Figure 2. Mean accuracy and reaction times (± SE) in the Flanker task in Experiment 2.

(a) Data from Experiment 2a (post-tDCS; right mastoid as the reference electrode site). (b) Data from Experiment 2b (post-tDCS; right supraorbital area as the reference electrode site). In both experiments stimulation was applied during an activity requiring low cognitive control. C  =  Congruent; I  =  Incongruent.