To estimate the reliability of the N250, we correlated the amplitudes of the first and second half of the experiment. For the target face-elicited N250 this correlation was r = 0.748, yielding good reliability after Spearman-Brown correction (0.855). For high-distinctive non-target faces the correlation was r = 0.876 and for low-distinctive non-target faces it was r = 0.864, yielding excellent Spearman-Brown corrected reliabilities of 0.934 and 0.927, respectively.