The cumulative deficit hypothesis with respect to age decrement in IQ was investigated in large samples of white and black school children in rural Georgia between the ages of 5 and 18. The cumulative deficits hypothesis suggests that the increasing decrement in mental test scores, relative to population norms, is a function of age in groups…

A study examined the impact of a gifted enrichment program on 80 Israeli students (grades 4-8) from disadvantaged neighborhoods. After program participation, girls' performance on an intelligence test was higher than boys'. While girls started out with slightly lower scores, they ended up with slightly higher scores than boys. (Contains…

Literature is reviewed on the effects of genetic and environmental contributions to children's intellectual functioning and the effects of preventive intervention on intellectual outcomes for high-risk children. Longitudinal case studies of two socioeconomically disadvantaged mothers with cognitive deficits are examined, along with interventions…

Innovative programs of school reform and research for diverse student populations have tended to focus on specific cultural, linguistic, or ethnic populations and on specific local communities. Findings from this body of research over the years have resulted in a core of principles for designing and implementing programs for at-risk students. Five…