The investigator first computed means and standard deviations (SD) of the demographic and outcome variables for descriptive purposes. Next, the investigator compared the two treatment conditions (active tDCS versus sham tDCS) on all baseline outcome measures to ensure baseline equivalence using t-tests. Results are presented as means and SD. Both the primary (seizure frequency) and exploratory (epileptic discharges) hypotheses were tested using repeated measures analysis of variance (ANOVA) followed by Least Significant Difference to help understand any significant effects found. To describe the clinically meaningfulness of any changes, the investigator computed the percent reduction of number of seizures and epileptic discharges in each condition from pre- to post-treatment and from pre-treatment to 4-week follow-up. For all analyses, p values of < 0.05 were considered statistically significant. Analyses were completed using STATA software, version 10.0 (StataCorp, College Station, TX).