When individuals work together on a project, they have to decide how much time they should invest in the task, and importantly, how much to invest relative to others. For example, say Tim and Tom are working together and Tim is more proficient at the task than Tom.Tim knows that if he works for 2 hr, Tom will have to work for 1 hr.However, Tom will have contributed only 1 hr, which will be 1 hr less than Tim will have contributed. Alternatively, Tim could work for 1.5 hr to finish the task and then Tom would have to work for 2.2 hr.Thus, Tim faces a decision between two options: In order to finish the task, (a) he can work for 2 hr and Tom can work for 1 hr, a joint welfare-maximizing option or (b) he can work for 1.5 hr and Tom can work for 2.2 hr, a selfish option. Option A maximizes the joint payoff by minimizing the joint effort but the option also results in more work for Tim and disadvantageous inequality regarding his individual effort in comparison with Tom's. Option B maximizes Tim's payoff by minimizing his individual effort. However, the inequality of effort is lower for Option B than for Option A. Would Tim be willing to use his proficiency advantage to maximize their joint welfare by choosing Option A, or would he favor self-interest by choosing Option B?The decision about how to allocate time in an interpersonal task represents an interpersonal decision because it has consequences for the decision maker and at least one other personThis is an open access article under the terms of the Creat ive Commo ns Attri butio n-NonCo mmerc ial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
AbstractWhile previous research on interpersonal decisions has focused on individual differences or situational determinants, in this paper, we looked at the interplay of situation and personality in decisions that are characterized by a conflict between self-interest and joint welfare. In an online experiment, 185 participants made decisions about the allocation of their own work time and the work time of another anonymous participant. Agency and uncertainty were manipulated between subjects, and social value orientation as well as dispositional envy were assessed. Participants chose between an option that maximized participants' joint welfare and an option that maximized personal payoffs. The results pointed to an interaction between personality and situational forces: Uncertainty moderated the effect of social value orientation, and agency moderated the effect of envy on decisions. Taken together, the results provide evidence that the effect of individual differences in interpersonal decisions depends on the situation. Implications for team work are discussed in situations where a group potentially benefits disproportionally more from an individual's relatively higher effort than the individual who exerts the effort.