Research press release


Nature Communications

Psychology: Co-operation amidst uncertainty



今回、Oriel FeldmannHallの研究チームは、合計200人(女性106人、男性94人)のボランティアの被験者を対象として、一連の実験を実施した。最初の実験では、被験者が単独でギャンブルゲームを行い、リスクと不確実性に対する各人の耐性が評価された。次の実験では、被験者が他のプレーヤーらと協力すべきかどうかを決めるソーシャルゲームを行った。協力行動は協力する双方のプレーヤーの利益になる可能性があったが、協力者が裏切られて損をするリスクを伴った。以上の実験の結果から、多義性に対する耐性と向社会的行動の量は正の相関関係にあることが判明した。これに対して、リスクに対する耐性と社会的意思決定の間に関連は認められなかった。


People who are willing to take risks despite not knowing how likely it is that the risk will pay off, are also more likely to co-operate with and trust other people, suggests a study published this week in Nature Communications.

Psychologists and economists have previously identified two kinds of uncertainty: risk (in which the probability of each future outcome is known) and ambiguity (in which the odds of each outcome are not known). Individuals are known to differ in their tolerance to these two different kinds of uncertainty.

In this study, Oriel FeldmannHall and colleagues performed a series of experiments in which a total of 200 volunteers (106 female and 94 male participants) first completed a solo gambling game to assess their risk and uncertainty tolerance. They then played social games in which they had to decide whether to cooperate with other players. Co-operation potentially benefited both players but co-operators risked being betrayed and losing out. The results showed that ambiguity tolerance was positively correlated with the amount of prosocial behaviour. By contrast, there was no association between risk tolerance and social decision-making.

The authors suggest that we treat the decision to trust others as equivalent to a gamble where we do not know the odds, and that the personality trait of ambiguous uncertainty tolerance helps facilitate our social behaviour.

doi: 10.1038/s41467-018-04631-9

「Nature 関連誌注目のハイライト」は、ネイチャー広報部門が報道関係者向けに作成したリリースを翻訳したものです。より正確かつ詳細な情報が必要な場合には、必ず原著論文をご覧ください。

メールマガジンリストの「Nature 関連誌今週のハイライト」にチェックをいれていただきますと、毎週最新のNature 関連誌のハイライトを皆様にお届けいたします。