I don't think it makes sense to correct using cohen's d. I've never heard of it at least doug
On 03/27/2014 06:31 AM, L. Schweren wrote: > > Dear FreeSurfer experts, > > For my group-level analyses, I created Cohen’s D effect size maps. Now > I looking the different methods to correct for multiple comparisons > (FDR and MC-simulations), it seems to me they are based on p-values, > not on effect sizes. I tried applying FDR-correction in tksurfer on > the effect size maps. This indeed results in a higher threshold for > clusters to appear, but I am not sure whether this is a valid tool to > use in statistical maps other than .sig ? > > As a p-value reflects the “chances” of finding this effect by chance > and the MC-correction is about reducing the “chance of false > positives”, and Cohen’s D not reflecting such chances, is correction > for multiple comparisons even sound when reporting effect sizes? If > so, what would be the best approach to determine an MC-corrected > threshold for effect sizes? > > Thanks again for your help, you have been very helpful so far! > > Best wishes, > > Lizanne > > > > _______________________________________________ > 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: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ 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.
