Dear FSL experts,
I would like to use "Randomise" to study the difference between two groups. I have COPE images as a final step of processing. these images are in the standard space. I merged all these COPEs using "fslmerge" then I built design matrix and design contrasts. Then I fed the COPEs-merged file to randomise as follows:
randomise -i COPEs -o output.nii -m mask.nii -d design.mat -t design.con -n 10000 -T -v 5
Kindly, I would like to inquire about:
1 Given that the COPE images contain positive and negative values. Is is correct to feed these images to randomise?
2. Is it correct that FEAT FSL choose parametric approach to study the COPE images instead of non parametric? If yes, I highly appreciate if you clarify why?
3. Is these any way in FSL to convert these COPE images to another type of images contain only positive values?
Looking forward to learn from your experience!
I appreciate any advice!
Cheers: John
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