Weinberg Anna, Riesel Anja, Proudfit Greg Hajcak
Department of Psychology, Stony Brook University, Stony Brook, NY 11794-2500, USA.
Institut für Psychologie, Humboldt-Universität zu Berlin, Berlin, Germany.
Brain Cogn. 2014 Jun;87:134-9. doi: 10.1016/j.bandc.2014.03.015. Epub 2014 Apr 14.
The feedback negativity (FN) is an event-related potential component which is typically conceptualized as a negativity in response to losses that is absent in response to gains. However, there is also evidence that variation in the FN reflects the neural response to gains. The present study sought to explore these possibilities by manipulating the context in which loss and gain feedback was presented in a straightforward gambling task. In half the blocks, participants could win or lose money (Value condition), and in half the blocks, participants could not win or lose any money (No Value condition). The degree to which losses and gains were differentiated from one another (i.e., the ΔFN) was greater in the Value condition than in the No Value condition. Furthermore, though the responses to loss feedback and gain feedback were each enhanced in the Value condition relative to the No-Value condition, the effect of the monetary manipulation was substantially larger for the positivity to gains than the negativity to losses. This is consistent with the notion that the FN might reflect two independent processes, but that variation in the FN depends more upon the response to rewards than losses.
反馈负波（FN）是一种与事件相关的电位成分，通常被概念化为对损失的反应中的负波，而对收益的反应中则不存在。然而，也有证据表明FN的变化反映了对收益的神经反应。本研究试图通过在一个简单的赌博任务中操纵呈现损失和收益反馈的背景来探索这些可能性。在一半的组块中，参与者可能赢钱或输钱（价值条件），在另一半组块中，参与者不会赢钱或输钱（无价值条件）。价值条件下损失和收益之间的差异程度（即ΔFN）比无价值条件下更大。此外，尽管相对于无价值条件，价值条件下对损失反馈和收益反馈的反应均增强，但货币操纵对收益正向性的影响比对损失负向性的影响要大得多。这与以下观点一致，即FN可能反映两个独立的过程，但FN的变化更多地取决于对奖励的反应而非损失。
