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. 2018 Feb 2;12:23. doi: 10.3389/fnhum.2018.00023

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Copyright © 2018 Wu, Fan, Du, Yang, Liu, Yen, Chen and Hsung.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Experimental design. (A) Different types of partners (decision marker 2, DM2). For each trial, participants (Decision Maker 1, DM1) could play the trust game with one of the three different types of partners (DM2). A DM2 could be a face covered by a blue patch (MA-DM2, representing a DM2 who voted for Ma in the 2012 presidential election of Taiwan), a face covered by a green patch (Tsai-DM2, representing a DM2 who voted for Tsai in the 2012 presidential election of Taiwan), or a computer (representing a neutral DM2). Note that the face stimulus was equally likely to be a male or a female face. (B) A typical trial sequence of the trust game. Each trial started with a 4-s decision phase (an image of one type of DM2) and a 2-s outcome phase in which we presented the gain of that trial and the response from the corresponding DM2 had participants chosen to trust.