Psychology continues to face a replication problem: researchers attempted to reproduce 21 high-profile studies published between 2010 and 2015. Of the 21 tested, only 13 could be replicated, and the effect sizes were about half as strong.

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Psychology continues to face a replication problem: researchers attempted to reproduce 21 high-profile studies published between 2010 and 2015. Of the 21 tested, only 13 could be replicated, and the effect sizes were about half as strong.