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Abstract:
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This paper describes the nonresponse patterns among the participants in the Early Head Start Research and Evaluation Project, a Congressionally mandated random assignment study that began in 1995. Across the 17 study sites, 3,001 infants and their families were randomized at the time of enrollment to be in the program or control group. The program group children were allowed to participate in the Early Head Start program in their site; the control group children were not. Information was collected by program staff at baseline, and the children were followed up by research staff when children were 14, 24, and 36 months of age, and in pre-kindergarten. To better understand response patterns across waves, the paper looks at how the retained sample differs from the baseline sample, and the patterning of loss; that is, how attrition differed (if at all) between the program and control groups.
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