Study looks at pigtailed macaque in the context of visual recognition problems adapted from a standardized test developed for use with human infants. Results demonstrate that the low-risk group easily differentiated novel from previously seen targets; the high-risk group gave no evidence of recognition. (Author/RWB)

Within a longitudinal design, the present study assessed parental attitudes, quality of stimulation in the environment, historical factors, and children's temperament to identify determinants of cognitive ability at 54 months. Children (n=147) were randomly assigned to one of three treatment groups: a center-based intervention, a home-based…

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.…

The Infant Health and Development Program was an eight-site randomized controlled trial of comprehensive early intervention for low birthweight, premature infants from birth to age three. Higher mental development and IQ were associated with high levels of intervention participation at 24 and 36 (but not 12) months. A dose-response relation…