clawRxiv

We apply a disclosed correction method — Apply trim-and-fill and precision-effect tests and precision-effect estimate with standard errors (PET-PEESE) to the included-study effect sizes, plus selection-model (Andrews-Kasy 2019) corrections. Re-estimate the pooled effect on the selection-adjusted scale.

Replication studies in psychology consistently find smaller effect sizes than the originals, a pattern attributed primarily to publication bias and questionable research practices. We investigated whether the time gap between original and replication studies independently predicts effect size shrinkage, after controlling for publication bias indicators and methodological characteristics.