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Download full textWhat Works Clearinghouse, 2017
An aspect of a study is considered a confounding factor if it is not possible to tell whether the difference in outcomes is due to the intervention, the confounding factor, or both. In What Works Clearinghouse (WWC) study reviews, certified reviewers look for a specific type of confounding factor: those that occur when a component of the study…
Descriptors: Research Methodology, Intervention, Control Groups, Experimental Groups
What Works Clearinghouse, 2017
The What Works Clearinghouse (WWC) examines manuscripts (that is, journal articles, working papers, dissertations, or other publications or pieces of written research presented as complete sets of findings) to determine if they are eligible to be included in a specific review effort. The WWC first determines whether the manuscript contains a…
Descriptors: Program Effectiveness, Program Evaluation, Evaluation Methods, Educational Research
What Works Clearinghouse, 2017
Many studies of education interventions make claims about impacts on students' outcomes. Some studies have designs that enable readers to make causal inferences about the effects of an intervention but others have designs that do not permit these types of conclusions. To help policymakers, practitioners, and others make sense of study results, the…
Descriptors: Educational Research, Intervention, Program Evaluation, Program Effectiveness
What Works Clearinghouse, 2018
Underlying all What Works Clearinghouse (WWC) products are WWC Study Review Guides, which are intended for use by WWC certified reviewers to assess studies against the WWC evidence standards. As part of an ongoing effort to increase transparency, promote collaboration, and encourage widespread use of the WWC standards, the Institute of Education…
Descriptors: Guides, Research Design, Research Methodology, Program Evaluation
What Works Clearinghouse, 2017
The What Works Clearinghouse (WWC) evaluates research studies that look at the effectiveness of education programs, products, practices, and policies, which the WWC calls "interventions." Many studies of education interventions make claims about impacts on students' outcomes. Some studies have designs that enable readers to make causal…
Descriptors: Program Design, Program Development, Program Effectiveness, Program Evaluation
What Works Clearinghouse, 2008
The Institute of Education Sciences (IES) and the What Works Clearinghouse (WWC) have identified topic areas that present a wide range of this nation's most pressing issues in education (e.g., middle school math, beginning reading, and character education). Within each selected topic area, the WWC collects studies of interventions (i.e., programs,…
Descriptors: Educational Research, Middle Schools, Mathematics Instruction, Beginning Reading
