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Averaging Effect Sizes Within And Across Studies Of Interventions Aimed At Improving Child Outcomes, Rebecca Maynard, Nianbo Dong, Irma Perez-Johnson
Averaging Effect Sizes Within And Across Studies Of Interventions Aimed At Improving Child Outcomes, Rebecca Maynard, Nianbo Dong, Irma Perez-Johnson
REBECCA A MAYNARD
ABSTRACT—Scientific and political forces are moving the social services field toward greater reliance on evidence-based interventions or strategies, including in the area of child development. This article draws on the work of meta-analysts to illustrate how study findings can sometimes be made more accessible to policy makers and practitioners by converting them to effect sizes and averaging them within or across studies. The article first introduces the concept of an effect size. Using empirical examples, it then illustrates the mechanics of computing average effect sizes and discusses their benefits and limitations as summary measures of the estimated effects of interventions. …
Impacts Of After-School Programs On Student Outcomes, Susan Zief, Rebecca Maynard, Sherri Lauver
Impacts Of After-School Programs On Student Outcomes, Susan Zief, Rebecca Maynard, Sherri Lauver
REBECCA A MAYNARD
This review examines the evidence from recent experimental design evaluations on the impact of after-school programming on youth context (i.e., student location, supervision, and safety); participation in activities; and behavioral, social and emotional, and academic outcomes. This review focuses on program models that are of particular interest to policymakers—programs that include academic support services—for two main reasons. First, 21st CCLC grantees are expected to incorporate academic support services into their programming, and it is likely that a large percentage of after-school programs are now funded with 21st CCLC grants. Second, as part of the No Child Left Behind legislation, the …