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Mapping the universe of registered reports

Registered reports present a substantial departure from traditional publishing models with the goal of enhancing the transparency and credibility of the scientific literature. We map the evolving universe of registered reports to assess their growth, implementation and shortcomings at journals across scientific disciplines.

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Fig. 1: An idealized publication pipeline for registered reports.

Center for Open Science

Fig. 2: The rise of registered reports and access to IPA protocols.

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All data and materials related to this study are publicly available on the Open Science Framework (


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We thank the journal editors who took the time to participate in our survey. The Center for Open Science, D. Mellor, T. Errington, C. Chambers and The Registered Reports Steering Committee all provided valuable information and feedback on the study. This work was supported in part by a general support grant to METRICS from the Laura and John Arnold Foundation. The funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript

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Authors and Affiliations



T.E.H. and J.P.A.I. designed the study. T.E.H. conducted the data collection and performed the data analysis. T.E.H. and J.P.A.I. wrote the manuscript.

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Correspondence to Tom E. Hardwicke.

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The authors declare no competing interests.

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Supplementary Methods, Supplementary Results, Supplementary references

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Supplementary Table 1

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Hardwicke, T.E., Ioannidis, J.P.A. Mapping the universe of registered reports. Nat Hum Behav 2, 793–796 (2018).

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