Evaluates a two-year intervention program for low income families in which a toy demonstrator modeled verbal interactions with children ages two to four. Contrary to earlier results, finds no detectable program effects in children's IQ, achievement, or school adjustment three years post-program. Considers problems of ensuring that samples are…

A comparative evaluation of the effectiveness of center-based, home-based and parent-based delivery systems for preschool intervention services was undertaken. Over a 5-year period, the Pennsylvania Research in Infant Development and Education Project enrolled more than 170 disadvantaged children in its two principal component programs: the…

This paper summarizes evaluations of 28 preschool intervention programs designed to train parents to prepare their young children for school achievement. Evaluations selected for review were internal assessments by program staffs. The summary is organized around three questions: (1) Do parent training programs affect children's cognitive…