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Direct linkJeffrey C. Valentine – Journal of Research on Educational Effectiveness, 2024
Published studies of intervention effects probably report effect sizes that are larger than the true effect size. There are probably many reasons for this, but one can be thought of as a "winner's curse." In this essay, I discuss evidence from two recent studies that highlight how evidence clearinghouses might inadvertently expose…
Descriptors: Clearinghouses, Evidence, Evaluation Criteria, Replication (Evaluation)
