In order to assess the comparability of the revised ITPA, the Stanford-Binet, and the WISC, 100 six-year-old children from an average socioeconomic area were given a standardized administration of the three measures. Results indicate high comparability among the IQ/PLQ scores of the three measures as well as highly significant relationships among some of the individual subtest and part scores of the WISC and ITPA. The correlations between WISC Verbal and Full Scales and the ITPA measures were higher than those of the WISC Performance Scale. Formulas for estimating Stanford-Binet and WISC IQ from the ITPA PLQ are also provided.
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