This paper examines the possibility of accelerating the development of intelligence when applying stringent Piagetian standards to evaluate the effects of short- and long-term intervention or instruction programs. The paper reviews previous Genevan and American research that shows that development can be accelerated by means of only a few…

Assessed the effects of preschool education on achievement in primary school for 88 impoverished African American children and their families. Found that the positive effects of a preschool intervention program on intellectual development and academic achievement were maintained through age 12 and that school-age intervention alone was less…