This longitudinal randomized-control trial investigated the effectiveness of scientifically based reading instruction for students with IQs ranging from 40 to 80, including students with intellectual disability (ID). Students were randomly assigned into treatment (n = 76) and contrast (n = 65) groups. Students in the treatment group received…

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…

To examine whether or not retarded individuals have the same structure of intelligence as normal IQ individuals, test scores from the Wechsler Intelligence Scale for Children-Revised (WISC-R), Reitan's Trail Making Test (TMT), and Beery's Developmental Test of Visual Motor Integration (VMI) for both a mildly retarded and normal IQ population of…

The percentage of variance in achievement accounted for by IQ greatly decreased as the subgroups became more removed from the mean IQ for the sample. Results suggest that definition and placement decisions based on IQ be reconsidered for populations whose mean IQ is substantially above or below the average IQ. (DB)

School psychologists, considered experts on intelligence and assessment, have an ethical obligation to read and understand "The Bell Curve: Intelligence and Class Structure in America." Many would rather avoid than confront issues presented. Discusses four questions to consider before dismissing the book: "How helpful is it?"; "Could the…

This article explores the current trend to dismiss general intelligence in favor of multiple intelligences in identifying gifted students. Advantages of the IQ test in identifying exceptionally gifted students who have unique educational and socio-emotional needs and the curricular implications of the general intelligence focus are discussed.…

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)

Children referred for psychological evaluations of completed the Bender-Gestalt and then reproduced designs from memory. Numbers of designs recalled increased with age and Performance Intelligence Quotient. The importance of developmental level in evaluation and establishment of cut-off recall scores for designs were discussed. (Author/RD)

This article examines psychometric analysis regarding the viability and limits of IQ testing in the context of "The Bell Curve." It discusses eyeball analysis versus item analysis, mean differences, validity coefficients, general intelligence, and IQ and gifted education, and urges a search for intrapersonal and environmental catalysts…

Until the 1970s, there were few signs of change in the historic difference of one standard deviation between average ability or achievement test scores of black and white students. From 1970 to the mid-to-late 1980s, there was a substantial convergence of the average achievement test scores of blacks and whites. From the mid-to-late 1980s to 1992,…

Data on the magnitude of significant Wechsler Intelligence Scale for Children-Revised Verbal-Performance Intelligence Quotient (IQ) discrepancies (specifically the nondirectional aspect of significant frequencies) within the normal population are often misunderstood by clinicians. Suggestions for remedying inaccuracies in reporting discrepancies…

Findings showed an almost even percentage of boys and girls, that more girls had fathers with doctorate degrees, that girls' arithmetic and spatial abilities were not significantly different from boys', that girls increased or decreased in IQ more than boys in high school, and that boys' IQs and grade point averages were significantly correlated…

This paper takes the position that the main premise of "The Bell Curve" (by Richard Murray and Charles Herrnstein) is that significant advantages exist for possessing an IQ toward the top of the range--advantages that pertain to school success, career, and income. The premise is that people with high IQs have naturally acquired scholarly…

Educators, as applied scientists, must work in partnership with investigative scientists who are researching brain functions in order to reach a better understanding of gifted students and students who are intelligent but do not learn. Improper understanding of brain functions can cause gross errors in educational placement. Until recently, the…

Confirmatory analyses on the Hong Kong Wechsler Intelligence Scale for Children (HK-WISC) provided support for composite score interpretation based on the two- and three-dimensional models across age levels. Test sample was comprised of 1,100 children, ranging in age from 5 to 15 years at all 11 age levels specified by the HK-WISC. (KW)