Neural substrates of male parochial altruism are modulated by testosterone and behavioral strategy
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Neural substrates of male parochial altruism are modulated by testosterone and behavioral strategy. / Reimers, Luise; Büchel, Christian; Diekhof, Esther K.
In: NEUROIMAGE, Vol. 156, 01.08.2017, p. 265-276.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Neural substrates of male parochial altruism are modulated by testosterone and behavioral strategy
AU - Reimers, Luise
AU - Büchel, Christian
AU - Diekhof, Esther K
N1 - Copyright © 2017 Elsevier Inc. All rights reserved.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Parochial altruism refers to ingroup favoritism and outgroup hostility and has recently been linked to testosterone. Here, we investigated the neurobiological mechanism of parochial altruism in male soccer fans playing the ultimatum game (UG) against ingroup and outgroup members (i.e., fans of the favorite or of a rivalling team) using functional magnetic resonance imaging. Our results suggest that individual differences in altruistic tendency influence the tendency for parochialism. While altruistic subjects rejected unfair offers independent of team membership, the more self-oriented 'pro-selfs' displayed a stronger ingroup bias and rejected outgroup offers more often. However, during a second session that introduced a team competition the altruists adapted to this parochial pattern. Behavioral strategy was further characterized by dissociable and context-dependent correlations between endogenous testosterone and neural responses in the anterior insula and the ventromedial prefrontal cortex. In sum, the present findings indicate that parochial altruism is shaped by individual differences in testosterone and behavioral strategy. In that way the results are in line with evolutionary theories of both individual and group selection.
AB - Parochial altruism refers to ingroup favoritism and outgroup hostility and has recently been linked to testosterone. Here, we investigated the neurobiological mechanism of parochial altruism in male soccer fans playing the ultimatum game (UG) against ingroup and outgroup members (i.e., fans of the favorite or of a rivalling team) using functional magnetic resonance imaging. Our results suggest that individual differences in altruistic tendency influence the tendency for parochialism. While altruistic subjects rejected unfair offers independent of team membership, the more self-oriented 'pro-selfs' displayed a stronger ingroup bias and rejected outgroup offers more often. However, during a second session that introduced a team competition the altruists adapted to this parochial pattern. Behavioral strategy was further characterized by dissociable and context-dependent correlations between endogenous testosterone and neural responses in the anterior insula and the ventromedial prefrontal cortex. In sum, the present findings indicate that parochial altruism is shaped by individual differences in testosterone and behavioral strategy. In that way the results are in line with evolutionary theories of both individual and group selection.
KW - Journal Article
U2 - 10.1016/j.neuroimage.2017.05.033
DO - 10.1016/j.neuroimage.2017.05.033
M3 - SCORING: Journal article
C2 - 28527791
VL - 156
SP - 265
EP - 276
JO - NEUROIMAGE
JF - NEUROIMAGE
SN - 1053-8119
ER -