There was an update to the files related to cluster p-values:
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r4635 | guillaume | 2012-02-01 19:09:45 +0000 (Wed, 01 Feb 2012) | 3 lines
Changed paths:
M /branches/spm8/spm_VOI.m
M /branches/spm8/spm_uc_clusterFDR.m
M /branches/spm8/spm_uc_peakFDR.m
Porting r4632:4633 from trunk:
bug fix for topological FDR and SVC.
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r4645 | guillaume | 2012-02-03 17:45:44 +0000 (Fri, 03 Feb 2012) | 2 lines
Changed paths:
M /branches/spm8/spm_uc_clusterFDR.m
M /branches/spm8/spm_uc_peakFDR.m
Porting r4644 from trunk.
I suspect that this is causing the differences.
Best Regards, Donald McLaren
=================
D.G. McLaren, Ph.D.
Research Fellow, Department of Neurology, Massachusetts General Hospital and
Harvard Medical School
Postdoctoral Research Fellow, GRECC, Bedford VA
Website: http://www.martinos.org/~mclaren
Office: (773) 406-2464
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On Wed, Sep 12, 2012 at 5:29 AM, Katharina Wittfeld
<[log in to unmask]> wrote:
> Hi,
>
> yesterday I updated SPM 8 r4290 to r4467. After hesitating for a long time because our MRI scanning of two large cohorts is still going on and initially I didn't wanted to change software inbetween.
>
> But when I looked through the notes what's new on the current version I recognized that there were quite a number of really nifty changes that justified the effort to preprocess the 3000 scans again.
>
> When I recalculated one of our analysis I observed differences in the cluster-level p-values (p_FWE-corr and p_uncorr) all the other columns are the same. Can't say anything about cluster-level q_FDR-corr since the column is empty like in the previous SPM release.
>
> Since the manual is not so detailed in the explanation of the whole brain statistics output, I hope that someone can point out to me what method in the background changed the p-values between the versions.
>
> Thank you very much!
>
> Best wishes,
> Katharina
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