The Woodcock-Johnson Psycho-Educational Battery (WJ) is gaining in use in the assessment of youngsters with suspected learning disabilities. This study reports on the Tests of Cognitive Ability of the battery, which are intended to be the equivalent of an intelligence test. The correlation between full scale scores on the WISC-R and the WJ was found to be .79, suggesting considerable overlap. However, differences in mean full scale scores of approximately one standard deviation were found. Possible explanations and implications for the findings are discussed.
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