Figure 5.

Differences in average ERP waveforms by recipient identity. A, Heat map of significant p values showing stimulus-locked regression results for the main effects of Similar (left) and Dissimilar (right). Significant effects were visible for the Dissimilar recipient, but not the Similar recipient, at time windows from 350–400 ms after stimulus onset (green box). B, Scalp topography (left) and average waveforms (right) associated with choice recipient identity (cyan represents Own self; blue represents Similar other; orange represents Dissimilar other) 350–400 ms after stimulus onset. Inset, Source reconstruction from 350 to 400 ms after stimulus overlaid on a representative brain image localized this response to regions including the TPJ and STS. C, Heat map of significant p values showing response-locked regression results for the main effects of Similar (left) and Dissimilar (right). Significant effects were visible for the Similar recipient, but not Dissimilar recipient, ∼300 ms to 180 ms before the response (green box). Later effects in the Dissimilar condition coincide with motor activity related to initiation of the key press response. D, Scalp topography (left) and average waveforms (right) associated with choice recipient identity. Cyan represents Own self. Blue represents Similar other. Orange represents Dissimilar other. Inset, Source reconstruction from 300 to 180 ms before the response localized this differential response to regions including the IPS.