Expectancy effects in feedback processing are explained primarily by time-frequency delta not theta.
Expectancy effects in feedback processing are explained primarily by time-frequency delta not theta.
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DOI：
10.1016/j.biopsycho.2017.08.054
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发表时间：
2017-10
影响因子：
2.6
通讯作者：
Bernat EM
中科院分区：
文献类型：
--
作者：
Watts ATM;Bachman MD;Bernat EM
结果效价和期望在反馈加工中的作用已被研究为调节事件相关电位(ERP)测量的重要因素，包括反馈负性(FN)和P300，但结果一直不一致。我们小组最近的研究表明，利用时频分析，FN和P300的潜在过程可以更好地表示为theta(3-7 Hz)和Delta(0-3 Hz)范围内的可分离过程。本研究评估了在赌博反馈任务范式中，时间域Fn和P300以及时间-频率theta和Delta对结果效价和预期的调节作用。结果表明，FN对价敏感，但不受预期的影响，价效应是由损失敏感的theta和增益敏感的Delta驱动的。或者，P300对结果的预期很敏感，但只对GAIN试验敏感，这些预期差异可以用时间-频率增量而不是theta来解释。这些结果增加了越来越多的研究表明，时频测量反映了时间域成分下的可分离过程，其中theta对主要任务特征更敏感，对次要任务特征不那么敏感，而Delta对主要和更复杂的次要任务特征更敏感。
The roles of outcome valence and expectancy in feedback processing have been investigated as important factors modulating event-related potential (ERP) measures including the feedback negativity (FN) and P300, but results have been inconsistent. Recent work from our group has shown that processes underlying the FN and P300 are better represented as separable processes in the theta (3–7 Hz) and delta (0–3 Hz) ranges using time-frequency analysis. The current study evaluated the modulation of time-domain FN and P300 and time-frequency theta and delta to outcome valence and expectancy in a gambling feedback task paradigm. Results revealed that the FN was sensitive to valence but not expectancy, and that valence effects were driven by loss-sensitive theta and gain-sensitive delta. Alternatively, the P300 was sensitive to the expectedness of outcomes but only for gain trials, and these expectancy differences were explained by time-frequency delta not theta. These results add to a growing body of research showing that time-frequency measures reflect separable processes underlying time-domain components, where theta is more sensitive to primary task features and less sensitive to secondary features while delta is sensitive to primary and more complex, secondary task features.
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