Analysis
The practice block of each session was not considered for analyses. Before RT analyses, erroneous trials in either Task 1 or Task 2 were removed. Further, all trials with RT1 < 200 ms and RT1 > 2000 ms and RT2 < 200 ms, and RT2 > 2500 ms were considered outliers and were not included in the analysis. This led to a removal of 0.6% of trials. A repeated measures ANOVA with the within-subject factors 2 (Stimulation condition: atDCS, sham tDCS) × 2 (Compatibility: compatible, incompatible) × 3 (SOA: 40, 130, 300 ms) was applied on mean RTs and PEs (see Tables RT1 (in ms) as a function of Stimulation condition (atDCS vs. sham tDCS), SOA (40 vs. 130 vs. 300 ms), Compatibility (compatible vs. incompatible).Standard errors of the mean are presented in parentheses.PE2 as a function of Stimulation condition (atDCS vs. sham tDCS), SOA (40 vs. 130 vs. 300 ms), Compatibility (compatible vs. incompatible).Standard errors of the mean are presented in parentheses.RT2 (in ms) as a function of Stimulation condition (atDCS vs. sham tDCS), SOA (40 vs. 130 vs. 300 ms), Compatibility (compatible vs. incompatible).Standard errors of the mean are presented in parentheses.The percentage error in Task 1 (PE1) for compatible and incompatible trials across SOA (in ms), for atDCS and sham tDCS. Error bars represent standard error of the mean. * 