Less than 50pct of Psychology research were successfully replicated by preregistered studies

Röseler, Lukas, Taisia Gendlina, Josefine Krapp, Noemi Labusch, and Astrid Schütz. 2022. “Successes and Failures of Replications: A Meta-analysis of Independent Replication Studies Based on the OSF Registries.” MetaArXiv. August 16. doi:10.31222/osf.io/8psw2

Abstract: A considerable proportion of psychological research has not been replicable, and estimates range from 9% to 77% for nonreplicable results. The extent to which vast proportions of studies in the field are replicable is still unknown, as researchers lack incentives for publishing individual replication studies. When preregistering replication studies via the Open Science Foundation website (OSF, osf.io), researchers can publicly register their results without having to publish them and thus circumvent file-drawer effects. We analyzed data from 139 replication studies for which the results were publicly registered on the OSF and found that out of 62 reports that included the authors’ assessments, 23 were categorized as “informative failures to replicate” by the original authors. 24 studies allowed for comparisons between the original and replication effect sizes, and whereas 75% of the original effects were statistically significant, only 30% of the replication effects were. The replication effects were also significantly smaller than the original effects (approx. 38% the size). Replication closeness did not moderate the difference between the original and the replication effects. Our results provide a glimpse into estimating replicability for studies from a wide range of psychological fields chosen for replication by independent groups of researchers. We invite researchers to browse the Replication Database (ReD) ShinyApp, which we created to check for whether seminal studies from their respective fields have been replicated. Our data and code are available online: https://osf.io/9r62x