a covariate in these regression analyses. All analyses initially used a voxel-wise threshold of p<.05 and a minimum extent of 10 contiguous voxels. We then used simulations in AlphaSim based on the five-ROI mask to compute minimum cluster sizes in order to adjust for Type I error in all analyses. The minimum extent size of continuous voxels required for a corrected p<.05 cutoff using the entire mask was 247 voxels.
