Relationship of Scores on PPVT—R and WISC—R with Special Education Children and Youth

Abstract

Comparisons of the Peabody Picture Vocabulary Test—Revised and the Wechsler Intelligence Scale for Children—Revised were made with 104 children diagnosed as learning disabled and mentally retarded. Significant but modest correlations were found between all but one of the WISC—R scaled scores (i.e., Coding) and PPVT—R standard scores, and between WISC—R IQs and PPVT—R standard scores. Significant differences were found among mean Verbal, Performance, and Full Scale IQs and mean PPVT—R standard scores. The PPVT—R standard scores underestimated WISC—R Verbal IQs by 7 points, WISC—R Performance IQs by 17 points, and WISC—R Full Scale IQs by 11 points.