Laboratory of Applied Brain and Cognitive Sciences, School of Business and Management, Shanghai International Studies University, People's Republic of China.
Laboratory of Applied Brain and Cognitive Sciences, School of Business and Management, Shanghai International Studies University, People's Republic of China; Postdoctoral Research Station, Shanghai International Studies University, People's Republic of China.
Neuroimage. 2019 Nov 15;202:116100. doi: 10.1016/j.neuroimage.2019.116100. Epub 2019 Aug 22.
When facing difficult decisions, people typically believe that "two heads are better than one". However, findings from previous studies are inconsistent regarding the advantages of decision-making in groups as compared to individual decision-making. We hypothesize that personality traits may modulate risk-taking behavior and brain activity changes during group decision-making. In this study, we used event-related potentials (ERP) with a well-validated balloon analogue risk task (BART) paradigm to examine the relationships between personality traits, decision-making behavior, and brain activity patterns when a cohort of male participants make decisions and take risks both in groups and in isolation. We found significantly increased risk-taking behavior and reduced P300 component during group decision-making as compared to individual decision-making only for participants with high Agreeableness, but not for those with low Agreeableness. Moreover, Agreeableness scores correlated with risk-taking behavior and P300 amplitude changes in group decisions. These findings suggest that Agreeableness personality modulates risk-taking behavior and brain activity when people make decisions in groups, which have implications for future group decision research and practice.
当面临困难的决策时，人们通常认为“三个臭皮匠，顶个诸葛亮”。然而，之前的研究结果对于群体决策相对于个体决策的优势并不一致。我们假设人格特质可能调节风险承担行为和群体决策过程中的大脑活动变化。在这项研究中，我们使用事件相关电位（ERP）和经过充分验证的气球模拟风险任务（BART）范式，研究了当一群男性参与者在群体和个体环境中做出决策并承担风险时，人格特质、决策行为和大脑活动模式之间的关系。我们发现，与个体决策相比，只有高宜人性的参与者在群体决策中表现出更高的风险承担行为和更低的 P300 成分，而低宜人性的参与者则没有。此外，宜人性得分与群体决策中的风险承担行为和 P300 幅度变化相关。这些发现表明，宜人性人格特质在人们进行群体决策时调节风险承担行为和大脑活动，这对未来的群体决策研究和实践具有启示意义。
