(A) Main experiment: activity in the right pSTS/TPJ at the time of decision significantly correlated with the percentage of group-members who had previously selected the item that was chosen by the participant on the current trial. The map is thresholded at p < 0.005 uncorrected for display purpose.
(B) Control experiment: no activity in the right pSTS/TPJ significantly correlated.
(C) Main vs. control experiments: activity in the right pSTS/TPJ significantly better correlated in the main experiment.
(D) Effect sizes of the group members’ prior choice in the independently identified right pSTS/TPJ ROI for the main and the control experiment (mean ± SEM across participants; n = 20). *p < 0.05, **p < 0.01, and n.s., non-significant as p > 0.05. pSTS, posterior superior temporal sulcus; TPJ, temporoparietal junction.