disabling the extent threshold for conjunction analyses is hard (well...
;) coded in spm. I think the idea is that, if a small cluster survives
the conjunction analysis, it should always be considered valid. I can
see that point, but I can also see that one distrusts biologically
implausibly small clusters. If you want to specify a cluster extent for
a conjunction analysis, you will have to modify spm_getSPM.m (I think)
where this is set somewhere near the bottom.
> Hi all,
> I'm using SPM5 do to a conjunction analysis of two contrasts. I'd like to show clusters with at least 100 voxels. However, in the Results panel for conjunction, after selecting "none" for "p value adjusted to," it did not ask for the setup of extent threshold. Can anyone tell me how to do it? Thanks in advance.
PD Dr. med. Marko Wilke
Facharzt für Kinder- und Jugendmedizin
Leiter, Experimentelle Pädiatrische Neurobildgebung
Abt. III (Neuropädiatrie)
Marko Wilke, MD, PhD
Head, Experimental Pediatric Neuroimaging
University Children's Hospital
Dept. III (Pediatric Neurology)
D - 72076 Tübingen, Germany
Tel. +49 7071 29-83416
Fax +49 7071 29-5473
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