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Nawata, K. & Yamaguchi, H. (2011).
The escalation of personal altercations into intergroup conflict: Initiating intergroup vicarious retribution in an ad hoc laboratory experiment group @iPDFj
   The Japanese Journal of Experimental Social Psychology
, 51, 52-63.
(In Japanese with English abstract)

yTitlez
The escalation of personal altercations into intergroup conflict: Initiating intergroup vicarious retribution in an ad hoc laboratory experiment group

yAbstractz
When an outgroup member engages in conflictive behavior toward an ingroup member, other ingroup members may resort to retaliation toward outgroup members. This phenomenon is called intergroup vicarious retribution. Using a laboratory experiment, this study examined whether this retribution occurs in an ad hoc group. We allotted the winner of a one-on-one match to impose a fine on the loser, in order to manipulate and measure aggression. In the intergroup condition, the participants were informed that an outgroup member had imposed a fine on an ingroup member during the previous game, while in the control group condition, participants were not informed about any group membership. The results demonstrated that the participants imposed a larger fine on the loser (an outgroup member who did not induce any fines during the previous game) in the intergroup condition than in the control condition for both Study 1 and 2. In Study 2, this fine was found to be predicted by retaliatory motivation, but the average retaliatory motivation was not high. We concluded that intergroup vicarious retribution can be initiated even in an ad hoc laboratory experiment group.

yKeywordz
Intergroup vicarious retribution, intergroup conflict, outgroup aggression, ad hoc group

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