Abstract
Evaluating the psychometric properties of the indicators that comprise the Early Childhood Environment Rating Scale‐Revised (ECERS‐R) language‐reasoning scale from an item response theory (IRT) perspective on a sample of observations from 334 Caribbean classrooms, Stout’s procedure revealed that all indicators on this dimension are not part of a single essentially unidimensional construct. IRT‐based factor analyses on the indicator scores yielded two factors – named Language‐Reasoning Activities and Language‐Reasoning Materials. IRT analyses conducted on these two factors revealed that their indicators provide adequate psychometric information and have no floor effects – although they demonstrate evidence for ceiling effects. IRT also revealed that at least within the Caribbean context: (a) the ECERS‐R authors have ordered the indicators inappropriately; (b) administration of all indicators is unnecessary; and (c) equally weighting indicators might yield spurious results. IRT‐based scoring might improve the psychometric soundness of indicators on this ECERS‐R scale.
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