Abstract
A Wherry and Wherry hierarchical factor solution was obtained on intercorrelations among the 10 subtests of the Multidimensional Aptitude Battery of Jackson to test its construct validity. Subtest scores were obtained for 300 adult male felons referred to a receiving and diagnostic center for evaluations. The findings provide considerable support for construct validity. A general ( g)-factor was defined by strong positive loadings from all 10 subtests and accounted for about 46% of the total subtest variance. A verbal educational factor was defined by positive loadings from the five verbal subtests and accounted for 16% of the total variance in the verbal subtests. A spatial-perceptual factor was defined by positive loadings from all five performance subtests and accounted for 13% of the total variance in the performance subtests.
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