FIGURE 4.

Boxplots of the differences between baseline and tDCS session for overall accuracy, reaction time (RT), and RT variance, for the two stimulation conditions (sham and anodal). Each dot denotes an individual subject. The boxplot indicates the median (red line), the interquartile range (box), and the minimum and maximum (whiskers) after exclusion of outliers (open circles). For accuracy, positive scores indicate higher performance in the tDCS session. For RT, negative scores indicate faster performance in the tDCS session. For RT variance, negative scores indicate less variance in the tDCS session.