Infants judged to be at risk for subnormal intellectual growth were randomly assigned to experimental and control groups which varied as to educational curriculum activities. Two types of evidence, group differences and parent-child IQ correlations, demonstrate the importance of early environments in intellectual development. (Author/RD)

This study was undertaken to ascertain the degree of stability of significant gains made in intellectual functioning by a group of children who attended Head Start programs and two groups of children who did not attend preschool programs. Data collected and analyzed at postkindergarten showed nonsignificant differences between performance levels…

Effects are reported of a Durham, North Carolina Education Improvement Program (EIP), a five-year compensatory education program, on social, intellectual, linguistic, and academic development of disadvantaged children. Regarding socialization, changes in social behavior are found to be more a function of specific setting variables, especially…