In the summer of 1969, Educational Testing Service (ETS) began identifying the 1,650 3 1/2-year-old children in four sites across the country who would become part of a six-year longitudinal study designed to assess the impact of Head Start. The sites were Lee County, Alabama, St. Louis, Missouri, Trenton, New Jersey, and Portland, Oregon. The…

The Naturalistic Evaluation Methodology presented here rests on a transactionist theory of child development, an ecological view of human behavior and the quasi-clinical method of inquiry. It is intended that the procedures will lead not only to the improvement of the quality of preschool education but will generate knowledge about children's…

As part of the national Head Start Planned Variation Study, this study used a relatively small sample in an intensive evaluation of program implementation in one field community using the Tucson Early Education Model (TEEM). A modified Solomon four-group research design formed the organization framework. Evaluation of six TEEM classrooms and two…