| 讲座简介： | Social decisions involving tradeoffs between selfishness and pro-sociality are ubiquitous and important in our everyday life. Standard social-preference models assume that what drives these decisions is simply a relative weight on one’s own payoffs compared to those of the other(s). Recent work has argued that other factors such as predispositions or lagged consideration of certain attributes might also affect decision-making. Here, we investigate how predispositions and the temporal dynamics of the choice process influence social decisions, and how these factors explain individual differences in the effects of time pressure and delay. We use a series of mini-dictator games in which participants make binary decisions about how to allocate money between themselves and another participant with and without time constraints. Using (computer) mouse tracking and a time-varying drift diffusion model (tDDM), we find that selfish participants are delayed in processing others’ payoffs, while the opposite is true for pro-social participants. The relative onset times of the payoffs, whose tDDM and mouse-tracking estimates are highly correlated, are associated with participants’ pro-sociality in the time-free condition. Replicating Chen and Krajbich (2018), we find that time pressure amplifies participants’ general preferences, making them more pro-social or selfish, while time delay attenuated their general preferences, making them less extreme. Participants’ predispositions are the strongest predictors of behavioral change under time constraints, while relative onset times also contribute when the payoff weights are sufficiently large. These findings improve our understanding of pro-social behavior. |
