Male participants did not show reliable CSERPs in response to either stimulus (Fig. 1a). Accordingly, the P3 amplitude was generally larger in females than in males [Sex of Perceiver: F (1, 26) = 10.87, p = 0.003, f = 0.65, Power = 0.89]. This sex effect was evident at all three transversal electrode lines, but most pronounced at midline electrode positions [Sex of Perceiver by Transversal: F (2, 52) = 7.84, p = 0.001, f = 0.55, Power = 0.94].