Luo Jun, Chen Shu, Huang Daqiang, Ye Hang, Zheng Haoli
Neuro & Behavior EconLab, School of Economics, Center for Economic Behavior and Decision-Making, Zhejiang University of Finance and Economics Hangzhou, China.
School of Economics and Interdisciplinary Center for Social Sciences, Zhejiang University Hangzhou, China.
Front Psychol. 2017 Feb 21;8:224. doi: 10.3389/fpsyg.2017.00224. eCollection 2017.
Distributive justice concerns how individuals and societies distribute income in a just or equal manner. We aimed to test the roles of social preference in behavioral distributive justice. We thus provide evidence of a causal link between the neural and behavioral results through the application of bilateral transcranial direct current stimulation (tDCS) over the temporoparietal junction (TPJ) of our participants. The participants were found to make fairer distributions within the known position after receiving right anodal/left cathodal tDCS and receiving right cathodal/left anodal tDCS over the TPJ than the participants who received the sham stimulation. Simultaneously, we elicited the participants' advantage inequity aversion and found that the participants who received right anodal/left cathodal tDCS and who received right cathodal/left anodal tDCS over the TPJ were more averse to advantage inequity. Additionally, the participants' distributive proportions to the lowest income stratum within the known position were strongly related to their social preference of advantage inequity aversion. Therefore, the present study demonstrated that the modulation of the excitability of the TPJ using tDCS altered the distributive decisions of the participants within the known position, and this effect might be attributable to a change in the individuals' social preferences.
分配正义关注个人和社会如何以公正或平等的方式分配收入。我们旨在测试社会偏好在行为分配正义中的作用。因此，我们通过对参与者的颞顶联合区（TPJ）施加双侧经颅直流电刺激（tDCS），提供了神经学和行为学结果之间因果关系的证据。结果发现，与接受伪刺激的参与者相比，在TPJ接受右侧阳极/左侧阴极tDCS和右侧阴极/左侧阳极tDCS后，参与者在已知情境下做出了更公平的分配。同时，我们引发了参与者对优势不平等的厌恶，发现接受右侧阳极/左侧阴极tDCS和在TPJ接受右侧阴极/左侧阳极tDCS的参与者对优势不平等更为厌恶。此外，参与者在已知情境下对最低收入阶层的分配比例与他们对优势不平等厌恶的社会偏好密切相关。因此，本研究表明，使用tDCS调节TPJ的兴奋性改变了参与者在已知情境下的分配决策，这种效应可能归因于个体社会偏好的变化。
