Relations of Scores on WPPSI and WISC-R at a One-Year Interval

Abstract

This study was designed to provide information regarding the relationship between the WPPSI and the WISC-R, over a 1-yr. interval, for a sample of middle-class children of above average intelligence. There were 47 males and 43 females who were an average of 5.6 yr. at the time of first testing and 6.5 yr. at the time of second testing. The data, analyzed by a linear regression analysis, showed that the WISC-R Verbal, Performance, and Full Scale IQs could be predicted with a reasonable degree of accuracy, i.e., standard errors of estimate: Verbal IQ = 8.86, Performance IQ = 8.15, Full Scale IQ = 7.14. The results were discussed in terms of the degree of similarity between cognitive skills measured by the two tests and the clinical utility of such information.

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