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Examination of the Properties of the Modified Checklist for Autism in Toddlers (M-CHAT) in a Population Sample.

by Brie Yama, Tom1 Freeman, Erin Graves, Su Yuan, karen.campbell@schulich.uwo.ca Karen Campbell M.
Journal of Autism & Developmental Disorders
  • ISSN: 01623257

Abstract

This study examines the following properties of the Modified Checklist for Autism in Toddlers (M-CHAT) in an unselected low-risk sample: (a) the maximum age for screen administration; (b) the positive screen rate in the absence of follow-up telephone interviews and; (c) the distributional properties of positive screens. Data came from a prospective cohort study (n = 1,604). Results suggest that the M-CHAT can appropriately be administered to children aged 20-48 months. Documented explanations provided by mothers during screening, appear to effectively identify potential screen misclassifications in the absence of the follow-up telephone interviews. This further emphasizes the importance of clinician expertise in verifying positive M-CHAT screens. Results have implications for the administration of the M-CHAT in clinical and research settings. [ABSTRACT FROM AUTHOR]

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