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Expecting and Learning From Null Results
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DOI：10.3102/0013189X19891440.png)
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This commentary addresses three issues raised in the articles in this issue. First, conversations about replication efforts should begin with a reasonable and agreed-upon definition of what it means to say that a study did or did not replicate the results of another study. Second, if a replication failure has been identified, using the surface similarity of the studies to reverse-engineer an explanation is unlikely to be helpful. Finally, researchers and consumers should expect small and heterogeneous effects, and this fact points to the need to think meta-analytically.
Keyword:
complex interventions
meta-analysis
replication
systematic review
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