Live Breaking News & Updates on Statistical Power For Experimental Research Newbury Park

Abstract: Recently released results from the Head Start Impact Study indicate that the benefits of participating in Head Start almost completely disappear by first grade. While other studies have previously assessed Head Start's effectiveness, this is the only study that used a rigorous experimental design. Given this strongly negative evaluation, Congress should reconsider spending more than $9 billion per year on a program that produces few positive lasting effects. ....

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