Figure 1.

Sample stimuli and trial timeline of the three decision tasks. (A) In the Value task, participants decided whether they preferred the lottery in (A,B) based on the magnitude of money and percentage probability of obtaining the money depicted. (B) In the Mathematical task, participants multiplied the magnitude of points and percentages and selected the bigger product of (A,B). (C) In the Emotion task, participants chose the person in (A,B) whom they felt might share more money with them.