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Feller, Avi; Grindal, Todd; Miratrix, Luke; Page, Lindsay C. – Society for Research on Educational Effectiveness, 2014
Head Start programs currently provide early childhood education and family support services to more than 900,000 low-income children and their families across the United States with an annual budget of around $8 billion in state and federal funds. Researchers and policy makers have debated the program's effectiveness since its inception in 1964.…
Descriptors: Early Intervention, Disadvantaged Youth, Child Care, Environmental Influences
Unlu, Fatih; Bozzi, Laurie; Layzer, Carolyn; Smith, Arthur; Price, Cristofer; Hurtig, Richard – Society for Research on Educational Effectiveness, 2013
In experimental studies, researchers are often interested in secondary research questions that explore important aspects of main findings, such as whether or not program effects vary according to the level of fidelity in which the program has been implemented; or according to the dosage received by individuals participated in the program. In this…
Descriptors: Fidelity, Program Implementation, Randomized Controlled Trials, Research Problems

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