FSL folks,
I've obtained some seemingly significant clusters from GICA/dual regression/randomise. However, when I extract each subject's average cluster PEs from the appropriate IC from DR-stage 2 and plot them against the behavioral covariate of interest (the one included in my GLM in the first place) several of the scatter plots show no linear trends (ie the scatter is somewhat homogeneous or horizontal in distribution).
Several of the clusters are in regions I would have expected, a priori, so this is a little concerning.
My question: How should I interpret this? Does this suggest my results are spurious? Or is simply plotting them like this too simplistic a measure, considering I corrected some a few nuisance variables in my GLM?
Thanks for your advice,
Paul
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