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Mean accuracy (+1 SE of the mean, group n = 20) in the addition (PASAT) and subtraction (PASST) tasks, before and after cerebellar tDCS. The number of correct answers that participants obtained on the subtraction task, but not the addition task, was significantly greater after cathodal, than after anodal or sham stimulation. Asterisks indicate significant differences (P < 0.05) as revealed with post hoc t-tests.
