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Clinical trials are routinely preregistered. In psychology and the social sciences, however, only a small percentage of studies are preregistered, and those preregistrations often contain ambiguities. As advocates strive for broader uptake and …

I must admit that when I first heard of the effort to get psychological scientists to preregister their studies (that is, to submit to a journal a study’s hypotheses and a plan for how the data will be analyzed before that study has been run), I had …