Fourteen estimates were made of "g" (general cognitive ability) from the normative sample of a multiple-aptitude test battery with a weighted sample representing 25,409,193 men and women. The methods, which included principal components, unrotated principal factors, and hierarchical factor analysis, are equivalent for this test. (SLD)

Comparisons of aptitude factor structures were made in nationally representative samples of young black, white, and Hispanic American men and women who took the Armed Services Vocational Aptitude Battery (ASVAB) (n=9,173). Tests reflecting content common in high school curricula showed few sex or ethnic differences. Other differences are…