Kopp B, Rist F, Mattler U
Humboldt University, Berlin, Germany.
Psychophysiology. 1996 May;33(3):282-94. doi: 10.1111/j.1469-8986.1996.tb00425.x.
Event-related potentials were recorded in a flanker task using arrowheads pointing to the left or to the right as targets and as congruent or incongruent flanker stimuli using squares as neutral flanker stimuli. The onset of the flanker stimuli preceded that of the target stimuli by 100 ms. Lateralized readiness potentials showed response activation below execution threshold in correspondence to the information conveyed by the flanker stimuli. Exclusively, the incongruent flanker condition provoked a N2c, which evolved closely synchronized to the erroneous response. Graded response analyses separating incongruent trials with weak, medium, and strong incorrect response activation revealed that the N2c amplitude covaried with the magnitude of the erroneous response. The N2c in the incongruent compatibility condition of the flanker task thus corresponds to the avoidance of inappropriate responses, possibly reflecting the inhibition of automatically but erroneously primed responses. The results are compatible with studies of error correction, suggesting that efference monitoring is a constituent of executive control.
在一项侧翼任务中记录事件相关电位，使用指向左侧或右侧的箭头作为目标，并使用正方形作为中性侧翼刺激，将其作为一致或不一致的侧翼刺激。侧翼刺激的起始时间比目标刺激提前100毫秒。侧化准备电位显示，与侧翼刺激所传达的信息相对应，在执行阈值以下出现反应激活。仅不一致的侧翼条件会引发N2c，它与错误反应紧密同步发展。对不一致试验进行分级反应分析，将其分为弱、中、强错误反应激活，结果显示N2c振幅与错误反应的大小相关。因此，侧翼任务中不一致兼容性条件下的N2c对应于对不适当反应的避免，可能反映了对自动但错误引发反应的抑制。这些结果与错误校正研究结果一致，表明传出监测是执行控制的一个组成部分。
