Hi FSL Experts,
Hope you're well. In a recent manuscript, I used cluster thresholding in FEAT with a Z-threshold of 2.3 and a cluster p threshold of 0.05 in my PPI analyses and a reviewer wanted to know what the process used to determine the minimum cluster size was. My understanding is that in FSL, there are two options to do this (1) Gaussian Random Field (GRF) Theory and (2) permutation. I'm pretty sure I used GRF theory, but was wondering where I could find a more detailed explanation of how the minimum cluster size is determined using GRF theory in FSL. It seems like the minimum cluster size is determined based on the largest cluster in a given result using a particular Z-threshold. Does this mean that each group-level analysis would have a different minimum cluster size? Am I on the right track? Thanks so much!
Best,
Lauren
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