The purpose of this study is to test a new hypothesis for the group identity effects in social
dilemmas, the effect that common group membership promotes cooperation. According to the …
… 北海道大学 小杉素子2・山岸俊男 General trust and judgments of trustworthiness Motoko
Kosugi and Toshio Yamagishi (Department of Behavioral Science, Faculty of Letters, Hokkaido …
The main purpose of this study was to examine how the existence of multiple Prisoner's
Dilemma relations among group members affects their choices in each PD relation. Twenty-eight …