Fig. 2.

(A–C) Ideology similarity drove the greatest brain-to-brain synchrony during an inflammatory political debate video (C). Statistical thresholds: voxel-wise P (FDR) < 0.05, cluster size ≥ 5 voxels (135 mm³). Slice numbers indicate MNI × coordinate. (D) Activity time courses in mOFC were synchronized between like-minded individuals. Representative pairs of subjects exhibiting neural synchrony in the mOFC are presented for the first 2 min of video 3, during which liberal Democrat Tim Kaine is speaking. BOLD is z-scored at the subject level; time courses are smoothed using a 6-s rolling window average to reveal trends at the intrinsic timescale of the BOLD response.