Three different types of N-person social dilemma games were employed: the Prisoner's Dilemma (NPD), the Chicken Dilemma (NCD), and the Trust Dilemma (NTD). Subjects, who were classified a priori as either a cooperator (n = 58) or a defector (n = 68), participated in one of the social dilemma...

Two choice tasks known to produce framing effects in individual decisions were used to test group sensitivity to framing, relative to that of individuals, and to examine the effect of prior, individual consideration of a decision on group choice. Written post-decision reasons and pre-decision...