Figure 7. Neural arbitration directed to specific source of information.

(a) Activity in the left midbrain (substantia nigra (SN)) [−6,–18, −10] (top) and the right DLPFC [36, 46, 30] (bottom) during the prediction of card color increased more when participants arbitrated in favor of individually estimated card color probability as compared to the advisor’s suggestions (whole-brain FWE cluster-level corrected, p<0.05). (b) Activity in right (OFC [28, 26, -16] (top) and in right amygdala [18, -10, -16] (bottom) increased more when participants arbitrated in favor of the advisor’s suggestion than when they arbitrated in favor of the individually learned estimates of card probability (whole-brain FWE cluster-level corrected, p<0.05). The line plots reflect the average BOLD signal activity in the respective significantly activated cluster aligned to the onset of advice presentation relative to pre-advice baseline averaged across trials for one representative participant in midbrain and DLPFC (a) or OFC and amygdala (b). The shaded areas depict + / - standard error of this mean. In this figure, the scales reflect t-values.

Figure 7—figure supplement 1. Social versus non-social weighting (Equation 21).

Whole-brain activations by non-social weighting (one’s individual predictions about the card color outcome) compared to social weighting were detected in bilateral cerebellum, occipital cortices (lingual gyrus, superior occipital cortex), left anterior cingulate sulcus, right supramarginal gyrus, and left postcentral gyrus (blue). Conversely, activation by social weighting was significantly larger in the subgenual ACC (green) (whole-brain FWE cluster-level corrected, p<0.05).