It sounds like they are referring to the cluster forming (aka primary) threshold, which used to be a default of 0.01 in previous FSL releases. Then the clusters are typically evaluated for significance using 0.05, FWE corrected. Check the Feat post-stats section of the wiki for more information.
Michael
Dear collective wisdom,
I was given the following request for an imaging paper and I need your advice:
"-For your cluster-based correction for multiple comparisons, an uncorrected P value of .001 is now recommended based on Eklund et al.'s work."
In our analysis, we used a fairly standard threshold of .05 FWE corrected. Is using an uncorrected threshold really advisable now? I've read the Eklund paper but I still don't understand how ignoring the multiple comparisons issue is ok?? Or am I missing something?
Thanks in advance.
