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A factor analysis was performed on the intercorrelation matrix of the subtests of WB-I and WAIS. 2, 3, and 11 factors were orthogonally rotated. The two-factor and three-factor solution yielded factors that had previously been found for WB-I and WAIS separately. In the eleven-factor solution, the corresponding subtest from each scale did not load in pairs. Implications for generalizing conclusions from one form of the test to the other are discussed.