Emotion and intergroup cooperation: How verbal expressions of guilt, shame, and pride influence behavior in a social dilemma

In interpersonal relations, it is known that expressing self-conscious emotions such as guilt and shame following a transgression is beneficial to reconciliation. In the current research, we examine whether this also applies to intergroup relations. Groups of three persons played an intergroup version of the "centipede game," in which one party can cooperate with or exploit another party. In Study 1, two groups played six rounds of this game in each of two phases. Between phases, groups rated how much guilt, shame, and pride they experienced in relation to how they had performed in Phase 1; these ratings were shared with the opposing group. Groups expressing high levels of guilt and shame were associated with greater cooperation in Phase 2, whereas groups expressing high levels of pride were associated with lower cooperation in Phase 2. In Study 2, all groups played against a "group" programmed to behave in an exploitative way in Phase 1. This group then expressed shame, pride, or no emotion (control) about its performance. Cooperation in Phase 2 was significantly higher in the shame than in the pride condition, and altruistic punishment was highest in the pride condition and lowest in the shame condition. Between them, these studies show that emotional expression plays an important role in repairing intergroup relationships and in particular that expressing shame about a transgression enhances intergroup cooperation following a transgression.