Studies the relationship between social class and intelligence age five among 400 children of mature birthweight and without significant prenatal complications, in order to identify variables which would statistically account for the influence of social class upon I.Q. (Author/JM)

Though some unexpected sex differences were discovered, the two diagnostic categories were not found to be psychometrically distinct. Further, the results of a longitudinal analysis suggested that, while IQ scores remained relatively stable over time within a subset of the original sample, achievement scores definitely declined. (Author)

Reports on the findings of a comparative study of mental abilities of Mexican and American children. Discusses age, sex, social class, and urban-rural differences, as well as cultural differences. (SS)

Some specific intellectual abilities show consistent sex differences which vary in degree according to types of tests and samples examined. Reviews the empirical support for these differences, as well as the methodological difficulties, data and sampling limitations, interpretative biases, and contradictory results of much of the sex-difference…

The longitudinal study examined the dropout rate of a group of Chicano students who were registered 7th graders in the Tooele School District in the 1967-68 school year. If these students made normal progress, they graduated from high school at the end of the 1972-73 school year. All Spanish-surname students found on the 7th grade rosters of…

The academic careers of three groups of children were followed from grade 1 to grade 12 to determine the effectiveness of early school admission criteria. Children with chronological ages of less than 5 years, 7 months could qualify for early admission into first grade if they achieved a mental age of six years on the Stanford Binet, Form L. Group…

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 examines cultural bias in the Wechsler Intelligence Scale for Children. Results indicated no evidence of specific factors peculiar to Blacks v Whites, and rank order of item difficulties was similar in both groups. Race differences were due to differences in mental maturity rather than to test bias. (Author/RD)

IN THE LONGITUDINAL BERKELEY GROWTH STUDY, SUBJECTS WERE TESTED AT 16, 18, 21, AND 26 YEARS ON THE WECHSLER-BELLEVUE, AND AT 36 YEARS ON THE WECHSLER ADULT INTELLIGENCE SCALE, WHICH CONTAIN BOTH VERBAL AND NON-VERBAL SUBSCALES. THE MOST CONSISTENT INCREASES IN MEAN SCORES OVER THE PERIOD WERE IN INFORMATION, VOCABULARY, AND COMPREHENSION. DIGIT…