Socially responsible investment (SRI) is an emerging philosophy that integrates social and environmental impacts into investment considerations, and it has gradually developed into an important form of investment. Previous studies have shown that both financial and non-financial motivations account for SRI behaviors, but it is unclear whether the non-financial motive to adopt SRI derives from investors' altruism. This study uses neuroscientific techniques to explore the role of altruism in SRI decision-making. Given that existing evidence has supported the involvement of the right temporoparietal junction (rTPJ) in altruism and altruistic behaviors, we used transcranial direct current stimulation (tDCS) to temporarily modulate activity in the rTPJ and tested its effect on charitable donations and SRI behaviors. We found that anodal stimulation increased the subjects' donations, while cathodal stimulation decreased them, suggesting that tDCS changed the subjects' levels of altruism. More importantly, anodal stimulation enhanced the subjects' willingness to make SRIs, while cathodal stimulation did not have a significant impact. These findings indicate that altruism plays an important role in SRI decision-making. Furthermore, cathodal stimulation changed the subjects' perceived effectiveness of charitable donation but not that of socially responsible fund. This result may help explain the inconsistent effects of cathodal stimulation on charitable donations and SRI behaviors. The main contribution of our study lies in its pioneering application of tDCS to conduct research on SRI behaviors and provision of neuroscientific evidence regarding the role of altruism in SRI decision-making.

中文翻译：

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人们在进行社会责任投资时是否是无私的？来自 tDCS 研究的证据。

社会责任投资（SRI）是一种将社会和环境影响纳入投资考量的新兴理念，已逐渐发展成为一种重要的投资形式。先前的研究表明，财务和非财务动机均可解释社会责任投资行为，但尚不清楚采用社会责任投资的非财务动机是否源于投资者的利他主义。本研究利用神经科学技术来探讨利他主义在 SRI 决策中的作用。鉴于现有证据支持右颞顶联合区 (rTPJ) 参与利他主义和利他行为，我们使用经颅直流电刺激 (tDCS) 暂时调节 rTPJ 的活动，并测试其对慈善捐赠和 SRI 行为的影响。我们发现阳极刺激增加了受试者的捐赠，而阴极刺激则减少了捐赠，这表明经颅直流电刺激改变了受试者的利他主义水平。更重要的是，阳极刺激增强了受试者进行 SRI 的意愿，而阴极刺激则没有显着影响。这些发现表明利他主义在社会责任投资决策中发挥着重要作用。此外，阴极刺激改变了受试者对慈善捐赠的有效性的感知，但没有改变社会责任基金的有效性。这一结果可能有助于解释阴极刺激对慈善捐赠和 SRI 行为的不一致影响。我们研究的主要贡献在于它开创性地应用 tD​​CS 来研究 SRI 行为，并提供关于利他主义在 SRI 决策中的作用的神经科学证据。