This paper presents and evaluates the broad results of pre-school intervention experiments and programs aimed at fostering the intellectual and social development of "disadvantaged" groups. Among the general findings discussed are (1) there is a "sensitive," or even "critical," period in child development, an age at…

This paper challenges those involved in early childhood education to reexamine unquestioned assumptions concerning the benefits of early schooling. A synergic effect is posited by bringing together research areas that had formerly remained somewhat autonomous: Neurophysiology, vision, hearing, parent attitudes, affective domain, comparative school…

Patterns of cognitive, affective, and social growth of elementary school children are described and the school and home variables which influence such growth are identified in this longitudinal study. This final report presents the final instruments and the interpretive data associated with them. The study permits the tracing of developmental…