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Do normative scientific practices and incentive structures produce a biased body of research evidence?

The Reproducibility Project: Psychology is a crowdsourced empirical effort to estimate the reproducibility of a sample of studies from scientific literature. The project is a large-scale, open collaboration currently involving more than 150 scientists from around the world.

The investigation is currently sampling from the 2008 issues of three prominent psychology journals - Journal of Personality and Social Psychology, Psychological Science, and Journal of Experimental Psychology: Learning, Memory, and Cognition. Individuals or teams of scientists follow a structured protocol for designing and conducting a close, high-powered replication of a key effect from the selected articles.

We expect to learn about:

  • The overall rate of reproducibility in a sample of the published psychology literature
  • Obstacles that arise in conducting effective replications of original study procedures
  • Predictors of replication success, such as the journal in which the original finding was published, the citation impact of the original report, and the number of direct or conceptual replications that have been published elsewhere
  • Aspects of a procedure that are or are not critical to a successful direct replication, such as the setting, specific characteristics of the sample, or details of the materials.


All RP:P replications can be accessed from the RP:P overview page.

To navigate the replication process, use the Researcher Guide—outlined in the left sidebar.

More information can be found in the FAQ section or by browsing the wiki pages in the left sidebar.

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