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Normalized average TOL performance gain with anodal (black bars) and cathodal (gray bars) tDCS of the left dorsolateral prefrontal cortex (DLPFC). Normalized values were obtained setting the performance during each of the corresponding sham tDCS sessions to 100. Session-specific significant differences in reaction time and accuracy for planning performance of anodal DLPFC compared with cathodal DLPFC stimulation were found. Error bars indicate ± SEM.
