Preschoolers at high risk for intellectual impairment were enrolled in an educational day care program. Repeated testing, with a control group, demonstrated that such a program could lessen the incidence of retardation. (DM)

Written for a variety of audiences, this volume describes the University of Western Ontario Preschool Project in sufficient detail to permit its replication; findings of formative and summative program evaluations are reported along with research developing new criterion measures of social competence. Begun in 1973, the program was primarily…