showed a trendp = 0.055
Age was controlled as a covariate of no-interest in all analyses because the corresponding sex difference showed a trend to significance ( t (100) = 1.944, p = 0.055) and the P3/LPP magnitude is known to decrease with age [ 100 , 101 ], which was also seen in our study ( r = − 0.401, p < 0.001***; Fig. 1 b).