For mass univariate analyses, a paired t-test was performed on each point of the time-cortical site matrix to reveal the time range that showed a significant difference between incongruent and neutral stimuli. Time points from 400 to 1000 ms after the stimulus onset were analyzed. For multiple comparisons, no correction was used in order to avoid influencing the judgment of whether the evident N450/LPC Stroop effect occurred before or after the behavioral response. For the ANOVA, time windows of 450 to 650 and 880 to 1000 ms were chosen for N450 and LPC based on the results of mass univariate analyses at each electrode. The mean amplitudes for N450 and LPC were obtained for each electrode in the six regions: frontal (F3, Fz, F4), frontocentral (FC3, FCz, FC4), central (C3, Cz, C4), centroparietal (CP3, CPz, CP4), parietal (P3, Pz, P4), and occipitoparietal (PO3, POz, PO4). Repeated-measures ANOVA with Condition (neutral, incongruent), Region (frontal, frontocentral, central, centroparietal, parietal, occipitoparietal), and Laterality (left, middle, right) as within-subject factors were performed on the mean amplitudes of N450 and LPC. Because the Stroop effect was the primary interest of this study, only significant main effects and interactions involving the factor Condition were reported.