The major finding of this study is that there is a larger socioeconomic status or Negro-White difference on intelligence measures than on measures of rote learning and memory. The difference in the performance of Negro and White children increases with age. (EH)

Examined the regressions of occupational status and income on psychometric "g" factor scores in large samples of white (n=3,484) and black (n=493) U.S. armed forces veterans in their late 30s. Results indicate that, for both job status and income, whites were relatively more disadvantaged when the level of "g" is taken into…

An experiment involving a Group X Training or No-training design does not logically permit conclusions concerning the genetic or nongenetic causes of the main effect of the group differences or their interaction with treatments, nor can such a design reflect on the culture-fairness of the measuring instrument. For related article, see TM 502 302.…

A short critique of a 1974 monograph. (MS)

A large number of national and geographic population samples were used to test the hypothesis that the variation in mean values of skin color in the diverse populations are consistently correlated with the mean measured or estimated IQs of the various groups, as are some other physical variables, known as an ecological correlation. Straightforward…

Discusses work by Arthur Jensen in addition to his well-known work on the genetics of intelligence. Includes studies of learning, memory, the cumulative-deficit hypothesis, Spearman's hypothesis, and the speed of information processing. (SLD)

Internal evidence of cultural bias, in terms of various types of item analysis, was sought in the Wonderlic Personnel Test results in large, representative samples of whites and Negroes totalling some 1,500 subjects. Essentially, the lack of any appreciable Race X Items interaction and the high interracial similarity in rank order of item…

Concludes that these standardized tests of intelligence--the Peabody Picture Vocabulary, Raven's Progressive Matrices, Stanford-Binet, Wechsler Intelligence Scale for Children, Wonderlic Personnel Test, and most likely many other similar tests--show practically no evidence of differential culture bias for blacks and whites. (Author)

The author examines claims that the Kaufman Assessment Battery for Children (K-ABC) is less culturally biased than other standard tests of intelligence. He concludes that the diminished Black-White difference for the K-ABC is largely the result of psychometric and statistical artifacts. Implications for future test construction are noted.…

Discusses the heritability of intelligence. (MF)

From Jensen's two-level theory of mental abilities it was predicted that forward digit span (FDS) should correlate less with IQ than backward digit span (BDS), and age and race should interact with FDS-BDS, with FDS-BDS difference decreasing as a function of age and a greater white-black difference in BDS than in FDS. (Author/BJG)

The cumulative deficit hypothesis with respect to age decrement in IQ between the ages of 5 and 18 was investigated in large samples of white and black school children in rural Georgia. An environmental interpretation of the age decrement in IQ found for the black sample was offered. (Author/JMB)

Data are presented on body weight and cranial capacity for 211 young adult male Caucasians (postsecondary students). The data do not support Rushton's claim for a greater weight-adjusted cranial capacity of Mongoloid males. Speed and efficiency of cortical information processing may be more important for intelligence than brain size. (SLD)