I had run a TBSS analysis a couple months back using V1.1 and TFCE set to
the same parameters as those in the current version and the result was a
focal cluster of decreased FA. I re-ran the analysis with the latest TBSS
version (1.2), also with TFCE, and now have more dispersed results using the
same threshold (.95). Such differences are greater than I had expected. Is
the latest version of randomise more somehow sensitive to changes in FA?
If it helps, I have 75 subjects in my analysis forming three groups, but,
for this contrast, am comparing only 2 groups. Thus, the contrast reads 1 0 -1.
Thanks in advance for your help with this.