启动影响随后再认的认知神经机制研究

This project aims to investigate the cognitive neural mechanism of how priming affects subsequent recognition memory by using two-character Chinese words and sounds as experiment materials, applying the ERP and fMRI experiment technique, and utilizing the repetition and conceptual masked priming paradigm. The project explores the cognitive neural mechanism of the effects of priming on subsequent recognition memory by examining the pattern of the effects of priming on subsequent recognition memory, the modulation effects of processing level and stimuli modality on the effects of priming on subsequent recognition memory. With the above mentioned experiment materials, experiment technology, and experiment paradigm, 3 studies (including 6 experiments) are designed to investigate: 1) the temporal course and related brain areas of how repetition and conceptual priming affects subsequent recognition memory; 2) the relationship between processing level and the effects of priming on subsequent recognition memory; 3) the relationship between stimuli modality and the effects of priming on subsequent recognition memory. We expect that we can reveal how priming affects subsequent recognition thorough affecting memory encoding activities by exploring the cognitive neural mechanism of the effects of priming on subsequent recognition memory, which can help to promote the new trend that investigating the relationship between implicit and explicit memory from the perspective that how they interact with each other.

本项目以汉语双字词和声音为实验材料，借助ERP和fMRI实验技术，采用重复掩蔽启动和概念掩蔽启动范式，从启动对随后再认的影响模式、加工水平以及刺激所属通道对启动对随后再认影响的调节作用三个方面，系统探讨启动对随后再认影响的认知神经机制。借助上述实验材料、实验技术和实验范式，本项目设计了3个研究（包含6个实验）来系统探讨：1）重复和概念启动对随后再认影响的时间进程及相关脑区；2）编码阶段加工水平与启动对随后再认影响的关系；3）刺激所属通道与启动对随后再认影响的关系。我们期待，通过对启动影响随后再认的认知神经机制的系统性研究，揭示启动如何通过影响记忆编码活动影响随后再认，从而促进从相互影响的角度重新认识内隐记忆和外显记忆之间的关系这一新的研究趋势的发展。

本项目采用汉语双字词、常见物体图形等为实验材料，采用重复掩蔽启动和概念掩蔽启动范式进行了一系列研究，系统地考察了启动影响随后再认的认知神经机制。本项目主要进行了以下工作：1）考察了重复和概念掩蔽启动相关的ERP成分。本项目研究发现，重复掩蔽启动和早期的P200以及N400相关，而概念掩蔽启动仅和晚期的N400相关；2）考察了重复和概念掩蔽启动影响测验阶段再认判断的认知神经机制。本项目研究发现，重复掩蔽启动影响基于熟悉性的再认判断，概念掩蔽启动影响基于回想的再认判断；重复掩蔽启动对再认判断的影响和早期的P200以及N400相关，而概念掩蔽启动对再认判断的影响仅和N400相关；3）考察了重复和概念启动影响随后再认的认知神经机制。本项目研究发现，重复掩蔽启动影响基于回想的随后再认，而概念掩蔽启动影响基于熟悉性的随后再认；重复启动对随后再认的影响主要是和早期的P200以及晚期的LPC相关，而概念启动对随后再认的影响主要和N400相关；4）本项目在这些研究基础上，提出启动影响随后再认的模型。重复启动影响基于回想的随后再认可能是因为非启动的醒目较启动项目更特异，而使得被试对这些项目进行了更多的认知加工进而促进了情景编码活动。概念启动影响基于熟悉性的随后再认可能是因为被试对非启动项目进行更多的语义和背景的整合加工。本项目的研究揭示了启动影响随后再认的认知神经机制，并为认识启动和再认之间的关系提供了新的视角和实验依据。

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