Department of Neurology, Universität zu Lübeck, Germany.
Department of Neurology, Universität zu Lübeck, Germany; Institute of Psychology II, Universität zu Lübeck, Germany.
Cortex. 2019 Oct;119:401-416. doi: 10.1016/j.cortex.2019.08.002. Epub 2019 Aug 19.
Dual-system accounts posit that instrumental behavior is controlled by both a goal-directed and a habitual system. In this study, we aimed to identify the electrophysiological components associated with goal-directed versus habitual performance using an outcome devaluation procedure. Datasets from 35 healthy participants were analyzed. Behaviorally, in line with previous research, participants displayed sensitivity to outcome devaluation, a hallmark of goal-directed control. Electrophysiologically, decreased N2 and increased error-related negativity (ERN) amplitudes were associated with slips of action in conditions that could potentially engage both the goal-directed and habitual systems. These amplitude differences were more pronounced in participants that displayed more sensitivity to devaluation. Furthermore, we show how specific neurophysiological learning signals, namely ERN and feedback-locked P3, could predict subsequent sensitivity to devaluation. Our findings indicate that the N2 and ERN components can be used as indices of goal-directed versus habitual control, and emphasize the importance of the ERN as an electrophysiological trait in the context of goal-directed behavior.
双系统理论认为，工具性行为受到目标导向系统和习惯系统的共同控制。在本研究中，我们旨在使用结果贬值程序来确定与目标导向与习惯表现相关的电生理成分。对 35 名健康参与者的数据集进行了分析。在行为上，与先前的研究一致，参与者表现出对结果贬值的敏感性，这是目标导向控制的标志。在可能同时涉及目标导向和习惯系统的情况下，电生理上，N2 降低和错误相关负波（ERN）振幅增加与动作失误有关。在对贬值更敏感的参与者中，这些幅度差异更为明显。此外，我们还展示了特定的神经生理学习信号，即 ERN 和反馈锁定 P3，如何可以预测随后对贬值的敏感性。我们的研究结果表明，N2 和 ERN 成分可作为目标导向与习惯控制的指标，并强调 ERN 在目标导向行为背景下作为电生理特征的重要性。
