Fig. 2: Depiction of uncertainty manipulations across experimental conditions.
From: Uncertainty about the impact of social decisions increases prosocial behaviour
a, Participants in the impact uncertainty condition learned that with equal chances, the receiver could be either poor, rich or somewhere in between. b, Participants in the certain-poor condition learned that the receiver was poor. c, Participants in the certain-rich condition learned that the receiver was rich. d, Participants in the outcome certainty condition played a standard binary dictator game. e, Participants in the outcome uncertainty condition played a hidden information game. A virtual coin-flip decided whether game 1 or game 2 would be played. In game 1, option A would result in 10 cents for the receiver, but in game 2 it would result in 85 cents. In game 1, option B would result in 85 cents for the receiver, but in game 2 it would result in 10 cents. Participants had the chance to reveal which game was played before making the decision.
