奖赏预测误差对时间顺序记忆和来源记忆的影响  

The Effect of Reward Prediction Errors on Temporal Order and Source Memory

作　　者：张弘弛 成旋 毛伟宾[1] Zhang Hongchi;Cheng Xuan;Mao Weibin

机构地区：[1]山东师范大学心理学院,济南250358

出　　处：《复印报刊资料（心理学）》2023年第11期31-46,共16页

基　　金：山东省自然科学基金项目(ZR2021MC081);山东师范大学“工作记忆的认知及脑机制”科研创新团队资助。

摘　　要：先前研究表明,事件边界会增强边界处来源记忆、削弱跨边界的时间顺序记忆,但对于两者之间是否存在一种权衡关系,以及内在的、具有社会性意义的变化作为事件边界是如何影响记忆的,尚鲜有研究。本研究以奖赏预测误差(reward prediction errors,RPE)作为事件边界,通过两个行为实验和一个ERP实验,探讨RPE事件边界对时间顺序记忆和来源记忆的影响。结果发现,RPE事件边界增强了边界处信息的来源记忆,高RPE事件边界引发了记忆权衡效应;相对于事件内/非边界条件,跨事件/边界条件记忆的正确提取诱发出更大的N400波幅,时间顺序记忆的激活主要集中在头皮中前部,来源记忆的激活主要集中在头皮中后部。本研究表明,事件边界的切分强度是影响记忆权衡效应的重要因素,N400成分可能是反映事件边界对情景记忆的整合与切分的重要指标。The human brain automatically segments continuous experiences into discrete events to better re-member ongoing experiences in daily life.This automatic process is known as event segmentation.The time points between different events are called event boundariesthey indicate when one event ends,and another begins.Stud-ies have shown that the event boundaries may enhance the item-context source memory of information at the boundaries but impair temporal order memory in across-event information.Notably,previous studies mainly focused on the boundaries caused by changes in the external environment and rarely paid attention to the subjective bounda-ries caused by changes in an individuals internal psychological context.Moreover,Rouhani et al.(2020)first con-firmed that reward prediction errors(RPE)could be used as event boundaries to influence memory.Additionally,it has been demonstrated that the RPE event boundary reduces the temporal order memory in across-event information.However,the effects of the RPE event boundary on temporal order and source memory and whether the mnemonic trade-off effect exists are not clear.The neurophysiological mechanisms underlying the effects of event boundaries on memory require further examination.This study used behavioral and event-related potentials(ERP)technology in three experiments to explore the effect of RPE event boundaries on temporal order and source memory,respectively,based on behavioral and neurophysiological mechanisms.Experiment I used a neutral scene picture matching value as materials.The value of successive pictures fluctuates around an average value to form an event,and event boundaries denote when there is a significant shift in the value,which is the reward prediction error.The participants were required to complete two memory tests:A temporal order memory test and a source memory test.The source memory test was presented with a neutral scene picture,and participants were asked to choose a value that matched the learning stage from the two alternatives.We aimed to

关 键 词：奖赏预测误差 事件边界 时间顺序记忆 来源记忆 记忆权衡效应 

分 类 号：B842.3[哲学宗教—基础心理学]