The authors are emmersed in a comprehensive review of the literature on intellectual sex differences. This paper consists of the first progress report and the tentative hypotheses of the work completed so far. Discussion is initially concerned with verbal and spatial abilities. It is concluded that girls learn language earlier, and may continue to…

This paper considers the role of intelligence in lifetime achievement, noting the importance not only of general cognitive ability but also abilities not measured by standardized intelligence tests. It urges educators of the gifted to utilize their knowledge of intelligence and talent development to challenge the one-dimensional conception of…

An approach to intelligence which emphasizes domain-specific constraints on knowledge structures is compared to information processing approaches. The evaluation of any cognitive ability as being intelligent crucially depends on prior specification of the formal constraints on the domains of knowledge from which that ability originates. (Author/RD)

A model of the sources of differences in the learning potentials of students is presented, including group differences in learning potentials between gifted and nongifted students; interindividual differences between gifted students; intraindividual differences within one gifted student; and independent and interactive contributions of…

Intended as a nontechnical review of current scientific knowledge in the field, this essay considers the nature of primary and secondary intellectual abilities, plus the major features of, and the development of individual differences in, the skills and capacities constituting intelligence. Part of a theme issue on intelligence. (Author/SJL)

Cognitive style identifies the ways individuals react to different situations. Cognitive styles include stable attitudes, preferences, or habitual strategies that distinguish the individual styles of perceiving, remembering, thinking, and solving problems. Intended for researchers, psychologists, child development specialists, and early childhood…

The research described in this article addressed the question of why siblings commonly have different developmental outcomes despite their common beginnings. The studies analyzed behavioral development, especially through examination of deviant behaviors and intellectual development, by tracing siblings' different life histories. The work is based…