Thanks, for you responses Doug and Pratap. But, both of your responses need more clarification, because I believe that we are not all referring to the same 'max'.
Doug: I understand that when I display the sig.cluster.mgh that the a CWP value of 0.0001 would be displayed as a 4 by the color bar in tksurfer, since it is the -log10(p). However, in this case, which is about the cluster growing summary, the -log10(p) of the CWP does not equal the Max. Max is -3.312 and the CWP is 0.08250. Or an additional example form another sig.cluster.summary, where the Max is -4.310 and the CWP is 0.0192. ClusterNo Max VtxMax Size(mm^2) TalX TalY TalZ CWP CWPLow CWPHi NVtxs Annot 1 -4.310 40526 376.78 -12.0 -66.1 5.4 0.01920 0.01750 0.02100 706 lingual In Pratap's email his answer to my question of what is the max in the CWP is, "Yes thickness. The MAX indicates the maximum -log10(pvalue) in that cluster." Which, is stating that it is both the thickness and the pvalue. I really think that it is thickness measure, but need some clarification from mgh. So, is the Max in column 2 of the cluster growing summary report, from monte carlo simulations, thickness? Thanks, Judith S. On Thu, Jun 4, 2009 at 9:25 AM, Douglas N Greve <gr...@nmr.mgh.harvard.edu>wrote: > It will be whatever you used as input. In this case, it is the -log10(p) > value of the maximum in the cluster (not the thickness value). > > doug > > > Pratap Kunwar wrote: > >> Hi Judith, >> >> Yes thickness. The MAX indicates the maximum -log10(pvalue) in that >> cluster. >> >> >> >>> Hi all. After looking over our monte-carlo results, I a simple question >>> about the sig.cluster.summary output. >>> >>> Is the " Max" in column 2 below a measurement of thickness? >>> thickness, is the correct interpretation the following: the most >>> significant >>> cluster is in the laterorbitofrontal region. >>> >>> >> yes at lateral orbital frontal. >> The max vertex in that >> >> >>> cluster >>> has an average thickness of 3.312 mm and the negative directionality >>> indicates that it is thinner in that region than in the fsaverage (from >>> freesufer) used in the group analysis/simulations? >>> >>> >> yes you are correct. >> >> >>> If it does not refer to thickness, is it a statistic, etc? >>> >>> # Minimum Threshold 2 >>> # Maximum Threshold infinity >>> # Threshold Sign abs >>> # AdjustThreshWhenOneTail 1 >>> # Area Threshold 0 mm^2 >>> # CSD thresh 2.000000 >>> # CSD nreps 10000 >>> # CSD simtype mc-z >>> # CSD contrast lh-Avg-thickness-CAQ-CCI >>> # CSD confint 90.000000 >>> # Overall max 2.05497 at vertex 92846 >>> # Overall min -3.3122 at vertex 60632 >>> # NClusters 11 >>> # Total Cortical Surface Area 65416.6 (mm^2) >>> # FixMNI = 1 >>> # >>> # ClusterNo Max VtxMax Size(mm^2) TalX TalY TalZ CWP >>> CWPLow CWPHi NVtxs Annot >>> 1 -3.312 60632 278.00 -15.2 47.7 -15.4 0.08250 >>> 0.07900 0.08600 341 lateralorbitofrontal >>> 2 -3.231 51202 118.54 -39.5 24.9 16.9 0.53620 >>> 0.52980 0.54260 212 rostralmiddlefrontal >>> 3 -3.229 67407 163.06 -19.2 12.0 46.9 0.36360 >>> 0.35740 0.36980 337 superiorfrontal >>> 4 -2.463 117667 37.51 -47.8 -50.8 8.0 0.63240 >>> 0.62620 0.63860 79 bankssts >>> 5 -2.379 151243 12.92 -30.9 -42.8 36.6 0.63240 >>> 0.62620 0.63860 38 superiorparietal >>> >>> I am trying to finish writing up my results and just need answer to this >>> question to continue. >>> >>> Thanks, >>> >>> Judith S. >>> Mind Research Network >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> >>> >> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> >> >> >> > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu > Phone Number: 617-724-2358 Fax: 617-726-7422 > > In order to help us help you, please follow the steps in: > surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > > >
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