【摘要】 尽管证明人类具有主动遗忘能力的研究比较多,但是,探索情绪汉词主动遗忘效应以及电生理机制的实验却非常少。本研究采用事件相关电位技术、T/NT范式探索情绪汉词主动遗忘效应。实验一(行为研究)的结果显示,在中性和情绪汉词条件下,不回忆组的正确率都显著低于基线组,即得到了主动遗忘效应。同时,情绪汉词的主动遗忘效应量小于中性汉词。实验二(脑电研究)结果显示,在200-300ms,Fz,Cz,Pz电极点,回忆组的P2波幅高于不回忆组。在300-400ms,在Fz,Cz,Pz电极点,不回忆组的N2波幅高于回忆组。N2跟抑制过程高度相关,提示抑制是主动遗忘的一个主要原因。在400-500ms,在Pz电极点,回忆组的LPC波幅高于不回忆组。顶叶LPC跟记忆提取高度相关,提示主动遗忘阻止了回忆,这可能是主动遗忘效应发生的内在机制。更多还原

【Abstract】 In order to explore the motivated forgetting effect of emotional memory,the event-related potential technique,T/NT paradigm and negative Chinese words were used.The behavioral results of Experiment 1 showed that with the negative and neutral chinese words the correct rate of the NT group was significantly lower than the baseline level,that is,the experimental results obtained the motivated forgetting effect.The EEG results of Experiment 2 showed that 200-300ms:in Fz,Cz,Pz,the P2 amplitude of the T group was higher than that of the NT group.300-400ms:At the Fz,Cz,and Pz points,the N2 amplitude of the NT group is higher than that of the T,and N2 is highly correlated with the inhibition process,suggesting that inhibition is a major cause of motivated forgetting.400-500ms:At the Pz point,the P3 amplitude of the T group was higher than that of the NT group.TheP3 wave in the parietal lobe is highly correlated with memory recalling,suggesting that motivated forgetting prevents the recalling,a process that leads to the motivated forgetting effect.更多还原