黄宇霞 罗跃嘉[1,2].负性情绪刺激的反应启动效应事件相关电位的实验研究[J].中国康复医学杂志,2005,20(9):648~651 |
负性情绪刺激的反应启动效应事件相关电位的实验研究 点此下载全文 |
黄宇霞 罗跃嘉[1 2] |
[1]北京师范大学认知神经科学与学习国家重点实验室,北京100875 [2]中科院心理研究所心理健康重点实验室、北京朝阳区大屯路10号,100101 |
基金项目:国家自然科学基金(30325026),中科院重要方向项目(KSCX2-SW-221) |
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摘要: |
目的:许多研究观察到,有机体对负性情绪刺激的反应比对中性或正性刺激快,本研究应用事件相关电位中的单侧化准备电位将反应时划分为刺激加工阶段和反应准备阶段,从而得以直接观察负性刺激的反应启动效应。方法:本研究选取国际情感图片系统的正、中、负性图片作为剌激材料,以正常大学生为被试,令其按键表示对图片情绪属性的判断,同时记录脑电。结果:正、负性情绪刺激引起的刺激锁定单侧化准备电位的潜伏期比中性条件下的潜伏期缩短,观察反应锁定单侧化准备电位的潜伏期可见,负性刺激引起的潜伏期显著短于中性和正性条件。结论:对情绪性刺激的心理加工评价过程较短,观察反应锁定单侧化准备电位的潜伏期可见,负性剌激引起的潜伏期显著短于中性和正性条件,表明负性刺激具有反应启动效应. |
关键词:情绪 反应启动效应 事件相关电位 单侧化准备电位 |
The reaction priming effect of emotionally negative stimuli: an ERP study Download Fulltext |
HUANG Yuxia LUO Yuejia |
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Objective: There is considerable evidence that organisms react more quickly to emotionally negative stimuli than to neutral or/and positive stimuli. Lateralized readiness potential(LRP) can divide reaction time into a psychological processing stage(stimulus-locked interval, S-LRP onset latency) and a movement readiness stage (response-locked interval, R-LRP onset latency). Utilizing LRP, we can observe the reaction priming effect of negative stimuli directly.Method:The experimental stimuli were from the International Affective Picture System. Eighteen undergraduates participated in this study as paid volunteers. They were told to observe the emotional pictures carefully and press the corresponding buttons as soon as possible to show their judgment of the emotional properties of the pictures.Result:The S-LRP onset latencies of positive and negative stimuli were shorter than that of neutral stimuli. The R-LRP onset latency of negative stimuli was significantly shorter than that of positive and neutral stimuli. Conclusion:The psychological assessment period of emotional events is relatively shorter than that of neutral events. The reaction priming effect of emotionally negative stimuli is observed in this study. |
Keywords:emotion reaction priming effect event-related potential lateralized readiness potential |
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