Influence of an individual’s own gains and losses on the evaluation of friends’ gambling results: Evidence from ERPs

on the evaluation of friends’ gains and losses would differ under different modes of self-construction. The results indicated that in the interdependent self-construction initiation group, the electrophysiological response mode that results from watching friends’ gambling was consistent with the result obtained in Experiment 1. However, after initiation of the independent self-construction of the subjects, the evaluation mode of the gambling results of a friend differed from that of the interdependent self-construction initiation group. In terms of the FRN index, regardless of one’s own gains and losses, the differences in FRN for friends’ gains and losses were no longer significant. In terms of the P300 index, the P300 discrepancy resulting from watching the gains and losses of a friend after suffering own losses was not significant. However, after having gained benefits, a higher P300 amplitude was induced by watching friends losing money in gambling than when watching them gain money. In summary, this study shows that: (1) the evaluation model for one’s friends’ gains and losses differs depending on the own experienced gains and losses. Under favorable conditions, an individual is more inclined to show indifference to his friends’ gains and losses, which may be because the individual employs stronger egocentric tendency in such a case. (2) The independent self-construction initiation group shows more indifference and competition when observing the gains and losses of a friend than in case of the interdependent self-construction group.