Examines recent developments in the American debate over heredity and environment. (RM)

Correlations on subscales of Wechsler intelligence quotient tests and the Revised Beta Examination were obtained for biologically related and unrelated individuals in 181 adoptive families in the Texas Adoption Project. Generally higher correlations for biologically related individuals support the importance of genetic influence in intellectual…

Describes the "American Renaissance" Conference of 1998 at which 200 scholars from the extreme right gathered to discuss theories of racial differences. Focuses on some of the racial extremists, including one lecturer espousing fertility controls on nonwhites. (SLD)

Virtual twins are unrelated siblings of the same age who are reared together from early infancy (UST-SA). Study uses a sample of 90 UST-SA pairs to comparatively assess the similarity of IQ subtest profile correlations for UST-SAs and twin pairs. Findings support explanatory models of intelligence that include genetic factors, demonstrating that…

Cites cultural reasons for abandoning use of intelligence testing. (DW)

Research has shown that differences among ordinary people in intelligence and personality depend equally on individual genetic variability and on differences in the environments that siblings experience within the same family, not differences in the neighborhood, school, and community environments. As of yet, there are no adequate theories to…

Portions of Inequality: A Reassessment of the Effects of Family and Schooling in America (Jencks et al 1972) are reviewed. For related articles see TM 501 196-200. (MLP)

The estimation of genetic models reported by J. L. Jinks and L. J. Eaves in a recent review are critically examined. A number of errors in procedure and interpretation are found. It is concluded that the evidence, provided by kinship correlations, for the proposition that intelligence is highly heritable, is not persuasive. (Author/BJG)

This paper examines the social determinants of IQ theory, and analyzes whether the empirical evidence offered by IQ testers is valid. It also addresses the question of whether the IQ theory is epistemologically valid. (Author/AM)

This paper reviews what is known about intelligence and the use of intelligence tests. Environmental and hereditary factors that affect performance on intelligence tests are reviewed, along with various theories that have been proposed about the basis of intelligence. Intelligence tests do not test intelligence per se but make inferences about a…

Reviews J. R. Kantor's reactional biography concept in the context of published literature in the psychology of aging. Kantor's perspective is seen to be compatible with recent views and empirical findings in the psychology of aging. (Author/SS)

Discusses R. Herrnstein's and C. Murray's attempt to persuade an educated white readership that they, the readers, are genetically, socially, and intellectually superior. The most effective criticisms are those that rely on scientific evidence about the manipulation of data and flawed analyses rather than the display of moral outrage. (SLD)

Comments on the work of Arthur Jensen, specifically "The g Factor" (1998), which consolidates the psychometric, neurophysiological, behavior genetic, and comparative evidence for the existence and importance of a factor of general intelligence ("g"). Discusses Jensen's work on black/white differences in intelligence. (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)

Examined the origins of high general cognitive ability (g) in twins who were participating in the MacArthur Longitudinal Twin Study. Formed high g groups from the 19th percentile and above at each age. Results suggested increasing genetic influence and increasing genetic stability from 14 to 36 months and substantial genetic influences with…