Concurrent Validity of the Peabody Picture Vocabulary Test-R and the Expressive One-Word Picture Vocabulary Test for Language-Delayed and Non-Language-Delayed Young Children

Abstract

This study investigated the concurrent validity of the Peabody Picture Vocabulary Test-Revised and Expressive One-Word Picture Vocabulary Test with the Wechsler Preschool and Primary Scale of Intelligence for a sample of 15 language-delayed and 36 non-language-delayed children. The children's ages ranged from 45 months to 76 months. A 2 x 5 analysis of variance with repeated measures was used to analyze the data. The Newman-Keuls multiple-comparison test was used to identify pairwise differences between specific means. Pearson product-moment correlations were also computed for the two groups between scores on the Peabody Picture Vocabulary Test-Revised and Expressive One-Word Picture Vocabulary Test scores, Verbal, Performance, and Full-Scale IQs on the Wechsler Preschool and Primary Scale of Intelligence. The 2 x 5 ANOVA (group x test) yielded a significant main effect across the five tests, but no effects related to the groups. The interaction effect was not statistically significant. Implications for the use of the Wechsler Preschool and Primary Scales of Intelligence, Peabody Picture Vocabulary Test-Revised, and Expressive One-Word Picture Vocabulary Test with language-delayed young children are discussed.

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