Project Overview

  • Status: COMPLETE
  • 37 participating labs collected data in 18 countries on 5 continents
  • 1018 babies tested
  • 94 authors on Developmental Science publication

In this project we investigate a fundamental aspect of human nature: evaluating others’ actions as praiseworthy or blameworthy. We do so in a closely coordinated, multi-laboratory, standardized study aimed at replicating the helping/hindering finding reported by Hamlin, Wynn, & Bloom, 2007. Using a video-taped version of the original puppet show, labs from around the world are collecting data from infants between the ages of 5.5 and 10.5 months.

Project Leads

MB4 Contributors

NOTE: Default table ordering is by author order in the Stage 2 publication. You can filter, group, and/or sort entries by any field.

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Publications

Stage 1 Registered Report

Lucca, K.*, Yuen, F.*, Byers-Heinlein, K., Capelier-Mourguy, A., Cirelli, L. K., Ben, R. D., Frank, M. C., Henderson, A. M. E., Kominsky, J. F., Liberman, Z., Margoni, F., Reschke, P. J., Schlingloff, L., Scott, K., Soderstrom, M., Sommerville, J., Su, Y., Tatone, D., Uzefovsky, F., … Hamlin, J. K. (2024). Infants’ Social Evaluation of Helpers and Hinderers: A Large-Scale, Multi-Lab, Coordinated Replication Study. (*co-first authors) [PsyArXiv preprint]

Stage 2 Registered Report

Lucca, K.*, Yuen, F.*, Wang, Y., Alessandroni, N., Allison, O., Alvarez, M., Axelsson, E. L., Baumer, J., Baumgartner, H. A., Bertels, J., Bhavsar, M., Byers-Heinlein, K., Capelier-Mourguy, A., Chijiiwa, H., Chin, C. S.-S., Christner, N., Cirelli, L. K., Corbit, J., Daum, M. M., … Hamlin, J. K. (2025). Infants’ Social Evaluation of Helpers and Hinderers: A Large-Scale, Multi-Lab, Coordinated Replication Study. Developmental Science, 28(1). https://doi.org/10.1111/desc.13581. (*co-first authors)

To cite, use (Lucca, Yuen, et al., 2025)

Spin-off Projects