Studer Bettina, Scheibehenne Benjamin, Clark Luke
Behavioural and Clinical Neuroscience Institute (BCNI), Department of Psychology, University of Cambridge, Cambridge, UK.
Institute of Clinical Neuroscience and Medical Psychology, Medical Faculty, University of Dusseldorf, Dusseldorf, Germany.
Psychophysiology. 2016 Jun;53(6):940-50. doi: 10.1111/psyp.12627. Epub 2016 Feb 29.
The current study assessed peripheral responses during decision making under explicit risk, and tested whether intraindividual variability in choice behavior can be explained by fluctuations in peripheral arousal. Electrodermal activity (EDA) and heart rate (HR) were monitored in healthy volunteers (N = 68) during the Roulette Betting Task. In this task, participants were presented with risky gambles to bet on, with the chances of winning varying across trials. Hierarchical Bayesian analyses demonstrated that EDA and HR acceleration responses during the decision phase were sensitive to the chances of winning. Interindividual differences in this peripheral reactivity during risky decision making were related to trait sensitivity to punishment and trait sensitivity to reward. Moreover, trial-by-trial variation in EDA and HR acceleration responses predicted a small portion of intraindividual variability in betting choices. Our results show that psychophysiological responses are sensitive to explicit risk and can help explain intraindividual heterogeneity in choice behavior.
本研究评估了在明确风险下决策过程中的外周反应，并测试了选择行为的个体内变异性是否可以由外周唤醒的波动来解释。在轮盘赌投注任务中，对68名健康志愿者的皮肤电活动（EDA）和心率（HR）进行了监测。在这个任务中，向参与者展示有风险的赌注以供投注，每次试验的获胜机会各不相同。分层贝叶斯分析表明，决策阶段的EDA和HR加速反应对获胜机会敏感。在风险决策过程中，这种外周反应性的个体间差异与对惩罚的特质敏感性和对奖励的特质敏感性有关。此外，EDA和HR加速反应的逐次试验变化预测了投注选择中一小部分个体内变异性。我们的结果表明，心理生理反应对明确风险敏感，并且可以帮助解释选择行为中的个体内异质性。
