Fig. 3: Option positions affect the first AOI that participants sample on each trial.

a Heatmap of gaze position on the screen during the first 300 ms of each trial, across all participants and trials b Frequency of the first gaze being directed to four main screen locations, each dot represents the average across all trials for one participant. The error bars represent the average across participants and s.e.m. c Distribution of the first gaze being directed to each AOI. Each dot represents one participant. The error bars represent the average across participants and s.e.m. d Share of trials starting with fixation to each AOI in the four different option positions. The colored bars represent the histogram of first fixations to each AOI for each position, averaged across participants, and the error bars represent s.e.m. across participants. The black diamonds represent the average frequency across all options positions (Fig. 3c). The arrow points to a pattern in the Mutual Cooperation down left position, where the temptation payoff T of the opponent is frequently sampled first. All panels: N = 88 participants.