3.1.1. Voxel-level results
At the whole-brain voxel-level, block-designed analyses revealed no FDR-corrected significant correlation between electric fields and BOLD signal changes (p corrected > 0.05). Only a small proportion of voxels exhibited a small effect size (0.1 < |r| < 0.3) (9.74% of the voxels), a medium effect size (0.3 < |r| < 0.5) (1.36% of the voxels), and a mere 0.09% of voxels showed a large effect size (0.5 < |r| < 1). The total number of voxels analyzed was 96x114x96, and the Pearson Correlation Coefficient (|r|) was used as a measure of effect size (