This article reviews sex studies of children of cousin marriages and three studies of children of incestuous matings. It is argued that these studies, taken as a whole, provide no substantial evidence for an inbreeding depression effect within the polygenic system commonly asserted to determine IQ. (Author/DB)

Analysis of correlations between Verbal and Full Scale IQ scores for 231 high-IQ psychiatric outpatients indicated that Verbal IQ appears partially valid as a WAIS short form for this higher IQ group. Results are interpreted in terms of Resnick and Entin's short form validity criteria. (Editor/SJL)

Criticizes claims in "The Bell Curve" that a high value for heritability of intelligence constrains the extent to which environmental changes can increase intelligence. Cites adoption studies and the increasing intelligence of successive cohorts of U.S. children as evidence that intelligence can increase substantially without heroic…

Criticizes Herrnstein and Murray for their lack of respect for the truth, displayed throughout "The Bell Curve"; their willingness to encourage disharmony between groups they identify as cognitively different and to foment fear and distrust of an alleged underclass portrayed as dangerous and beyond help; and their lack of interest in…

Results are reported of an analysis of Wechsler IQ scores of 37 children (ages 3-14) with Asperger syndrome. Data revealed cognitive patterns dissimilar to those of children with other autism related disorders and similar to many typically developing and achieving individuals.. Findings are discussed in reference to identification and intervention…

Presents social scientists' claim that IQ scores can determine a person's social, educational, and occupational future at an early age. Echoes the Platonic idea that each individual should be put to the use for which nature intended, and that IQ, which is thought to be hereditary, can effectively predict this use. (58 citations) (EMH)

Lynn [Lynn, R., 2002. Sex differences on the progressive matrices among 15-16 year olds: some data from South Africa. "Personality and Individual Differences 33," 669-673.] proposed that biologically based developmental sex differences produce different IQ trajectories across childhood and adolescence. To test this theory we analyzed the…

The impetus for our study was the contention of both Lynn [Lynn, R. (1991) "Race differences in intelligence: A global perspective." "Mankind Quarterly," 31, 255-296] and Rushton [Rushton, J. P. (1995). "Race, evolution and behavior: A life history perspective." New Brunswick, NJ: "Transaction"; Rushton, J.…

Ronald C. Johnson argued that if early environmental stimulation or deprivation has a significant effect on intellectual ability, then individuals who are genetically identical and who are exposed to a common early environment should resemble one another more closely in IQ than similar individuals who have not shared a common environment. Johnson…

This is the latest in a series of reported findings for a Guidance Study which followed the same persons from infancy to age 40. The report focuses on: (1) how well the 50 men and 60 women subjects maintained their positions relative to I.Q. during the 22 years since they were last tested at age 18; (2) gains and losses in I.Q. over the 22 year…

This evaluation of cognitive change in Head Start children focused on changes in performance as opposed to changes in competence; specifically, that Binet test performance improves as a function of experience with Binet examiners. The study involved 93 children assigned to four groups who were tested for IQ gains during a 6-week Head Start program…

Challenges Jensen's arguments (set forth in the book "Bias in Mental Testing") that intelligence tests are scientifically unbiased and that IQ and other mental tests measure something called "intelligence" by refuting Jensen's reading of the psychometric research literature. (EF)

Patterns of intellectual ability of Arab children aged 6 to 16 years were examined using the new Arab WISC-R. As in prior work, a distinct profile emerged: relative superiority in Verbal over Performance IQ's which diminished with age as a flat profile emerged in adolescence. An environmental explanation is offered. (Author/RD)