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Hello, I have just discovered the critical threshold number as a randomise output and have read the posts about what it means, however I still have a few of questions. I will use my data as an example. I ran an analysis and got the message: "Critical Value for: *_tfce_corrp_tstat1 is: 202965" Previously, you have said that this is the value to use if I would like to threshold the image and that you would expect this value to be in the range of a *_tfce_corrp_tstat image. I am correct in summarizing your previous statements? What I am confused about is that I see only pvalues when I look at the *_tfce_corrp_tstat1. How could I view the image to see a range that would contain this number? Is a pvalue of .95 (reversed as in fslview) equivalent to the tfce threshold of 202965 for my data? Second, if I want to threshold the image instead of using fslmaths *_tfce_corrp_tstat1 -thr 0.95 should I use fslmaths *_tfce_corrp_tstat1 -thr 202965 ? Thank you for your help, Christa