Fig. 2

Practice related changes in response inhibition and response execution. A SSRT, an index of response inhibition ability, is shown for the pre- and post- tDCS testing. A shorter SSRT indicates a better inhibition ability. SSRT decreased in post-tDCS sessions, indicating practice-related learning. B SSRT is shown for the pre- and post- tDCS testing for each tDCS condition (sham or anodal). The observed practice-related learning was not influenced by tDCS condition. C Response time in correct Go trials is shown for the pre- and post- tDCS testing. Response time increased in post-tDCS sessions, indicating practice-related slowing. D Response time in correct Go trials is shown for the pre- and post-tDCS testing for each tDCS condition (sham or anodal). The observed practice-related learning was not influenced by the tDCS condition. Error bars in all figures show the standard error of the mean. In B and D The p-value indicates the significance level for the interaction of StimulationType and Practice