A Common Mechanism Underlying Food Choice and Social Decisions
Fig 2
Choices and reaction times from Task 1 (Dictator game).
A) The probability of the dictator choosing the selfish option as a function of his own payoff gain from the selfish option, relative to the fairer option, and B) as a function of the receiver’s payoff loss from the selfish option. C) The dictator’s RT, and D) individually de-meaned RT, as a function of his own payoff gain from the selfish option. Black circles indicate the aggregate subject data with bars representing s.e.m. Red dashed lines indicate the aDDM predictions with 95% confidence intervals. Overlap of these confidence intervals with the data’s standard error bars in every case indicates excellent model predictions. In the first row of the figure (and Figs 3 and 4) the two panels present the same data but using different x-axes to demonstrate that the data and model are sensitive to both dimensions of the decision problem.