Journal
ROYAL SOCIETY OPEN SCIENCE
Volume 7, Issue 4, Pages -Publisher
ROYAL SOC
DOI: 10.1098/rsos.191795
Keywords
social evaluation; infant cognition; manual choice paradigm; moral judgement; partner choice
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Funding
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [742231]
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Hamlin et al. found in 2007 that preverbal infants displayed a preference for helpers over hinderers. The robustness of this finding and the conditions under which infant sociomoral evaluation can be elicited has since been debated. Here, we conducted a replication of the original study, in which we tested 14- to 16-month-olds using a familiarization procedure with three-dimensional animated video stimuli. Unlike previous replication attempts, ours uniquely benefited from detailed procedural advice by Hamlin. In contrast with the original results, only 16 out of 32 infants (50%) in our study reached for the helper; thus, we were not able to replicate the findings. A possible reason for this failure is that infants' preference for prosocial agents may not be reliably elicited with the procedure and stimuli adopted. Alternatively, the effect size of infants' preference may be smaller than originally estimated. The study addresses ongoing methodological debates on the replicability of influential findings in infant cognition.
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