Abstract
The purpose of the present study was to examine the predictive validity of all scales and subtests from the Bayley-III. The sample consisted of 55 normal children who were assessed at six time points between 4 and 36 months. Significant correlations ranging from .28 to .79 were found for all ages and scales/subtests, but the three main scales differed with respect to predictive validity. The Cognitive Scale was predictive from 7–10, 7–13 and 10–13 months but not from 13 months and onwards. The Language Scale was predictive from 10 months and onwards and the Motor Scale was predictive at all ages, but only with respect to adjacent and not distant assessment points.
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