Fig. 6.

Amygdala voxels in which altruists exhibited a different relationship between neural activation and social valuation in contrast to all controls. Note. A) Colormap corresponds to the difference in subjective social value-related activity between altruists and controls in a pre-registered a priori region of interest (BA; FDR-corrected q < 0.05). A smaller cluster of voxels in this region also survived multiple-comparison correction across the whole brain (FDR-corrected q < 0.05). B) Plots of mean activation magnitude in these regions as a function of subjective social valuation, group, and social distance. The average plot corresponds to the signal change by value aggregated across all social distances.