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Volume 13, Issue 3 (1984)

A Response to Some Questions Raised About the Woodcock-Johnson I - The Mean Score Discrepancy Issue

pp. 342—354

ABSTRACT: Most research on the Woodcock-Johnson Psycho-Educational Battery has been concerned with mean score differences between the WISC-R Full Scale and the Woodcock-Johnson Broad Cognitive Ability cluster. The results from 21 studies were summarized presenting differences ranging from 0 to 12 points. The median difference observed in referral samples was four or five points. At least three factors may account for the differences-two types of data bias, and the higher correlation of the Woodcock-Johnson cognitive subtests with school achievement. Reasons for this higher correlation were explored. Tile critical question is: Which test provides the most valid and useful information for making psychoeducational decisions?

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