Intelligence quotient (IQ) differences among groups according to sex, and demographic and other variables have been explored for a variety of intelligence tests. This investigation analyzed data from the standardization sample for the 1981 Wechsler Adult Intelligence Scale-Revised (WAIS-R) to determine the relationship of WAIS-R IQs to the…

A study designed to examine biological, sociological, and early maturational correlates of intelligence collected data prospectively, from birth to 15 years of age, on a sample of 987 black children. Multiple indicators of eight independent and three dependent variables were tested in a structural equation model. Altogether, clear sex differences…

This study was conducted to determine how the pattern of learning on an abstract concept, plate tectonics, differed between groups of different cognitive levels, sex, and intelligence quotient (IQ). The intensive time-series design was used to examine the achievement of eighth grade and ninth grade earth science students. The unique characteristic…

Forty adolescents with reading/spelling disabilities were assigned on the basis of IQ/achievement discrepancy scores to either a dyslexic or slow learner group. Significantly more females than males were in the slow learner category. Despite having lower IQs, the slow learning group had higher achievement levels, but group differences on…

Interviews with parents of 30 school-age girls with fragile X syndrome (fraX) and 31 age- and IQ-matched controls concerning autistic behaviors found that girls with fraX had significantly more autistic behaviors than controls, but incidence of autistic behaviors was not correlated with IQ. Anxiety and posterior cerebellar area measures were also…

In this study, students' achievement using three individualized audiotutorial (IAT) biology learning units was investigated. The method of instruction, gender, academic achievement in mathematics and biology, and students' IQ levels were compared. (KR)

The field dependent-independent cognitive style has been noted by researchers to be related to mathematical achievement. Researchers have also noted a relationship between field dependence and measures of intelligence, and between sex and mathematical achievement. A multiple regression framework was used to examine the effects of field dependence,…

For 139 students, algebra prognosis test scores and performance in seventh-grade mathematics best predicted algebra grades in grade eight, whereas IQ, problem solving, and prognosis scores best predicted achievement on a standardized algebra test. No sex difference in achievement scores was found, but girls attained higher percentage grades. (MNS)

Analysis of achievement test scores of 439 tenth-grade students found the hypothesized variables of IQ, socioeconomic status (SES), self-rated motivation, peer-rated studiousness, peer-group status, and parent-rated home environment contributed uniquely to achievement variance; SES, sex, and language medium of instruction were superfluous in the…

Comparison of 150 children (white, black, and Hispanic) in grades 2 through 4 who had been recommended for prereferral intervention found that white children evidenced significantly higher verbal IQs and reaching achievement scores, black children had a higher incidence of behavior problems than Hispanic children, and behavior problems were more…

This study of hyperlexia in 80 children with developmental delays found no significant differences in the frequency of hyperlexia in girls compared with boys; a significantly elevated frequency of hyperlexia in children diagnosed with pervasive developmental disorders (PDD) compared with children with non-PDD diagnoses; and a similar range of IQ…

A public school district in Alabama uses the Otis Lennon School Ability Test (OLSAT) in place of the Wechsler Intelligence Scale for Children (Revised) (WISC-R) as a screening device for students who are referred for possible special education placement. To determine the relationship between the two tests, Pearson product moment correlation…

This study of 640 twins with reading disability and 436 controls (mean age 12) examined external validity of the distinction between specific reading retardation and reading backwardness, in 3 domains: genetic etiology, sex ratio and clinical correlates, and neuropsychological profiles. There was no evidence of differential genetic etiology of the…

To detemine the effectiveness of the Individualized Audio-Tutorial (IAT) method of instruction, an IAT unit in biology was implemented in ninth grade classrooms in an urban school in Israel, and student achievement was measured in relation to gender, academic background in mathematics and biology, and IQ levels. The 180 subjects were randomly…