Fig. 9.

Comparisons between the SPM Gaussian random field, MRM permutation, and SwE non-parametric bootstrap approaches to FWE correction. The numbers above the images indicate the number of voxels surviving thresholding in each image. The permutation and bootstrap distributions are displayed with the 5% thresholds indicated. The original maximum reference test statistic has been cropped to make the histograms more readable. For comparison, the 5% F threshold given by SPM12 was 28.40. Total time to complete the non-parametric approaches (in minutes) were MRM = 12.62, SwE = 213.88.