Endrass Tanja, Reuter Benedikt, Kathmann Norbert
Humboldt-Universität zu Berlin, Institut für Psychologie, Rudower Chaussee 18, 12489 Berlin, Germany.
Eur J Neurosci. 2007 Sep;26(6):1714-20. doi: 10.1111/j.1460-9568.2007.05785.x.
Event-related potential (ERP) studies identified the error-related negativity (Ne/ERN) and the error positivity (Pe) to be associated with performance errors. However, the functional significance of these components is not yet resolved. With the present study we intended to further investigate to what extent these components are related to error awareness. ERPs were recorded during an antisaccade task, and error awareness was obtained from accuracy ratings on each trial. In accordance with earlier findings, aware and unaware errors did not differ in Ne/ERN amplitude. Whereas the late Pe (400-600 ms) shows an increased parietal positivity for aware compared with unaware errors, the early Pe (200-300 ms) shows no dissociation between aware and unaware errors. These data lend further support to the view that the Ne/ERN and the (late) Pe reflect different processes in performance monitoring. In fact the present results provide a clear replication of [S. Nieuwenhuis et al. (2001) Psychophysiology, 38, 752-760], showing that the Pe is associated with error awareness and remedial action. Furthermore, it has been shown that this is only true for the late Pe, whereas the early Pe like the Ne/ERN is not modulated by error awareness.
事件相关电位（ERP）研究确定了错误相关负波（Ne/ERN）和错误相关正波（Pe）与执行错误有关。然而，这些成分的功能意义尚未得到解决。在本研究中，我们旨在进一步探究这些成分在多大程度上与错误意识相关。在一项反眼跳任务中记录ERP，并从每次试验的准确性评分中获得错误意识。与早期研究结果一致，有意识和无意识错误在Ne/ERN波幅上没有差异。虽然晚期Pe（400 - 600毫秒）在有意识错误时比无意识错误时顶叶正波增强，但早期Pe（200 - 300毫秒）在有意识和无意识错误之间没有差异。这些数据进一步支持了以下观点，即Ne/ERN和（晚期）Pe在绩效监测中反映了不同的过程。事实上，目前的结果明确重复了[S. Nieuwenhuis等人（2001年）《心理生理学》，38卷，752 - 760页]的研究，表明Pe与错误意识和补救行动有关。此外，研究表明这仅适用于晚期Pe，而早期Pe与Ne/ERN一样不受错误意识的调节。
