Leung, Cynthia ORCID: https://orcid.org/0000-0002-6070-8794, Lau, KWY, Chan, BMY, To, CKS ORCID: https://orcid.org/0000-0003-1272-6901, Chien, CW ORCID: https://orcid.org/0000-0002-5532-1018, Lam, CCC, Lee, FMY and Liu, SKY ORCID: https://orcid.org/0009-0002-4227-3034 (2025) Validation of the Cognition Scale of the Hong Kong Comprehensive Assessment Scales for Toddlers. Healthcare, 13 (19). pp. 1-15. ISSN 2227-9032

Abstract

Background/Objectives: This study aimed to examine the psychometric properties of the Cognition Scale of the Hong Kong Comprehensive Assessment Scales for Toddlers (HKCAS-T) including its measurement properties, concurrent validity, and reliability. Methods: Participants included 282 children aged 18 to 41 months. These children were assessed on the HKCAS-T and the Cognitive Scale in the Cognitive Battery of the Merrill-Palmer-Revised Scales of Development (M-P-R). For test–retest reliability, 41 children were reassessed four weeks after the initial assessment. Results: Rasch analysis supported the unidimensionality of the HKCAS-T Cognition Scale. The scale differentiated among children of different ages, with older children achieving higher scores. The HKCAS-T Cognition Scale scores also correlated positively with the Cognitive Scale scores in the Cognitive Battery of the M-P-R. Internal consistency and test–retest reliability were both 0.98. Conclusions: The Cognition Scale of the HKCAS-T demonstrated strong psychometric properties and shows promise as an assessment tool for toddlers.

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