Hello,
We are running randomise on VBM data and want to make sure we are properly viewing the results: When we open the unthresholded zstat image and manually provide a minimum height threshold of z = 2.3, we see a fair number of clusters. Our question arises from the observation that the clusters that appear in the tfce corrected image thresholded at min of p = 0 and max of p = .05 overlap with those in the uncorrected z images. However, the website directions indicate that we should be viewing the tfce images at a 1-p threshold of .95 - 1. We have started viewing the images with a 0-.05 threshold because we noted that the values in the clusters appeared to be p values (not 1-p values as indicated on the website). Can anyone confirm whether it is okay to threshold the tfce output image in this way?
Thanks in advance for any responses!
Chelsea Stillman, Ph.D.
NIH/NIMH T32 Postdoctoral Fellow
Department of Psychiatry
University of Pittsburgh Medical School
Commercial Translation Architect, sciVelo
