Repeated interaction in integroup conflict was studied in the context of two team games: the intergroup public goods (IPG) game and the intergroup prisoner's dilemma (IPD) game. The results reveal (a) a main effect for game type; subjects were twice as likely to contribute toward their group...

Despite the common reliance on numerical probability estimates in decision research and decision analysis, there is considerable interest in the use of verbal probability expressions to communicate opinion. A method is proposed for obtaining and quantitatively evaluating verbal judgments in...