Autism Spectrum Quotient Children’s Version (AQ-Child)

Abstract

The Autism Spectrum Quotient Children’s Version (AQ-Child) is a specialized psychometric instrument developed to quantify the severity and prevalence of traits associated with the broader Autism Spectrum Disorder (ASD) phenotype in children. Adapted from the original Autism Spectrum Quotient (AQ) for adults, the AQ-Child is designed as a parent-report questionnaire suitable for screening and research among children four years of age and older. It assesses five core domains of autistic symptomatology, including difficulties in social interaction, communication, attention switching, attention to detail, and imagination, providing a quantitative score reflective of an individual’s position on the autism spectrum continuum.

Keywords

Autism Spectrum Quotient, AQ-Child, Autism Spectrum Disorder, ASD, parent-report, psychometrics, social skills, attention switching, imagination, Baron-Cohen, Auyeung.

Authors

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

Purpose

The primary purpose of the AQ-Child is to measure autistic traits in pediatric populations, particularly those aged four years and above. It was developed to extend the utility of the original adult AQ scale, allowing researchers and clinicians to identify and quantify subclinical autistic features in the general population, as well as distinct characteristics in clinical groups, such as those diagnosed with Asperger Syndrome or High-Functioning Autism.

The scale serves as an important screening tool in large epidemiological studies and clinical research settings. By relying on parent or guardian observation, it captures behavioral manifestations of autistic traits that might be missed in direct clinical interviews, focusing on observable behaviors related to social interaction, repetitive behaviors, and specific interests.

Construct

The AQ-Child measures the degree to which an individual exhibits characteristics associated with the broader autism phenotype, conceptualized across five distinct psychological constructs. These constructs align closely with established diagnostic criteria for ASD, encompassing both social-communication deficits and restricted, repetitive patterns of behavior, interests, or activities.

The five measured domains are: 1) Social Skills, assessing difficulties in interpersonal interaction and understanding social cues; 2) Attention Switching, measuring resistance to change and difficulty in shifting focus between tasks or activities; 3) Attention to Detail, quantifying the tendency to focus intensely on minor details over the broader context; 4) Communication, assessing pragmatic language use and conversational difficulties; and 5) Imagination, evaluating the capacity for pretend play and flexible, imaginative thought.

Validity

The validity of the AQ-Child is supported by its ability to differentiate between children with and without clinical diagnoses of ASD, suggesting strong concurrent and discriminant validity. The scale’s items were carefully constructed and refined from the adult version, with substantial changes made to items denoted by an asterisk to ensure developmental appropriateness for the target age group.

The instrument’s conceptual foundation rests upon established theories of autism, particularly the “mind-reading” (Theory of Mind) hypothesis and the concept of enhanced attention to detail. This theoretical alignment contributes to the scale’s construct validity, ensuring it accurately measures the intended core features of the autism spectrum.

Reliability

The AQ-Child demonstrates excellent internal consistency, indicating that the items within each subscale reliably measure the same underlying construct. The Cronbach’s Alpha coefficients reported in the original validation study (Auyeung et al., 2008) are consistently high across all subscales and for the total score, suggesting strong scale reliability.

• Social Skills: 0.93
• Attention Switching: 0.89
• Attention to Detail: 0.83
• Communication: 0.92
• Imagination: 0.88
• Total Score: 0.97

Factor Analysis

The Factor Analysis performed during the development and validation of the AQ-Child confirmed a robust five-factor structure, which corresponds directly to the five primary subscales. This statistical structure supports the multidimensional nature of autistic traits as captured by the instrument, allowing for nuanced scoring across various behavioral domains rather than just a single global score.

The identification of these five factors—Social Skills, Attention Switching, Attention to Detail, Communication, and Imagination—provides empirical support for the scale’s ability to decompose the complex psychometric properties of ASD into measurable components relevant to childhood development.

Instrument

Test Type: Screening Questionnaire (Parent/Guardian Report)

Format: 50 items utilizing a 4-point Likert-type scale.

Language Available: Primarily English (Validated in the UK, but translated versions may exist).

Population Group: Children and adolescents.

Age Group: 4 years and above.

Population Details: Must be completed by the parent or guardian who knows the child well.

Test Methodology: The respondent rates each statement based on how accurately it describes the child using one of four options: Definitely agree, slightly agree, slightly disagree, or definitely disagree. Scoring is adjusted so that higher scores consistently indicate a greater presence of autistic traits. The scale is available for research use via the Autism Research Centre website. The original PDF can be downloaded here: http://docs.autismresearchcentre.com/papers/2008_Auyeung_etal_ChildAQ.pdf

Keywords

Autism Spectrum Quotient Children’s Version, AQ-Child, behavioral questionnaire, psychometric tool, social communication, restricted interests, Cambridge University, parent-report measure.

Authors

Author ORCID Identifier: Not provided in source content.

Affiliation Email addresses: [email protected] and [email protected]

Correspondence Address: Cambridge University Behaviour and Personality Questionnaire For Children (Implicitly associated with the Autism Research Centre, University of Cambridge).

Permissions & Fee and Test Year

The AQ-Child was published and validated in 2008. The instrument is generally made available for non-commercial research use through the Autism Research Centre (ARC) website, typically without a fee, though formal permission may be required for large-scale or commercial applications. The original adult version (AQ) was published in 2001.

Reference’s

• Auyeung B, Baron-Cohen S, Wheelwright S, Allison C. (2008). The Autism Spectrum Quotient: Children’s Version (AQ-Child). J Autism Dev Disord;38(7):1230-40.
• Baron-Cohen S, Wheelwright S, Skinner R, Martin J, Clubley E (2001). The Autism-Spectrum Quotient (AQ): Evidence from Asperger Syndrome/High-Functioning Autism, Males and Females, Scientists and Mathematicians. J Autism Dev Disord, 31(1);5-17.

Items of the Autism Spectrum Quotient Children’s Version (AQ-Child)

The AQ-Child consists of 50 items, rated by the parent or guardian. The items are distributed across five subscales:

• Social skills (items 1, 11, 13, 15, 22, 36, 44, 45, 47, 48)
• Attention switching (items 2, 4, 10, 16, 25, 32, 34, 37, 43, 46)
• Attention to detail (items 5, 6, 9, 12, 19, 23, 28, 29, 30, 49)
• Communication (items 7, 17, 18, 26, 27, 31, 33, 35, 38, 39)
• Imagination (items 3, 8, 14, 20, 21, 24, 40, 41, 42, 50)

The response options are: Definitely agree, slightly agree, slightly disagree, definitely disagree.

The 50 items are:

1. S/he prefers to do things with others rather than on her/his own.
2. S/he prefers to do things the same way over and over again.
3. If s/he tries to imagine something, s/he finds it very easy to cr‎eate a picture in her/his mind.
4. S/he frequently gets so strongly absorbed in one thing that s/he loses sight of other things.
5. S/he often notices small sounds when others do not.
6. S/he usually notices house numbers or similar strings of information*
7. S/he has difficulty understanding rules for polite behavior*
8. When s/he is reading a story, s/he can easily imagine what the ch‎aracters might look like*
9. S/he is fascinated by dates.
10. In a social group, s/he can easily keep track of several different people’s conversations.
11. S/he finds social situations easy.
12. S/he tends to notice details that others do not.
13. S/he would rather go to a library than a birthday party*
14. S/he finds making up stories easy.
15. S/he is drawn more strongly to people than to things*
16. S/he tends to have very strong interests, which s/he gets upset about if s/he cannot pursue.
17. S/he enjoys social chit-chat.
18. When s/he talks, it is not always easy for others to get a word in edgeways.
19. S/he is fascinated by numbers.
20. When s/he is reading a story, s/he finds it difficult to work out the ch‎aracters’ intentions or feelings*
21. S/he does not particularly enjoy fictional stories*
22. S/he finds it hard to make new friends.
23. S/he notices patterns in things all the time.
24. S/he would rather go to the cinema than a museum*
25. It does not upset him/her if his/her daily routine is disturbed.
26. S/he does not know how to keep a conversation going with her/his peers*
27. S/he finds it easy to ‘‘read between the lines’’ when someone is talking to her/him.
28. S/he usually concentrates more on the whole picture, rather than the small details.
29. S/he is not very good at remembering phone numbers.
30. S/he does not usually notice small changes in a situation, or a person’s appearance.
31. S/he knows how to tell if someone listening to him/her is getting bored.
32. S/he finds it easy to go back and forth between different activities*
33. When s/he talks on the phone, s/he is not sure when it is her/his turn to speak.
34. S/he enjoys doing things spontaneously.
35. S/he is often the last to understand the point of a joke.
36. S/he finds it easy to work out what someone is thinking or feeling just by looking at their face.
37. If there is an interruption, s/he can switch back to what s/he was doing very quickly.
38. S/he is good at social chit-chat.
39. People often tell her/him that s/he keeps going on and on about the same thing.
40. When s/he was in preschool, s/he used to enjoy playing games involving pretending with other children*
41. S/he likes to collect information about categories of things (e.g., types of car, types of bird, types of train, types of plant, etc.).
42. S/he finds it difficult to imagine what it would be like to be someone else.
43. S/he likes to plan any activities s/he participates in carefully.
44. S/he enjoys social occasions.
45. S/he finds it difficult to work out people’s intentions.
46. New situations make him/her anxious.
47. S/he enjoys meeting new people.
48. S/he is good at taking care not to hurt other people’s feelings*
49. S/he is not very good at remembering people’s date of birth.
50. S/he finds it very to easy to play games with children that involve pretending.

*Denotes items that were changed substantially from the original adult version.