Human Evolution and Cognition Group (EvoCog), University of the Balearic Islands, IFISC, Associated Unit to CSIC, Palma de Mallorca, Spain.
Int J Psychol. 2019 Oct;54(5):687-704. doi: 10.1002/ijop.12500. Epub 2018 Jun 21.
We studied 2 groups of workers from Oaxaca (Mexico) with different levels of income and education to investigate the role that the affective-based psychological mechanism of personal trust, as evolutionarily acquired, plays on group cooperation. We measured trust levels through some questionnaires and cooperative behaviour through an iterated prisoner's dilemma under different conditions and analysed trust networks of group members. While these groups did not differ in trust levels or cooperation among trustees, they did differ in terms of cooperation with other group members. Such differences are related to dissimilarities in the trust network topology-as a measure of group cohesion. These results suggest that some personal trust networks extend cooperation within a group beyond trustees in a way that complements the role of the reputation for indirect reciprocity.
我们研究了来自瓦哈卡（墨西哥）的两组工人，他们的收入和教育水平不同，旨在探讨个人信任这种基于情感的心理机制在群体合作中所起的作用。我们通过一些问卷来衡量信任水平，通过不同条件下的迭代囚徒困境来衡量合作行为，并分析了小组成员的信任网络。虽然这些群体在信任水平或受托人之间的合作方面没有差异，但在与其他小组成员的合作方面存在差异。这种差异与信任网络拓扑结构（作为群体凝聚力的一种衡量标准）的差异有关。这些结果表明，一些个人信任网络以一种补充间接互惠声誉作用的方式，将群体内的合作扩展到了受托人之外。
