Adopting a 2∶1 mapping design, two types of conflicts, i.e., stimulus conflict (SC) and response conflict (RC), can be constructed in the color-word Flanker task. However, the neural mechanisms of occurrence of the two types of conflicts do not be understood well. To address this issue, the present study recorded the behavioral and electroencephalography (EEG) data when thirty-one healthy participants were performing the 2∶1 color-word Flanker task. Response time (RT) data showed significant SC and RC. Event-related potentials (ERPs) results manifested that 1) P3 peak amplitudes in the centro-parietal region might be related to SC, and 2) the peak latencies could make a well prediction for the RC in behavior. Thus, these results confirm that the neural mechanisms of occurrence of SC and RC are reflected in the centro-parietal P3 component.%在色-词Flanker任务中,研究者采用2∶1映射设计能构造两类冲突:刺激冲突和反应冲突.然而,这两类冲突所涉及的神经机制还不清楚.本研究采用2∶1映射设计,记录了31个健康成人被试完成色-词Flanker任务时的行为和脑电数据.反应时数据显示了明显的刺激冲突和反应冲突.事件相关电位结果表明,中顶部P3峰值与刺激冲突有关,峰潜伏期能预测反应冲突.所以,中顶部P3反映了刺激冲突和反应冲突的神经机制.
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