[The effects of information of the other's cooperative behavior on moral obligation].

Although it is expected that a social dilemma is solved by giving people feedback information about others' cooperative behavior, previous studies demonstrated that the information may promote cooperative behavior in some situations but may promote non-cooperative behavior in other situations. The study hypothesize that the feedback information of the others' cooperative behavior promote cooperative behavior for those who feel high obligation to cooperate in a social dilemma situation, such as a problem of bicycle parking behavior on road, but promote defective behavior for those who have low moral obligation. This is because the former people are hypothesized to attribute the cause of other's cooperative behavior to their social and intrinsic motivation, but the latter are hypothesized to attribute it to the egoistic motivation. The data from an experiment (n = 126) supported the hypotheses.