List of terms

    Many Labs

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    Definition

    A series of crowdsourced replication projects in which independent research teams use shared study protocols to examine the replicability of published psychological effects and variation in results across samples and settings. The first project, Many Labs 1 (Klein et al., 2014), tested 13 effects across 36 independent samples involving 6,344 participants. It was followed by Many Labs 2 (Klein et al., 2018) and further projects investigating different facets of replicability. Similar collaborative initiatives include ManyBabies, EEGManyLabs, and the Psychological Science Accelerator.

    Related terms: Collaboration, Many analysts, Many Labs I, Many Labs II, Open Science Collaboration, Replication

    References:

    • Ebersole, C. R., Atherton, O. E., Belanger, A. L., et al. (2016). Many Labs 3: Evaluating participant pool quality across the academic semester via replication. Journal of Experimental Social Psychology, 67, 68–82. https://doi.org/10.1016/j.jesp.2015.10.012
    • Frank, M. C., Bergelson, E., Bergmann, C., et al. (2017). A Collaborative Approach to Infant Research: Promoting Reproducibility, Best Practices, and Theory-Building. Infancy, 22, 421–435. https://doi.org/10.1111/infa.12182
    • Klein, R. A., Ratliff, K. A., Vianello, M., et al. (2014). Investigating variation in replicability: A “many labs” replication project. Social Psychology, 45, 142–152. https://doi.org/10.1027/1864-9335/a000178
    • Klein, R. A., Vianello, M., Hasselman, F., et al. (2018). Many Labs 2: Investigating Variation in Replicability Across Samples and Settings. Advances in Methods and Practices in Psychological Science, 1(4), 443–490. https://doi.org/10.1177/2515245918810225
    • Moshontz, H., Campbell, L., Ebersole, C. R., et al. (2018). The Psychological Science Accelerator: Advancing psychology through a distributed collaborative network. Advances in Methods and Practices in Psychological Science, 1(4), 501–515. https://doi.org/10.1177/2515245918797607
    • Open Science Collaboration. (2015). Estimating the reproducibility of psychological science. Science, 349(6251), aac4716. https://doi.org/10.1126/science.aac4716
    • Pavlov, Y. G., Adamian, N., Appelhoff, S., et al. (2020). #EEGManyLabs: Investigating the Replicability of Influential EEG Experiments. PsyArXiv Preprint. https://doi.org/10.31234/osf.io/528nr

    Originally drafted by: Sam Parsons

    Reviewed by: Helena Hartmann, Charlotte R. Pennington, Mirela Zaneva

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