Fachbereich Psychologie, Universität Konstanz, Fach D29, 78457, Constance, Germany.
Exp Brain Res. 2010 May;202(3):571-81. doi: 10.1007/s00221-010-2160-3. Epub 2010 Jan 22.
To study the effect of response-set size on action monitoring processes, the error-related negativity (Ne/ERN), the correct-related negativity (Nc/CRN), and behavioral indicators of action monitoring were compared across three groups of participants performing a two-choice, a four-choice, or an eight-choice version of the flanker task. After controlling for differential contribution of stimulus-related activity to response-locked averages resulting from large differences in response times across conditions, response-set size had strong effects on Ne/ERN and Nc/CRN. With increasing response-set size, the Ne/ERN amplitude decreased, but the Nc/CRN amplitude increased. Moreover, post-error behavioral adjustments were impaired with an increasing response-set size. These results suggest that action monitoring severely suffers when response-set size is increased. Implications of these findings for present theories of Ne/ERN and Nc/CRN are discussed.
为了研究反应集大小对动作监控过程的影响，我们比较了三组参与者在执行两种选择、四种选择或八种选择的侧翼任务时，错误相关负波（Ne/ERN）、正确相关负波（Nc/CRN）和动作监控的行为指标。在控制了由于条件之间反应时间的巨大差异而导致的刺激相关活动对反应锁定平均值的不同贡献之后，反应集大小对 Ne/ERN 和 Nc/CRN 有很强的影响。随着反应集大小的增加，Ne/ERN 幅度减小，但 Nc/CRN 幅度增加。此外，随着反应集大小的增加，错误后行为调整受损。这些结果表明，当反应集大小增加时，动作监控会严重受损。这些发现对 Ne/ERN 和 Nc/CRN 现有理论的意义进行了讨论。
