2024-11-27 ミュンヘン大学(LMU)
<関連情報>
- https://www.lmu.de/en/newsroom/news-overview/news/infants-have-no-conception-of-morality.html
- https://onlinelibrary.wiley.com/doi/10.1111/desc.13581
乳児のヘルパーとハインダーの社会的評価: 大規模、多研究室、協調的再現研究 Infants’ Social Evaluation of Helpers and Hinderers: A Large-Scale, Multi-Lab, Coordinated Replication Study
Kelsey Lucca, Francis Yuen, Yiyi Wang, Nicolás Alessandroni, Olivia Allison, Mario Alvarez, Emma L. Axelsson, Janina Baumer, Heidi A. Baumgartner, Julie Bertels, Mitali Bhavsar …
Developmental Science Published: 26 November 2024
DOI:https://doi.org/10.1111/desc.13581
ABSTRACT
Evaluating whether someone’s behavior is praiseworthy or blameworthy is a fundamental human trait. A seminal study by Hamlin and colleagues in 2007 suggested that the ability to form social evaluations based on third-party interactions emerges within the first year of life: infants preferred a character who helped, over hindered, another who tried but failed to climb a hill. This sparked a new line of inquiry into the origins of social evaluations; however, replication attempts have yielded mixed results. We present a preregistered, multi-laboratory, standardized study aimed at replicating infants’ preference for Helpers over Hinderers. We intended to (1) provide a precise estimate of the effect size of infants’ preference for Helpers over Hinderers, and (2) determine the degree to which preferences are based on social information. Using the ManyBabies framework for big team-based science, we tested 1018 infants (567 included, 5.5–10.5 months) from 37 labs across five continents. Overall, 49.34% of infants preferred Helpers over Hinderers in the social condition, and 55.85% preferred characters who pushed up, versus down, an inanimate object in the nonsocial condition; neither proportion differed from chance or from each other. This study provides evidence against infants’ prosocial preferences in the hill paradigm, suggesting the effect size is weaker, absent, and/or develops later than previously estimated. As the first of its kind, this study serves as a proof-of-concept for using active behavioral measures (e.g., manual choice) in large-scale, multi-lab projects studying infants.
