Studying group decision-making is challenging for multiple reasons. An important logistic difficulty is studying a sufficiently large number of groups, each with multiple participants. Assembling groups online could make this process easier and also provide access to group members more...

In bargaining, buyers aim to spend as little money as they can on the items they seek to purchase. Compared to promotion-oriented people, prevention-oriented people seek to avoid losses rather than to secure gains. Employing different negotiation scenarios, three lab experiments tested the...

Any solution to rising levels of CO2 depends on human behavior. One common approach to changing human behavior is rewarding desired behavior. Because financial incentives often have side effects that diminish efficacy, we predict that social rewards are more effective, because they invoke...

Interventions to increase cooperation in social dilemmas depend on understanding decision makers' motivations for cooperation or defection. We examined these in five real-world social dilemmas: situations where private interests are at odds with collective ones. An online survey (N = 929) asked...

In two studies, time preferences for financial gains and losses at delays of up to 50 years were elicited using three different methods: matching, fixed-sequence choice titration, and a dynamic ``staircase'' choice method. Matching was found to create fewer demand characteristics and to produce...

Employing a die-under-cup paradigm, we study the extent to which people lie when it is transparently clear they cannot be caught. We asked participants to report the outcome of a private die roll and gain money according to their reports. Results suggest that the degree of lying depends on the...

Past research has shown that people consistently believe that others are more easily manipulated by external influences than they themselves are---a phenomenon called the ``third-person effect'' (Davison, 1983). The present research investigates whether support for public policies aimed at...