Yi Wei, Mei Shuting, Li Qi, Liu Xun, Zheng Ya
Department of Psychology, Dalian Medical University, Dalian, China.
CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.
Biol Psychol. 2018 Oct;138:223-230. doi: 10.1016/j.biopsycho.2018.08.011. Epub 2018 Aug 15.
The current study examined how the experience of choice by which individuals exercise control modulates risk processing during the anticipatory phase as indexed by the stimulus-preceding negativity (SPN), and the consummatory phase as indexed by the feedback-related negativity (FRN) and feedback P3 (fb-P3). Twenty-four participants performed a simple gambling task during which they could win or lose either a small (a low-risk condition) or a large (a high-risk condition) amount of points by either choosing freely between two doors (a choice condition) or accepting a computer-selected door (a no-choice condition) while their EEG was recorded. As expected, participants rated the high-risk condition as more risky than the low-risk condition and reported higher feelings of control for the choice versus no-choice condition. Regardless of the involvement of choice, risk processing in this task was associated with greater fb-P3 amplitudes. However, during the choice condition, risk processing was associated with a more negative SPN during the anticipatory phase and a more positive FRN during the consummatory phase, which was absent (the SPN) or reduced (the FRN) in the no-choice condition. These findings suggest that the modulation of risk processing by choice occurs during both the anticipatory phase and the consummatory phase, which may be driven by motivation salience imposed by control.
当前研究考察了个体通过行使控制权进行选择的体验如何调节预期阶段的风险处理（以刺激前负波（SPN）为指标）以及消费阶段的风险处理（以反馈相关负波（FRN）和反馈P3（fb-P3）为指标）。24名参与者执行了一项简单的赌博任务，在此过程中，他们可以通过在两扇门之间自由选择（选择条件）或接受计算机选择的门（无选择条件）来赢取或输掉少量（低风险条件）或大量（高风险条件）的分数，同时记录他们的脑电图。正如预期的那样，参与者认为高风险条件比低风险条件风险更大，并报告说与无选择条件相比，选择条件下的控制感更强。无论是否涉及选择，该任务中的风险处理都与更大的fb-P3波幅相关。然而，在选择条件下，风险处理在预期阶段与更负的SPN相关，在消费阶段与更正的FRN相关，而在无选择条件下则不存在（SPN）或减弱（FRN）。这些发现表明，选择对风险处理的调节发生在预期阶段和消费阶段，这可能是由控制施加的动机显著性驱动的。
