Fig. 4 .

(A) Differences in rTPJ activity between conditions. Participants showed reduced rTPJ activity in response to friend than to stranger. These effects were more prominent in the taking condition. (B) Association between rTPJ activity and prediction error. Participants’ trial-by-trial rTPJ activity was significantly associated with their prediction error signal evoked when their friend took money from them. The more negative the PE participants experienced in response to their friend’s taking behavior, the greater rTPJ activity they showed. (C) Association between rTPJ activity and social judgment ratings. Participants’ trial-by-trial rTPJ activity significantly tracked ratings when their friend took money from them. The greater rTPJ activity participants showed in response to their friend’s taking behavior, the lower ratings they ended up giving to their friend in the given trial. ^**P < 0.001;^*95% CI did not contain 0.