Dear Amar,
> what exactly does the 1st column (set-level) signify? I have done a
> number of analyses and received a set-level of 0.998 for all of them.
It is the probability (i.e. P value) of obtaining the observed number
of clusters, or more, above the specified height and volume
thresholds. It is an inference about the SET of clusters that
consitute the activation pattern.
> In addition, I was wondering whether there is a certain cluster
> voxel-size that is used as a cut-off for determining which clusters
> show significance.
Yes there is and it is predicated on Gaussian field theory.
I would read:
Friston KJ Holmes A Poline J-B Price CJ Frith CD. Detecting
activations in PET and fMRI: levels of inference and power.
NeuroImage, 1996;4:223-235.
With best wishes - Karl
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