Correlations among the scores of the Wechsler Intelligence Scale for children-III and the Peabody picture vocabulary test-III.

Abstract

This study investigated the relationships among the scores of the Wechsler Intelligence Scale for Children-Third Edition (WISC-III) and the Peabody Picture Vocabulary Test-Third Edition (PPVT-III). Thirty-two children, ages 6 to 8, were administered the WISC-III and the PPVT-III. For the total sample the mean WISC-1I1 Verbal la, Performance la, and Full Scale la, Verbal Comprehension Factor Score, and Vocabulary subtest scores were 111.6, 108.9, 112.8, 108.7, and 10.8, respectively. The total sample mean for the PPVT-III Standard Score Equivalent (SSE) was 108.3. The Pearson product-moment correlation coefficients between the Full Scale WISC-1I1 scores and the PPVT-III SSEs were .63 for the complete sample, correlations between the WISC-III Verbal las and the PPVT-III SSEs were .69, and correlations between the WISC-III Perforrnance 10 and the PPVT-III SSEs were .38. The correlations between the WISC-III Verbal Comprehension Factor scores and the PPVT-III SSEs were .66 and correlations between the WISC-III Vocabulary subtest scores and the PPVT-III SSEs were .51. All of the correlations were significant except between the WISC-III Performance 10 scores and PPVT-II1 SSEs with the boys. The results of this study indicated that the PPVT-III may be used to estimate WISC-III Full Scale la, Verbal la, Verbal Comprehension, and Vocabulary subtest scores when used with 6 to 8 year olds.