Figure 3.

OFC response to a collective decision predicts subsequent response when making an individual choice. A, Enhanced BOLD response was observed in the right OFC when subjects learnt that the collective decision was inconsistent with their own vote, relative to when it was consistent (p < 0.05 FWE, anatomical SVC; displayed at p < 0.005, uncorrected). B, BOLD signal was extracted from this region for each specific trial and added as a parametric modulator predicting BOLD signal when an individual decision was to be made regarding the same pair at a later time. Parameter estimates were then averaged over the anatomically defined subregions of the right OFC as defined by the AAL atlas. For illustration purposes, the red frames in the trial design in A and B denotes the time of the trial when BOLD response was analyzed. C, A significant interaction emerged in the right superior OFC. Past OFC response to collective decision positively predicted subsequent OFC signal when making an individual selection between a pair of items for which subjects' initial vote was inconsistent with the collective decision in high conformers, a trend for a negative correlation emerged for low conformers, and no correlation emerged when the initial vote was consistent with group outcome. D, Across participants, the relationship between past and subsequent OFC response predicted behavioral change (i.e., choice reversals). Specifically, the greater the positive correlation between these signals on inconsistent trials, the more likely an individual was to reverse their choices to align with collective decisions that were initially inconsistent with their own. *p < 0.05, two-tailed t test; error bars indicate SEM.