Fig. 4

Effects of tDCS stimulation on the number of completions for the two PPT subtests. A The results of the number of completions in the simple peg task. The left panel shows the results of 2 × 3 mixed-design analysis of variance for the left-handed simple peg task. The middle and right panels show the individual performance of the simple peg task across the three assessment sessions in the active and sham groups, respectively. The bold lines show the mean number of completions in each group performance. B The results of the number of completions in the assembly task. The left panel shows the results of 2 × 3 mixed-design analysis of variance for the left-handed assembly task. The middle and right panels show the individual performance of the assembly task across the three assessment sessions in the active and sham groups, respectively. The bold lines show the mean number of completions in each group performance. Error bars indicate the standard error of the mean. * = Corrected p < 0.05. PPT Purdue Pegboard Test, tDCS transcranial direct current stimulation