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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

Allison, Carrie and Baron-Cohen, Simon and Wheelwright, Sally and Charman, Tony and Richler, Jen and Pasco, Greg and Brayne, Carol (2008) 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. Journal of Autism and Developmental Disorders, 38. pp. 1414-1425. ISSN 0162-3257

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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 QCHAT 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 QCHAT 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.

Item Type: Article
Additional Information: The original publication is available at www.springerlink.com
Controlled Keywords: Autism Spectrum Conditions, Q-CHAT, Childhood Screening
Divisions: IOE Departments > Departments > Psychology and Human Development
Depositing User: IOE Repository Editor (2)
Date Deposited: 13 May 2010 09:46
Last Modified: 14 Oct 2013 12:03
URI: http://eprints.ioe.ac.uk/id/eprint/4352
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