On 07/06/2012 10:00 PM, Meng Li wrote: > Hi, freesurfer expert, > I performed the statistical analysis between two groups first in left > hemisphere, and got some regions which showed different. > 1) so if I then do multiple correction, i don't need to run the > mri_glmfit-sim command, and just press the button of the monte carlo > null-z simulation in the qdec interface, am i right? correct > 2) Whether mri_glmfit-sim --cache command line and the mc-z in qdec > get the same results, or not? and as to the option --cwpvalthresh, > should i choose 0.05 or 0.025? If you are drawing conclusions from both hemispheres then you need to use .025 > 3) And what is the difference between fdr and mc-z correction? mc-z uses a cluster-wise correction and controls the rate of false positive clusters. FDR is voxel-wise and controls the false discovery rate, which is the number of false positives relative to the total number of positives (as compared to the number of false positives relative to the total number of tests).
doug > Thanks, > Meng > > > > > > > _______________________________________________ > 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 _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
