Pailing Patricia E, Segalowitz Sidney J
Department of Psychology, University of Waterloo, Ont., Canada.
Brain Cogn. 2004 Nov;56(2):215-33. doi: 10.1016/j.bandc.2004.06.005.
A series of experiments were conducted to address the effect of uncertainty regarding performance for predicting the likelihood of a correct-response negativity (CRN) in addition to error-related negativity (ERN). In Study 1, 18 healthy young adults completed letter discrimination tasks during single and dual attention conditions designed to manipulate response certainty. In the second study, the same participants completed easy and difficult tone discrimination tasks designed to influence stimulus certainty. In the third study, task difficulty was manipulated to produce different error rates without altering certainty. Studies 1 and 2 indicated that error and correct responses are processed more similarly when uncertainty is present (i.e., ERN approximately CRN). Furthermore, uncertainty was associated with attenuation of the ERN and enhancement of the CRN, consistent with an error detection hypothesis. Study 3 indicated that task difficulty alone does not influence the ERN or likelihood of a CRN. These results offer support for the error detection account of the ERN and establish the role of uncertainty in predicting the CRN, as postulated by .
进行了一系列实验，以研究除错误相关负波（ERN）外，表现不确定性对预测正确反应负波（CRN）可能性的影响。在研究1中，18名健康的年轻成年人在旨在操纵反应确定性的单注意力和双注意力条件下完成字母辨别任务。在第二项研究中，相同的参与者完成了旨在影响刺激确定性的简单和困难音调辨别任务。在第三项研究中，操纵任务难度以产生不同的错误率，同时不改变确定性。研究1和2表明，当存在不确定性时（即ERN近似于CRN），错误反应和正确反应的处理方式更为相似。此外，不确定性与ERN的减弱和CRN的增强相关，这与错误检测假设一致。研究3表明，仅任务难度不会影响ERN或CRN的可能性。这些结果为ERN的错误检测理论提供了支持，并确立了不确定性在预测CRN中的作用，正如所假设的那样。
