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Two experiments investigated the use of equal division as a social decision heuristic in a group resource-sharing task. We proposed that group members use equality as a decision heuristic to the extent that environmental cues making the rule salient are present and to the extent that competing cues are absent. In Study 1, subjects were provided with justification for being the first group member to withdraw resources from a common pool. The results showed that subjects for whom the justification was prototypical of resource-sharing situations were more likely to violate equality than were subjects with nonprototypical justifications. Study 2 investigated the extent to which arbitrary role assignments within a group affect choice behavior. As predicted, subjects assigned the role of "supervisor" made resource requests that exceeded an equal share, whereas subjects assigned the roles of either "leader" or "guide" made …