Hello,
I am running randomise for several tracts (divided into right and left). I use the same design matrix and contrast for all tracts but for the odd tracts, it results in 1 blank image. For example, the tfce_corrp_tstat1 is blank but the tfce_corrp_tstat2 is fine and is not a blank image and may even be significant. This could be the case for the left tract but the results for the right tract would be fine (not empty) or vice-versa. Was the blank image the result of an error? Is there something wrong if the unpermuted statistic image contains no positive values, and cannot be processed with TFCE? Can I trust the result of the second non-blank image ( e.g., tfce_corrp_tstat2)?
Thanks for yours help!
Kind regards,
Leonor
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