Behavioral studies using the flanker 2-1 mapping task suggest that both stimulus and response conflicts contribute to flanker conflict effect. However, both are intertwined with distraction effect. Their underlying neural mechanisms remain unclear. We applied a perceptual flanker 2-1 mapping task to 24 healthy young adults, while the event-related potentials were recorded. The task included stimulus-incongruent (SI), response-incongruent (RI), congruent (CO) and neutral (NE) stimuli. Our reaction time data demonstrated conflict effect, distraction effect and their interaction. Furthermore, the conflict factor successively enhanced the frontal P2 (160–240 ms), the posterior N2pc (200–240 ms), the fronto-central and the right frontal N2b (240–420 ms), and the posterior N2c (320–420 ms). Only the frontal P2 was larger for RI than SI. The distraction factor increased the right N2pc and reduced the left parietal P3b (460–480 ms). Overall, our findings suggested that the flanker conflict involved an early attentional processing of task-relevant and distractive information, and a later processing of conflict evaluation and response inhibition.

中文翻译：

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侧卫范式包含具有独特神经机制的冲突和干扰因素：2-1映射任务中的ERP分析。

使用侧卫2-1映射任务进行的行为研究表明，刺激和反应冲突都有助于侧卫冲突。然而，两者交织在一起，分散注意力。它们的潜在神经机制仍不清楚。我们将知觉侧翼2-1映射任务应用于24位健康的年轻人，同时记录了与事件相关的电位。任务包括刺激不一致（SI），反应不一致（RI），一致（CO）和中性（NE）刺激。我们的反应时间数据显示了冲突效应，干扰效应及其相互作用。此外，冲突因素依次增强了额叶P2（160–240 ms），后N2pc（200–240 ms），额中央和右额N2b（240–420 ms）和后额N2c（320– 420毫秒）。对于RI，仅额叶P2大于SI。干扰因素增加了右N2pc并减少了左顶壁P3b（460–480 ms）。总体而言，我们的研究结果表明，侧翼冲突涉及对与任务相关和分散注意力的信息的早期注意处理，以及对冲突评估和响应抑制的后期处理。