The ranking of Wechsler subtests in terms of their "g" loadings is equivalent to ranking them in terms of the cognitive complexity of the tasks measured. Lower performing groups do not always fall behind higher performing groups the more complex the task. But that is the general rule, no matter whether the cause of the lower performance…

The black-white difference in test scores for the three standardizations of the Woodcock-Johnson battery of cognitive tests is analyzed in terms of birth cohorts covering the years from 1920 through 1991. Among persons tested at ages 6-65, a narrowing of the difference occurred in overall IQ and in the two most highly "g"-loaded clusters…

Raw IQ scores do not demonstrate the bell curve created by normalized scores, even the bell-shaped distribution does not require large numbers of underlying genes. Family data support a major gene locus of IQ. The correlation between glutathione peroxidase and IQ should be investigated through molecular genetics. (SLD)

Discusses the contributions of Arthur Jensen to the study of intelligence and considers his writings on the topic of racial differences in scores on tests of intelligence. Concludes with a discussion of his work on the correlates of the "g" vector (general intelligence factor). (Author/SLD)

The nature of differences in performance on the third revision of the Stanford-Binet Intelligence Scale (Form L-M) was assessed for two independent samples of Black (n=86) and White (n=86) preschoolers matched for parental education, age, and sex. Large differences, favoring White children, were found. Test bias is discussed. (TJH)

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…

Genetic influence was estimated on Wechsler Intelligence Scale for Children subtests from inbreeding depression scores calculated on cousin marriages in Japan (n=1,854 children) and correlated with American Black-White racial differences. The genetic contribution of racial differences in cognitive performance may be more robust than was previously…