Proposes a developmental theory of sex differences in intelligence that states that the faster maturation and brain size growth in girls up to age 15 compensates for their smaller brain size so that sex differences in intelligence are very small. Discusses evidence that supports this theory. (SLD)

Raw scores on WISC-R subtests and the verbal, performance, and full scale IQ scales were correlated with age separately for White and Black males and females. The relationship between age and intelligence test performance was constant across race and sex and supports the construct validity of the WISC-R. (Author/RD)

A comparative factor analysis on intelligence data from four sex-by-generation groups was performed using the LISREL model. Spatial and verbal factors were isolated. Results were consistent with the hypothesis that males and females have similar intellectual structure. There were sex and generational differences in spatial and verbal factor means.…

Psychometric intelligence and adaptive competence constructs were compared in five- to seven-year-old children in a rural Phillippine barrio. Individualized psychometric subtests of intelligence, indigenous with respect to content, and a form for obtaining adults' ratings of children's adaptive competencies, were developed. (Author/LMO)

Students of high intellectual ability and their parents were tested on a battery of cognitive tests. Vernon's model of intelligence best fit results. A verbal-educational and a practical-spatial-mechanical factor explained most performance variance. Among children, age related to verbal but not spatial or mechanical abilities. (Author/RD)