Autism Spectrum Quotient (AQ-10 Child Version)

Abstract

The Autism Spectrum Quotient (AQ-10 Child Version) is a concise, 10-item screening instrument designed to quickly assess autistic traits in children. Developed by Allison and colleagues in 2012, this tool is an abbreviated version of the original Autism Spectrum Quotient (AQ) and serves primarily as a preliminary indicator for potential Autism Spectrum Disorder (ASD) characteristics, guiding clinicians on whether a full specialist diagnostic assessment is warranted. It is administered as a parent-report measure, focusing on key behavioral and cognitive markers associated with the autism spectrum.

Keywords

Autism Spectrum Quotient, AQ-10, Child Screening Tool, Autism Spectrum Disorder, Social Cognition, Restricted Interests, Baron-Cohen, Allison C.

Authors

Allison C., Auyeung B., Baron-Cohen S.

Purpose

The primary purpose of the AQ-10 Child Version is to provide a rapid, efficient screening of autistic traits in pediatric populations. It is specifically designed for use in primary care settings or high-throughput research environments where time efficiency is critical. The scale aims to identify individuals who score above a predefined clinical cut-off, suggesting a heightened probability of having clinically significant autistic traits, thereby necessitating referral to specialized diagnostic services.

Unlike comprehensive diagnostic tools, the AQ-10 is intended solely as a triage instrument. Its brevity minimizes respondent burden while maintaining sufficient statistical power to distinguish between children with and without clinically referred ASD, serving as an effective first-stage screening tool.

Construct

The AQ-10 Child Version measures the psychological construct of autistic traits, which are generally clustered into domains related to social interaction difficulties, communication challenges, and restricted or repetitive behaviors and interests, as defined by the standard diagnostic criteria for ASD. Although brief, the 10 items are selected to capture the most distinguishing features of the broader AQ model, focusing on areas like attention to detail versus the whole picture, social communication skills, and empathy/theory of mind (Theory of Mind).

The items were derived from the full AQ-50 based on their ability to maximize discrimination between clinical groups and typically developing controls. The construct is rooted in the idea of a continuous spectrum of autistic characteristics present across the population, making the AQ useful for measuring subclinical levels of autistic traits as well as clinically defined conditions.

Validity

The validity of the AQ-10 Child Version was established through comparison with comprehensive clinical diagnoses, typically confirmed using gold-standard instruments such as the Autism Diagnostic Interview–Revised (ADI-R) and the Autism Diagnostic Observation Schedule (ADOS). Studies, including the original validation by Allison et al. (2012), demonstrated strong discriminant validity, showing that the scale effectively differentiates between children diagnosed with ASD and typically developing controls.

The scale is particularly valued for its high sensitivity and specificity as a screening instrument. A cut-off score of 6 or greater has been empirically shown to maximize the balance between these two metrics, resulting in a high positive predictive value for subsequent clinical assessment. This robust predictive validity confirms its utility as a primary referral indicator in clinical practice.

Reliability

The reliability of the AQ-10 Child Version, while generally lower than the full AQ-50 due to its brevity, is considered adequate for a preliminary screening instrument. Internal consistency is typically assessed using Cronbach’s alpha; the original validation study reported acceptable internal consistency, confirming that the 10 items cohere sufficiently to measure a common underlying construct.

Furthermore, test-retest reliability is important for screening tools to ensure stability over short periods. Research supports the temporal stability of the AQ-10 scores, confirming its utility when administered across short intervals. This stability is crucial for ensuring that the initial screening result is a reliable representation of the child’s trait level at that time.

Factor Analysis

Given the scale’s brevity, the factor analysis of the AQ-10 Child Version typically supports a single-factor structure when used strictly as a screening measure, focusing on the overall burden of autistic traits. While the original AQ-50 measures five distinct factors (Social Skills, Attention Switching, Attention to Detail, Communication, and Imagination), the 10 items selected for the abbreviated version are chosen specifically for their high loading onto the general ASD factor.

Therefore, the AQ-10 is optimized for unidimensional measurement—the total score—rather than providing subscale scores for specific trait domains. This structural focus ensures maximum efficiency in identifying individuals who require further, more detailed, multi-dimensional assessment.

Instrument

Test Type: Brief Parent-Report Screening Questionnaire

Format: 10 self-report items (answered by a parent or caregiver). 4-point Likert scale (Definitely Agree, Slightly Agree, Slightly Disagree, Definitely Disagree).

Language Available: English (Original), widely translated into many major languages for clinical research.

Population Group: Children and adolescents.

Age Group: Typically utilized for children aged 4 to 11 years, though exact age ranges may vary by specific study context.

Population Details: Used for screening within the general population, pediatric clinical samples, and specialized research cohorts focusing on pervasive developmental disorders, particularly in settings where a rapid assessment of risk is necessary.

Test Methodology: Administration involves a parent or caregiver rating the frequency and intensity of the child’s behaviors across the 10 items. Scoring is binary (0 or 1 point per item), yielding a total score ranging from 0 to 10. A score of 6 or above is typically the threshold for referral for comprehensive diagnostic assessment.

Keywords

Screening, Pediatric Assessment, Likert Scale, Clinical Cut-off, Social Communication Deficits, Restricted and Repetitive Behaviors.

Authors

Author ORCID Identifier: Not publicly listed for all authors in the original publication records.

Affiliation Email addresses: Contact information typically associated with the Autism Research Centre (ARC), University of Cambridge, UK.

Correspondence Address: Autism Research Centre, Department of Psychiatry, University of Cambridge, UK.

Permissions & Fee and Test Year

The Autism Spectrum Quotient scales, including the AQ-10 Child Version, are generally made available for free use by researchers and clinicians, provided appropriate citation is given to the original authors and validation paper. The instrument was first validated and published in 2012.

Reference’s

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

The original PDF of the instrument can be downloaded here: http://docs.autismresearchcentre.com/tests/AQ10-Child.pdf

Items of the Autism Spectrum Quotient (AQ-10 Child Version )

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

The response options for each item are: Definitely Agree, Slightly Agree, Slightly Disagree, Definitely Disagree.

1. S/he often notices small sounds when others do not
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. S/he finds it easy to go back and forth between different activities
5. S/he doesn’t know how to keep a conversation going with his/her peers
6. S/he is good at social chit-chat
7. When s/he is read a story, s/he finds it difficult to work out the character’s intentions or feelings
8. When s/he was in preschool, s/he used to enjoy playing games involving pretending with other children
9. S/he finds it easy to work out what someone is thinking or feeling just by looking at their face
10. S/he finds it hard to make new friends

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