The Effects of Transcranial Direct Current Stimulation on the Cognitive Functions in Older Adults with Mild Cognitive Impairment: A Pilot Study

Figure 2

Sorting bugs. A: baseline; B: sham tDCS; C: tDCS; x-axis: observation points in days; y-axis: completion time in seconds. Scores are shown, along with black lines marking the average of each phase and with a black dotted line starting at the corresponding baseline marking 2-standard deviation (2 σ) when there is statistically significant difference (participant 3).