Topographical distribution of relative CSD SWA (0.8–4.6 Hz) and its correlation with prosocial preferences. A, Topographical distribution of relative CSD SWA (averaged over all participants). The dark blue to dark red colors indicate minimal (58%) to maximal (195%) CSD SWA. B, Statistical scalp distribution of r-coefficients between log-transformed relative CSD SWA and prosocial preferences. The blue areas indicate negative correlations; the red areas indicate positive correlations. The white dots indicate electrodes with significant correlations (p < 0.05). The black dots indicate the position of the 59 electrodes.