Reference Point Effect Of Self Experience And Vicarious Experience During Outcome Evaluation: An ERPs Study Using Repeated Trust Game

Trust not only played an important role in human interactions,but also contributed to establish good social relationships. After decision-making, individuals would evaluate the feed-back information quickly in the scene of the losses and gains coexist to adjust the subsequent behavior(Xu et al., 2011). And the feedback information about the result was not necessarily all come from the decision of himself/herself, may be some vicarious experience from others. In order to further discuss the above problems, this study through two experiments to study the evaluation mechanism of the decision-making in the trust game.Method: By ERPs technique, we conducted two experiments, one is pxperiment 1of self-executing condition, the other experiment 2 of watching condition. Exp1 and Exp 2 all had two factors: initial capital size(big/small) and fack-back type(win/loss).Result:(1)Under the self-executing condition, we found that loss produces higher FRN than win, and Lose or win money induced the same size FRN.(2) For the same feedback value of 20 and different initial capital, which induced the different size FRN, indicating that FRN processing was relative evaluation.(3)The first feedback type and the forth feedback type induced the same P300.(4) Under the watching condition, we also found that loss produced higher FRN than win money, and Lose or win induced the same size P300.Conclusion:FRN is sensitive to winning or losing, wihle P300 was sensitive to number.FRN evaluations about the results were based on certain standards both in he self-executing condition and the watching condition,so did the P300.