2.5. Statistical Analysis
REGRESSION
The effect of TMS/Sham stimulation on the MI brain response time (MIBRT) and functional connectivity strength between the ROIs was assessed with the Wilcoxon test by comparing We compared TOI-averaged source power distributions across conditions in a within-subjects design using a nonparametric permutation test combined with spatial clustering for family-wise error control [Furthermore, for each ROI at a specific frequency, we carried out the Wilcoxon tests in TMS/Sham conditions for MI1 and MI2 tasks because the Shapiro-Wilk test did not confirm the normality of the samples. These tests evaluated if there was a significant difference in the neural activity between MI1 and MI2 in TMS or Sham conditions. The critical alpha level was Holmes-corrected for multiple comparisons. Further, we have also used the Shapiro-Wilk criterion to test the normality of other samples.The significance of a linear regression between MIBRT and source power change in the ROI between MI2 and MI1 tasks was estimated with the Pearson correlation test implemented in the SciPy package.