Investigated mediators of effects of preschool intervention on children's school achievement in sixth grade. Found that preschool participation was significantly associated with higher reading achievement, higher math achievement, and with lower incidence of grade retention. Cognitive readiness and parent involvement in school significantly…

Evaluated effects of Chicago Child-Parent Center and Expansion Program on 559 low-income, inner-city African American children. Found that program participation for two or three years after preschool and kindergarten was associated with higher reading achievement up to seventh grade and lower cumulative grade retention and special education…

Examined effects of time-limited welfare on children ages 5- to 17-years at a 4-year follow-up. Found that effects were moderated by families' risk of long-term welfare dependency. Found few effects for children of parents most likely to reach the welfare time limit. Found consistent negative effects for children of parents with the largest…