Presents a study of a theoretical confluence model which predicts the effects of birth order, child spacing and family size on intellectual development. The fit of this model was tested on samples of families with biological and adopted children. (JMB)

It was concluded that while retinoblastoma per se is not associated with intellectual superiority or inferiority, retinoblastoma associated with blindness may result in selective cognitive superiority. (Authors)

The effects of father absence on educational achievement and intellectual development of 6- to 11-year-old children were investigated by employing a nationally representative sample of 5,493 father-present and 616 father-absent children from the Health Examination Survey of the National Center for Health Statistics. (Author/RH)

Investigates levels and patterns of intellectual development of 131 socioeconomically disadvantaged children in university-based intervention group day care or community day care, or with little or no day care. Results suggest that high quality day care may positively change the intellectual development of socioeconomically disadvantaged children.…

Examined differences in intelligence test scores of black and white five-year-olds born premature with low birth weight. Found that black children's IQ scores were 1 SD lower than those of white children. Adjustments for ethnic differences in poverty reduced the differential by half; adjustments for differences in home environment reduced it by…