Oddball response to rank-based faces. (a) The SNR at 1.2 Hz and its harmonics (displayed from 0.5 Hz to 8 Hz) over the region of ROT reflect the sensitivity to faces with a specific rank (superior, medium, and inferior). Note that the fifth harmonic (6 Hz) is related to the base frequency. The topographical scalp maps on the right show the grand average of the sum of all significant oddball responses (up to 7.2 Hz, excluding 6 Hz) of baseline-corrected amplitude (μV) for each condition. The results confirmed that the oddball response occurred over the ROT in the superior and inferior conditions for both contexts. (b) The interaction effect of social rank and context on the rank-based response. (c) The effect of context on the rank-specific response. Comp, competitive context; Coop, cooperative context; Sup, superior condition; Med, medium condition; Inf, inferior condition. *P < .05, ***P < .001.