在高低词频和间隔中通道类型对再认和重复启动的影响：ERP证据

发布时间：2018-12-17 06:26

【摘要】：再认的新/旧效应和重复启动经常被用来研究外显记忆和内隐记忆。近年来,尽管大量行为、脑电等研究均证实外显记忆和内隐记忆二者是相互分离的,最近一些学者的脑神经相关研究发现二者神经机制存在重叠。造成不同研究结果间产生差异的可能原因是已有研究控制的实验条件(如采用的研究范式、实验材料、时间间隔、呈现通式等)不一致,这在一定程度上降低了研究间的可比性。本文拟以再认的新/旧效应和重复启动两个方面来进行研究,探讨外显记忆和内隐记忆之间的关系。本文将进行四个研究,均采用事件相关电位(ERP)技术,采用相同的实验范式(修订的连续再认范式)、均以选取的为实验材料。研究一和研究三采用高频词汇为研究材料,研究二和研究四采用低频词汇为实验材料。研究一和研究二均为再认实验,被试的任务是在判断逐一呈现的词汇是否已学;研究三和研究四为重复启动实验,被试的任务是对词汇呈现通道作出判断。同为再认的研究一和研究二,均发现时间间隔、呈现通道、与通道类型的行为结果和反映再认神经机制的新/旧效应(包括反映熟悉加工的FN400和反映回忆加工的LPC)均具有明显调节作用。时间间隔和通道类型均对FN400和LPC具有明显调节作用,词频对FN400和LPC具有明显调节作用。同为重复启动的研究三和研究四,均发现时间间隔、呈现通道、与通道类型均与重复启动关联的行为结果和反映重复启动效应神经机制的相关成分(包括反映概念和重复加工的N400和意识提取的LPC)均具有明显调节作用。时间间隔和通道类型均对N400和LPC具有明显调节作用,词频对N400和LPC具有明显调节作用。本研究获得以下主要结论:时间间隔、通道类型和时间间隔对再认和重复启动的影响在神经机制方面是分离的。
[Abstract]:Recognition of new / old effects and repetitive priming are often used to study explicit and implicit memory. In recent years, although a large number of behavior, EEG and other studies have confirmed that explicit memory and implicit memory are separated from each other. The possible reason for the differences between the results of different studies is the inconsistency of the experimental conditions (such as the adopted research paradigm, experimental materials, time intervals, general expressions, etc.) that have been controlled by existing studies. This reduces the comparability of research to some extent. In this paper, the relationship between explicit memory and implicit memory is studied by using the new / old effects of recognition and repetitive priming. In this paper, four studies will be carried out, using the event-related potential (ERP) technique, using the same experimental paradigm (the revised continuous recognition paradigm), and using the selected data as the experimental materials. In the first and third studies, the high frequency vocabulary was used as the research material, and in the second and fourth studies, the low frequency vocabulary was used as the experimental material. The task of study 1 and study 2 is to judge whether the vocabulary presented one by one has been learned, and the task of study 3 and study 4 is to judge the lexical presentation channel. In both studies I and II, time intervals and channels were found. Both the behavioral results of channel type and the new / old effects reflecting the recognition neural mechanism (including FN400 which reflects familiar processing and LPC which reflects recall processing) have significant regulatory effects. Time interval and channel type can regulate FN400 and LPC obviously, and word frequency can regulate FN400 and LPC obviously. Studies 3 and 4, both of which are repetitive, both found time intervals and presented channels. The behavioral results associated with the channel type and the related components reflecting the neural mechanism of repetitive priming effects (including N400, which reflects concepts and repetitive processing, and LPC extracted by consciousness) have significant regulatory effects. The time interval and channel type were significantly regulated on N400 and LPC, and word frequency on N400 and LPC. The main conclusions of this study are as follows: the effects of time interval, channel type and time interval on recognition and repeat initiation are separated in neural mechanism.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：B842.3

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