Diffusion of responsibility attenuates altruistic punishment: A functional magnetic resonance imaging effective connectivity study
- 26 November 2015
- journal article
- Published by Wiley in Human Brain Mapping
- Vol. 37 (2), 663-677
- https://doi.org/10.1002/hbm.23057
Abstract
Humans altruistically punish violators of social norms to enforce cooperation and pro‐social behaviors. However, such altruistic behaviors diminish when others are present, due to a diffusion of responsibility. We investigated the neural signatures underlying the modulations of diffusion of responsibility on altruistic punishment, conjoining a third‐party punishment task with event‐related functional magnetic resonance imaging and multivariate Granger causality mapping. In our study, participants acted as impartial third‐party decision‐makers and decided how to punish norm violations under two different social contexts: alone (i.e., full responsibility) or in the presence of putative other third‐party decision makers (i.e., diffused responsibility). Our behavioral results demonstrated that the diffusion of responsibility served as a mediator of context‐dependent punishment. In the presence of putative others, participants who felt less responsible also punished less severely in response to norm violations. Our neural results revealed that underlying this behavioral effect was a network of interconnected brain regions. For unfair relative to fair splits, the presence of others led to attenuated responses in brain regions implicated in signaling norm violations (e.g., AI) and to increased responses in brain regions implicated in calculating values of norm violations (e.g., vmPFC, precuneus) and mentalizing about others (dmPFC). The dmPFC acted as the driver of the punishment network, modulating target regions, such as AI, vmPFC, and precuneus, to adjust altruistic punishment behavior. Our results uncovered the neural basis of the influence of diffusion of responsibility on altruistic punishment and highlighted the role of the mentalizing network in this important phenomenon. Hum Brain Mapp 37:663–677, 2016.Keywords
Funding Information
- National Natural Science Foundation of China (31530031, 81471376)
This publication has 92 references indexed in Scilit:
- Social economic decision-making across the lifespan: An fMRI investigationNeuropsychologia, 2012
- Equitable decision making is associated with neural markers of intrinsic valueProceedings of the National Academy of Sciences of the United States of America, 2011
- Dynamic modeling of neuronal responses in fMRI using cubature Kalman filteringNeuroImage, 2011
- Effect of hemodynamic variability on Granger causality analysis of fMRINeuroImage, 2010
- Saliency, switching, attention and control: a network model of insula functionBrain Structure and Function, 2010
- Type I and Type II error concerns in fMRI research: re-balancing the scaleSocial Cognitive and Affective Neuroscience, 2009
- Circular analysis in systems neuroscience: the dangers of double dippingNature Neuroscience, 2009
- Dissociable neural representations of future reward magnitude and delay during temporal discountingNeuroImage, 2009
- Effective connectivity during haptic perception: A study using Granger causality analysis of functional magnetic resonance imaging dataNeuroImage, 2008
- Region of interest analysis for fMRISocial Cognitive and Affective Neuroscience, 2007