identifying adolescents (typically aged 11–15 years) who exhibit core characteristics consistent with Autism Spectrum Disorder (ASD). As a brief measure derived from the longer 50-item Autism Spectrum Quotient (AQ), the AQ-10 is specifically optimized for use in clinical and research settings where time constraints necessitate a rapid pre-screening instrument.

The instrument is intended to aid clinicians and researchers in making informed decisions regarding referral. A score exceeding the established clinical threshold (more than 6 out of 10) suggests a high probability of significant ASD traits, warranting immediate referral for a full, multi-disciplinary diagnostic assessment conducted by specialists. The use of a parent-report format capitalizes on the extensive observational experience of the caregiver in diverse real-world settings.

Construct

The AQ-10 measures the underlying psychological construct of autistic traits, consistent with the domains captured by the full AQ scale. These traits are conceptualized as lying on a continuum within the general population, with clinical ASD representing the extreme end of this spectrum. The 10 items specifically target key areas of difference often observed in individuals with ASD, including social interaction, communication, attention switching, attention to detail, and imagination.

The 10 items effectively sample the core diagnostic features outlined in standard diagnostic manuals, focusing on areas such as difficulty with social reciprocity (e.g., keeping a conversation going, making friends), reduced empathy (e.g., difficulty imagining being someone else), attention to detail versus the whole picture, and rigid behavioral patterns (e.g., noticing patterns all the time). This construct highlights the core features central to the conceptualization of autism.

Validity

Studies supporting the AQ-10, particularly the adolescent version, emphasize its robust discriminant validity. Research by Allison, Auyeung, and Baron-Cohen (2012) demonstrated that the AQ-10 successfully differentiated between adolescents diagnosed with ASD and typically developing controls, even when administered in the shorter, 10-item format. The scale maintains high sensitivity and specificity, crucial for an effective screening tool.

The criterion validity is supported by its strong correlation with established, comprehensive diagnostic measures such as the Autism Diagnostic Interview–Revised (ADI-R) and the Autism Diagnostic Observation Schedule (ADOS). The brevity of the scale does not appear to compromise its ability to capture the essential features of the autistic phenotype, making it a valid proxy for comprehensive assessment in initial screening stages.

Reliability

While the AQ-10 is exceptionally brief, its internal consistency has been reported as acceptable for a rapid screening measure, reflecting that the 10 items cohere sufficiently to measure a single underlying construct related to autistic tendencies. Due to the diverse nature of ASD symptoms captured across only 10 items, the reliability coefficient may be slightly lower than those of longer diagnostic instruments, but it remains adequate for its intended purpose as a quick filter.

Furthermore, the test-retest reliability is generally high, suggesting stability of scores over short intervals. This indicates that the parent’s perception of the adolescent’s enduring traits is consistent, reinforcing the instrument’s utility in clinical practice for reliable measurement of core ASD features.

Factor Analysis

The full 50-item AQ scale typically yields five underlying factors (Social Skills, Attention Switching, Attention to Detail, Communication, and Imagination). However, the 10-item version is generally utilized as a unidimensional scale, meaning that all items contribute to a single, overall score reflecting the severity of autistic traits.

Although the original selection of the 10 items was driven by factor analysis results from the longer AQ (selecting items with the highest factor loadings and best discrimination between clinical and control groups), the primary utility of the AQ-10 lies in its total score. Studies confirm that using a single factor structure for the total score maximizes its clinical utility for binary classification (referral needed vs. no referral needed).

Instrument

Test Type: Psychometric Screening Tool

Format: 10-item questionnaire using a forced-choice Likert-type scale.

Language Available: English (and translated versions exist in various languages for research purposes).

Population Group: Caregivers/Parents reporting on an adolescent.

Age Group: Adolescents, typically aged 11 to 15 years.

Population Details: Developed and validated primarily using clinical populations of adolescents diagnosed with ASD and non-clinical controls.

Test Methodology: Parent rates the adolescent on a 4-point scale (Definitely Agree, Slightly Agree, Slightly Disagree, Definitely Disagree). Scoring is dichotomous (0 or 1 point) based on the direction of the item (pro-autistic traits score 1).

Keywords

Psychological assessment, clinical cutoff, psychometrics, parent-report, adolescent development, social communication, restricted interests.

Authors

Author ORCID Identifier: N/A

Affiliation Email addresses: N/A

Correspondence Address: Autism Research Centre, Department of Psychiatry, University of Cambridge, UK (Affiliation of primary authors, including Baron-Cohen S).

Permissions & Fee and Test Year

The AQ scales, including the AQ-10, are generally considered open-access for non-commercial research and clinical use, often available directly from the Autism Research Centre (ARC). Users should verify current licensing requirements for specific applications. The scale was formally published and validated in 2012.

The original PDF can be downloaded here: http://docs.autismresearchcentre.com/tests/AQ10.pdf

Reference’s

Allison C, Auyeung B, and Baron-Cohen S, (2012). Toward a brief screening tool for autism in adolescents and adults: The Adolescent and Adult Autism Spectrum Quotient-10 (AQ-10). Journal of the American Academy of Child and Adolescent Psychiatry, 51(2):202-12.

Items of the Adolescent Autism Spectrum Quotient (AQ-10) – Parent version

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

The response options are: Definitely Agree, Slightly Agree, Slightly Disagree, Definitely Disagree.

Scoring Instructions: Only 1 point can be scored for each question. Score 1 point for Definitely or Slightly Agree on each of items 1, 5, 8, and 10. Score 1 point for Definitely or Slightly Disagree on each of items 2, 3, 4, 6, 7 and 9. If the individual scores more than 6 out of 10, consider referring them for a specialist diagnostic assessment.

1. S/he notices patterns in things all the time
2. S/he usually concentrates more on the whole picture, rather than the small details
3. In a social group, s/he can easily keep track of several different people’s conversations
4. If there is an interruption, s/he can switch back to what s/he was doing very quickly
5. S/he frequently finds that s/he doesn’t know how to keep a conversation going
6. S/he is good at social chit-chat
7. When s/he was younger, s/he used to enjoy playing games involving pretending with other children
8. S/he finds it difficult to imagine what it would be like to be someone else
9. S/he finds social situations easy
10. S/he finds it hard to make new friends