Zheng Yijie, Cheng Xuemei, Xu Jialin, Zheng Li, Li Lin, Yang Guang, Guo Xiuyan
Shanghai Key Laboratory of Magnetic Resonance, East China Normal UniversityShanghai, China.
Department of Physics, East China Normal UniversityShanghai, China.
Front Psychol. 2017 May 29;8:847. doi: 10.3389/fpsyg.2017.00847. eCollection 2017.
Economic status played an important role in the modulation of economic decision making. The present fMRI study aimed at investigating how economic status modulated behavioral and neural responses to unfairness in a modified Ultimatum Game (UG). During scanning, participants played as responders in the UG, and they were informed of the economic status of proposers before receiving offers. At the behavioral level, higher rejection rates and lower fairness ratings were revealed when proposers were in high economic status than in low economic status. Besides, the most time-consuming decisions tended to occur at lower unfairness level when the proposers were in high (relative to low) economic status. At the neural level, stronger activation of left thalamus was revealed when fair offers were proposed by proposers in high rather than in low economic status. Greater activation of right medial prefrontal cortex was revealed during acceptance to unfair offers in high economic status condition rather than in low economic status condition. Taken together, these findings shed light on the significance of proposers' economic status in responders' social decision making in UG.
经济状况在经济决策的调节中起着重要作用。目前的功能磁共振成像（fMRI）研究旨在调查经济状况如何在改良的最后通牒博弈（UG）中调节对不公平的行为和神经反应。在扫描过程中，参与者在UG中扮演回应者的角色，并且在收到提议之前被告知提议者的经济状况。在行为层面，当提议者处于高经济状况时，拒绝率更高，公平评级更低，而当提议者处于低经济状况时则相反。此外，当提议者处于高（相对于低）经济状况时，最耗时的决策往往发生在较低的不公平水平上。在神经层面，当处于高经济状况而非低经济状况的提议者提出公平提议时，左侧丘脑的激活更强。在接受高经济状况条件下而非低经济状况条件下的不公平提议时，右侧内侧前额叶皮层的激活更强。综上所述，这些发现揭示了提议者的经济状况在UG中回应者社会决策中的重要性。
