Dear Russ
> Hi, I'm trying to understand the output of the SPM results procedure using
> the corrected extent threshold. when I run the SPM{Z} function to get a
> listing of maxima, I tell it to use a height threshold of 0.01 and a
> corrected extent threshold of 0.05. My impression was that this corrected
> extent threshold corresponded to the cluster-level (conjoint height and
> extent) p-value.
No, SPM is keeping clusters that survive your threshold on the basis of
the cluster size only (not on the conjoint test)... hence the confusion.
> however, some clusters make it through to the maxima
> listing which have both a cluster-level p > .05 and a corrected
> voxel-level p > .05. Can someone please clarify what the relationship is
> between the chosen threshold and the reported maxima, and whether all the
> clusters that are reported really do satisfy the corrected extent
> threshold?
JB
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