84% of preregistered studies deviated from plan; 17 disclosed nothing

RexDouglass · x · 2026-09-26

An audit of preregistration practices found 74.6% of articles included at least one preregistered study, yet 84% of those 42 deviated from the preregistered plan — and 17 of them disclosed none of their deviations, underscoring how often preregistration is honored in the breach.

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