Diminishing parochialism in intergroup conflict by disrupting the right temporo-parietal junction.

Baumgartner, Thomas; Schiller, Bastian; Rieskamp, Jörg; Gianotti, Lorena; Knoch, Daria (2014). Diminishing parochialism in intergroup conflict by disrupting the right temporo-parietal junction. Social cognitive and affective neuroscience, 9(5), pp. 653-660. Oxford University Press 10.1093/scan/nst023

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Individuals react to violation of social norms by outgroup members differently than to transgressions of those same norms by ingroup members: namely outgroup perpetrators are punished much more harshly than ingroup perpetrators. This parochial punishment pattern has been observed and extensively studied in social psychology and behavioral economics. Despite progress in recent years, however, little is known about the neural underpinnings of this intergroup bias. Here, we demonstrate by means of transcranial magnetic stimulation (TMS) that the transient disruption of the right, but not the left temporo-parietal junction (TPJ), reduces parochial punishment in a third-party punishment paradigm with real social groups. Moreover, we show that this observed TMS effect on parochial punishment is mediated by a classical punishment motive, i.e. retaliation. Finally, our data suggests that a change in perspective-taking might be the underlying mechanism that explains the impact of right TPJ disruption on retaliation motivation and parochial punishment. These findings provide the first causal evidence that the right TPJ plays a pivotal role in the implementation of parochial behaviors.

Item Type:

Journal Article (Original Article)


07 Faculty of Human Sciences > Institute of Psychology > Social Neuroscience and Social Psychology

UniBE Contributor:

Baumgartner, Thomas, Gianotti, Lorena, Knoch, Daria


100 Philosophy > 150 Psychology




Oxford University Press




Thomas Baumgartner

Date Deposited:

06 Oct 2014 09:04

Last Modified:

05 Dec 2022 14:36

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

ingroup love, intergroup bias, normative behavior, outgroup hostility, parochialism, temporo-parietal junction, third-party punishment, transcranial magnetic stimulation





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