中文摘要：

采用投注-反馈金钱赌博任务具体操作了在结果评价中被试可能采用的参照点，试图进一步探究大脑监控系统是如何对事件的好、坏以及好坏程度进行评定的。实验结果表明，不管是Feedback—related negativity（FRN）还是P300，和赌注相差较小的中间三种反馈诱发的波幅差异不显著，和赌注相差较大的两边两种反馈诱发的波幅和中间三种反馈差异显著。该结果说明，反馈相关ERP成分不是反映了对绝对信息的加工，而是反映了以赌注所在的区间为参照点的相对信息的加工。研究进一步从不同侧面表明FRN所代表的效价评价的参照点效应，同时首次从神经机制上揭示了P300所代表的数量加工的参照点效应。

英文摘要：

Some researches have investigated the relativity in outcome evaluation, but it is unclear about what the reference point is and its brain mechanism when the participants evaluate the relative value and relative magnitude. Enlightened by ＂Prospect theory＂ of reference point effect, we speculate that the feedback - related ERPs may represent reference point effect. In order to explore the hypothesis, this research distinguished the relative information based on a reference point and the absolute information based on zero by using Bet - feedback money gamble task. Event - related brain potentials （ERPs） were measured when 12 healthy college students did Bet-feedback money gamble task.We mainly analyzed ERPs elicited by the five feedbacks outcome following two bet conditions. The results showed a similar tendency in FRN and P300. The amplitude of the FRN elicited by the fast feedback was largest, and the amplitude of the FRN elicited by the fifth feedback was smallest, and the amplitudes of the FRN elicited by the second, third and fourth feedbacks were intermediate between that of the first and that of fifth feedback. The difference between the amplitude of the P300 elicited by the first feedback and that by the fifth feedback was not significant, while the amplitudes of the P300 elicited by the other three feedbacks did not show significant difference. The amplitudes of the P300 elicited by the fast feedback and by the fifth feedback are larger than those of the other three feedbacks. In summary, the results showed that the amplitudes of both FRN and P300 elicited by the second, third and fourth feedbacks, in which the financial gap between bet and feedback is small in relative magnitude, are not significantly different; the amplitudes elicited by the three feedbacks and those elicited by the first and fifth feedbacks, in which the financial gap between bet and feedback is large in relative magnitude, show significant difference. These results revealed that feedback - related ERPs reflect the processing