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Oxytocin, individual differences, and trust game behavior: a registered large-scale replicationuse asterix (*) to get italics
Charlotte F. Kroll, Koen Schruers, Wolfgang Viechtbauer, Claudia Vingerhoets, Leonie Seidel, Arno Riedl, and Dennis Hernaus
<p>The neuropeptide oxytocin (OXT) is thought to modulate important aspects of prosocial behavior. In a seminal paper, Kosfeld et al. (2005) reported that intranasally administered OXT modulated trusting behavior in an economic trust game. Several attempts to conceptually replicate these findings yielded mixed results, which might be partly due to small sample sizes that can reduce the ability to detect, or reject, meaningful effects. Here, we propose to perform a large-scale replication (N=220) of Kosfeld et al. (2005) with specific attention for small effects and subpopulations whose trusting behavior may be sensitive to OXT manipulations. Moreover, we will conduct the largest-ever pooled analysis by merging our data with data from a previous replication by Declerck et al. (2020). Using additional (equivalence) analyses, we aim to refute effect sizes of OXT on interpersonal trust that will not be worthwhile pursuing in most lab-based contexts. Our study will contribute to a more refined understanding of OXT’s involvement in human social behavior, for example by identifying boundary conditions that will delineate when OXT-induced effects on prosocial behavior may occur. Critically, we anticipate that our work will offer a more realistic perspective on the effect sizes that can be expected when using intranasal OXT to modulate prosocial behavior.</p>
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Oxytocin, trust game, replication, individual differences, pooled analysis
Life Sciences, Social sciences
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2022-11-25 18:07:23
Romain Espinosa