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Results from half of psychology studies cannot be replicated

MediaTricks | January 24, 2022

Psychology is a disaster.

News article screenshot from The Atlantic: "Psychology’s Replication Crisis Is Running Out of Excuses"

Another big project has found that only half of studies can be repeated. And this time, the usual explanations fall flat.

Over the past few years, an international team of almost 200 psychologists has been trying to repeat a set of previously published experiments from its field, to see if it can get the same results. Despite its best efforts, the project, called Many Labs 2, has only succeeded in 14 out of 28 cases. Six years ago, that might have been shocking. Now it comes as expected (if still somewhat disturbing) news.

In recent years, it has become painfully clear that psychology is facing a “reproducibility crisis,” in which even famous, long-established phenomena—the stuff of textbooks and ted Talks—might not be real. There’s social priming, where subliminal exposures can influence our behavior. And ego depletion, the idea that we have a limited supply of willpower that can be exhausted. And the facial-feedback hypothesis, which simply says that smiling makes us feel happier.

One by one, researchers have tried to repeat the classic experiments behind these well-known effects—and failed. And whenever psychologists undertake large projects, like Many Labs 2, in which they replicate past experiments en masse, they typically succeed, on average, half of the time.

Ironically enough, it seems that one of the most reliable findings in psychology is that only half of psychological studies can be successfully repeated.

That failure rate is especially galling, says Simine Vazire from the University of California at Davis, because the Many Labs 2 teams tried to replicate studies that had made a big splash and been highly cited. Psychologists “should admit we haven’t been producing results that are as robust as we’d hoped, or as we’d been advertising them to be in the media or to policy makers,” she says. “That might risk undermining our credibility in the short run, but denying this problem in the face of such strong evidence will do more damage in the long run.”

Categories: Psychological, Science Tags: experiment

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