Are Underpowered Studies Ever Justified?

Is a small scientific study better than none at all? A provocative piece in Frontiers in Psychology raises the question of whether we should ever do under-powered studies. The authors are Dutch researchers Rik Crutzen and Gjalt-Jorn Y. Peters.

Crutzen and Peters begin by questioning the idea that even a little evidence is always valuable. Taking the example of a study that only manages to recruit a handful of patients because it’s studying a rare disease, the authors say that:

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