The Q-CHAT (Quantitative CHecklist for Autism in Toddlers): a normally distributed quantitative measure of autistic traits at 18–24 months of age: preliminary report
Abstract
We report a major revision of the CHecklist for Autism in Toddlers (CHAT). This quantitative CHAT (Q-CHAT) contains 25 items, scored on a 5 point scale (0-4). The Q-CHAT was completed by parents of n = 779 unselected toddlers (mean age 21 months) and n = 160 toddlers and preschoolers (mean age 44 months) with an Autism Spectrum Condition (ASC). The ASC group (mean (SD) = 51.8 (14.3)) scored higher on the Q-CHAT than controls (26.7 (7.8)). Boys in the control group (27.5 (7.8)) scored higher than girls (25.8 (7.7)). The intraclass correlation for test-retest reliability was 0.82 (n = 330). The distribution in the control group was close to normal. Full examination of the clinical validity of the Q-CHAT and test properties is underway.
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Studies using questionnaire measures of autistic traits show a continuous distribution of scores, supporting the concept of a spectrum extending into the general population.
“Studies using questionnaire measures of autistic traits (e.g., the Quantitative Checklist for Autism in Toddlers [Q-CHAT] [21], the Childhood Autism Spectrum Test [CAST] [22], and the Autism Spectrum Screening Questionnaire [ASSQ] [23]) show a continuous distribution of scores, supporting the concept of a spectrum extending into the general population.”
From Subgrouping the Autism Spectrum: Reflections on DSM-5 (2013) · cites this paper as [21]
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References 60 · Cited by 327
- Authors
- Allison, C., Baron-Cohen, S., Wheelwright, S., Charman, T., Richler, J., Pasco, G., & Brayne, C.
- Affiliations
- University of Cambridge (GB)
- University College London (GB)
- University of Minnesota (US)
- Corresponding author
- Allison, Carrie
- Venue
- Journal of Autism and Developmental Disorders
- Published
- 2008-02-01
- Volume
- 38
- Issue
- 8
- Pages
- 1414-1425
- ISSN
- 0162-3257 (ISSN-L)
- 1573-3432
- OpenAlex
- W1981837223
- Cited by
- 327
- References
- 60
- Citations by year
- 2026: 17 · 2025: 20 · 2024: 28 · 2023: 27 · 2022: 35 · 2021: 30 · 2020: 18 · 2019: 20 · 2018: 9 · 2017: 13 · 2016: 6 · 2015: 9 · 2014: 12 · 2013: 18 · 2012: 13
- FWCI
- 9.16
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Journal of Autism and Developmental Disorders (publishedVersion)
- PubMed (publishedVersion)
- IOE EPrints (submittedVersion)
- Research Portal (King's College London) (submittedVersion)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
- Health Sciences › Medicine › Psychiatry and Mental health › Child Nutrition and Feeding Issues
- Social Sciences › Psychology › Clinical Psychology › Family and Disability Support Research
- Keywords
- autistic traits, toddlers, autism spectrum disorder, parent questionnaires, test-retest reliability, sex differences, preschool children, autism screening
- MeSH terms
- Autistic Disorder, Child, Preschool, Female, Humans, Infant, Male, Mass Screening, Personality Assessment, Psychometrics, Surveys and Questionnaires, Reproducibility of Results, Early Diagnosis
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