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 e n t e r 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 subrests and accounted for 16% of the total variance in the verbal subtesa. A spatial-perceptual factor was defined by positive loading from all five performance subtests and accounted for 13% of the total variance in the performance subtests.The factor strucrure of the Wechsler Adult Intelligence Scale-Revised ( WAIS-R) ( Wechsler, 1981 ) and the Wechsler Adult Intelligence Scale ( WAIS) (Wechsler, 1955) has received a good deal of attention from factor analytic researchers (Cohen, 1957a(Cohen, , 1957b Wallbrown, Blaha, & Wherry, 1974;Blaha & Wallbrown, 1982). The findings from the Wallbrown, Blaha, and Wherry ( 1974) and Blaha and Wallbrown ( 1982) studies indicate that both the WAIS and WAIS-R subtest intercorrelations can be explained parsimoniously by a hierarchical factor structure consisting of a strong general factor and two primary factors corresponding to the verbal-educational and spatial-percep tual dimensions from Vernon's ( 1950) hierarchical paradigm.Recently, Jadrson ( 1984) developed the Multidimensional Aptitude Battery which generally parallels the content of WAIS-R subtests but actually consists of a multiple-choice item format so that it can be groupadministered. The norms were established through a study in which battery was administered along with the WAIS-R, and standard scores were established for the batrery on the basis of a linear calibration formula. Krieshak and Hatrington (1985) are skeptical about Jackson's ( 1984) calibration procedure but Jackson ( 1984) himself managed to develop a rather strong argument about the merits of anchoring a new ability test to an established intelligence test.
One thousand two hundred inmates were given the Millon Clinical Multiaxial Inventory (MCMI) in a midwestern reception and diagnostic center. Two groups of 600 were randomly divided, and their test results were subjected to a principal components factor analysis. Four factors were derived in both groups and were similar, indicating successful cross-validation. Three of the four factors bore similarity to factors found in other samples (drug abusers, psychiatric population, Viet Nam veterans), and the fourth was unique to the offender population.
The Millon Clinical Multiaxial Inventory (MCMI) is a recently introduced instrument designed to measure both symptomatology and long‐standing patterns of personality disorder in clinical popluations. Because it is designed to assess clients who are similar to those with whom the MMPI is often used (e.g., adjudicated offenders), a question may arise as to whether the two instruments measure the same aspects of clients' function. This study investigated this question by conducting a combined factor analysis of the two instruments in a criminal offender population (N = 2,245). Results indicated that although there are important areas of overlap between the two instruments, each also contains unique sources of variance. The results are interpreted as supporting the use of both instruments as part of an objective assessment battery, as has been suggested by several authors.
A hierarchical factor analysis was performed on MAB subtest intercorrelations for a sample of 300 male felons to provide a further test of the construct validity of that test. The ability hierarchy thus obtained showed a high degree of congruence with the results of the Wallbrown, Carmin, and Barnett (1988) findings for male felons and the Lee and Wallbrown (in press) for Jackson's (1984) sample. That is, a general (g) factor was loaded positively by all 10 subtests and accounted for 45% of the total subtest variance. A verbal‐educational (v:ed) factor was defined by the five verbal subtests and accounted for 21% of their variance. Similarly, a spatial‐perceptual (k) factor was defined by performance subtests and accounted for 15% of their variance.
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