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…

This book focuses on topics germane to cognitive abilities viewed from a "minority psychology" perspective. The most contentious chapters concern test bias and heredity, with culture, socioeconomic status, and case viewed as the chief explanations for test score differences between social classes and racial and ethnic groups. The reviewer…