Hello,

Within my analysis, I have two different models that I would like to compare using a conjunction map. The first is an F map from 3dLME and the second is the result from 3dttest++. Currently, I am using clustsim and 3dClusterize to compute the F map in 3dLME at p < 0.001 a=0.05. For 3dttest++ I have used the following ETAC flag:
-ETAC_optNN=3:side=1,2:hpow=0,1,2:pthr=0.02,0.005,0.001:fpr=ALL:name=TEST \

My broader question is, is it appropriate to compare these two maps despite the different clustering methods?

I also have several questions about the ETAC output. It seems to be more liberal compared to clustsim/3dClusterize method. Is this due to the lower p threshold included in the ETAC command? In addition, the resulting map has two large clusters labeled as 4 and 6. I am not quite sure how to interpret these cluster numbers as they are not sequential. Do 4 and 6 have a specific meaning? I also ran 3dclust on this output to see if I could parse apart the two big clusters and there were 35 resulting clusters which seems large. Is this an appropriate practice?