Now it works if I enter the FDR in the text box -> press Enter -> click on Set Using FDR
Thank you so much. Best, Xiaojing 2010/7/9 Douglas N Greve <gr...@nmr.mgh.harvard.edu> > That is strange. Can you change the FDR to something ridiculous like .5 and > see if that changes things? > > Xiaojing Long wrote: > >> Hi, all, >> I have some questions about performing the FDR correction in Qdec. >> I ran recon-all on all my subjects, then ran the surface group analysis >> following the Qdec tutorial. There are 3 factors in the qdec.table.dat file: >> age, gender and diagnosis. In the Design tab of Qdec, I selected the >> discrete factor 'diagnosis' for analysis. When the analysis was done, there >> is a description "Does the average thickness differ between Diseased and >> Normal?" in the Display tab. I think this should be the uncorrected map. >> Then I tried to run the FDR correction for multiple comparisons. I set the >> rate to be 0.05 and 0.01 respectively. However, I found no difference >> between the results using different rates. In the Terminal, the information >> are also the same: >> "MRISfdr2vwth(): np = 163842, nv = 163842 >> Found 107008 of 163842 vertices above FDR threshold (of 1.48619)" >> I wonder whether I did the analysis correctly. Are such results possible >> or reasonable? >> Thank you in advance. >> Best, >> Xiaojing >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> 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 > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html > >
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