Which of the following experimental manipulations has been shown to decrease conflict among groups?

Question

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Asking members of two groups to perform distinct roles and tasks that contribute to the overall good has been shown to decrease conflict among groups. This is because it encourages interdependence and cooperation among group members, as they must work together to achieve a common goal. Randomly dividing groups into two subgroups and asking each group to come up with a group name does not necessarily decrease conflict, as it is a relatively trivial task. Asking members of two groups to merge completely may actually increase conflict, as it can lead to competition for resources and power within the newly formed group. Asking members of two groups to think of themselves as individuals, rather than group members, also does not necessarily decrease conflict, as it may lead to a lack of social identity and a decrease in group cohesion.

Which of the Following Experimental Manipulations Has Been Shown to Decrease