This study examines the nature of the highly variable black-white difference across diverse tests and indicates the major systematic source of this between-population variation, namely, Spearman's g. Eleven large-scale studies (discussed in the appendix), each one comprising anywhere from 6 to 13 diverse tests, show a significant and substantial…

Studies were made between performance on tests of mental abilities and concept learning tasks; it is pointed out that the researcher is usually confronted with administering large batteries of tests of mental abilities and then analyzing his results with one of the factor analytic techniques. An information process analysis of tests of mental…

The interrelationships among the three variables of intelligence, creativity, and language in a preschool, disadvantaged Negro sample were investigated. The two main hypotheses tested were: (1) The interrelationships among the three variables are lower than the interrelationships within each variable; and (2) A factor analysis indicates a factor…