Canonical analysis of a jangle fallacy

Abstract

This study assessed the degree of redundancy between the WISC-R and the PIAT using a canonical correlation analysis. The test scores for 205 children yielded two significant canonical correlations. Taken together, these two Rc's indicated that over 65% of functions measured by the PIAT overlapped with the WISC-R, and 37% of the WISC-R subtest variance was shown to be redundant with the PIAT. The primary source of this nonsymmetrical redundancy was attributed to a verbal-educational overlap between measures.