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成功的前瞻记忆编码与提取的神经机制研究

, PP. 332-339

Keywords: 相继记忆效应,前瞻记忆,ERPP150LPC

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Abstract:

前瞻记忆是指对将来行为和事件的记忆,而相继记忆效应(Dm效应)是指根据记忆提取阶段的成绩,分析与之对应的编码阶段记住的项目和忘记的项目之间的神经活动的差异.本研究采用任务转化范式,借助ERP仪器,使用汉字材料,探讨了前瞻记忆的Dm效应.研究发现,100~200ms(P150),250~280ms(fbN2),400~700ms(LPC)随后前瞻记忆击中的ERPs比随后前瞻记忆忘记的ERPs更正.其中,早期的相继记忆效应(P150更正)可能反映了前瞻记忆将来意向的加工或者准备注意的加工;而后两个时段与以往的研究结果一致,fbN2可能与汉语材料的加工有关,LPC则反映了记忆的精确编码.总之,本研究从ERP的角度提供了前瞻记忆编码既与以往情景记忆编码有相同之处(LPC更正),又存在一些差异(P150更正)的证据,但这种差异需要进一步的研究来论证.

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