Yes, I think so On 9/6/19 12:56 PM, Barletta, Valeria wrote: > I did a correction for multiple comparison for every analysis... The > interaction survived. > The interaction voxels do not overlap, apparently. So can I use doss > and consider my results ok? > ------------------------------------------------------------------------ > *From:* freesurfer-boun...@nmr.mgh.harvard.edu > <freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Greve, Douglas > N.,Ph.D. <dgr...@mgh.harvard.edu> > *Sent:* Friday, September 6, 2019 12:46 PM > *To:* freesurfer@nmr.mgh.harvard.edu <freesurfer@nmr.mgh.harvard.edu> > *Subject:* Re: [Freesurfer] Fw: question on GLM > See whether the interaction survives correction for multiple > comparisons. If it does not, then proceed with doss. If it does not, > see whether the interaction voxels overlap with your contrast of > interest; if not, then proceed with doss. > > On 9/6/2019 11:28 AM, Barletta, Valeria wrote: >> So when I use doss (and the contrast -1 +1 0), I have very similar >> results to those that I got when I completely remove age: >> >> >> ------------------------------------------------------------------------ >> *From:* freesurfer-boun...@nmr.mgh.harvard.edu >> <mailto:freesurfer-boun...@nmr.mgh.harvard.edu> >> <freesurfer-boun...@nmr.mgh.harvard.edu> >> <mailto:freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Greve, >> Douglas N.,Ph.D. <dgr...@mgh.harvard.edu> <mailto:dgr...@mgh.harvard.edu> >> *Sent:* Friday, September 6, 2019 10:38 AM >> *To:* freesurfer@nmr.mgh.harvard.edu >> <mailto:freesurfer@nmr.mgh.harvard.edu> >> <freesurfer@nmr.mgh.harvard.edu> <mailto:freesurfer@nmr.mgh.harvard.edu> >> *Subject:* Re: [Freesurfer] Fw: question on GLM >> Did you try using DOSS? >> >> On 9/6/2019 9:51 AM, Barletta, Valeria wrote: >>> Dear Doug, >>> As you suggested yesterday, I launched the GLM to check for >>> interactions group-age with the contrast: >>> 0 0 +1 -1 >>> And I obtained this image: >>> >>> Then I re-launched my model including age as a covariate and I >>> obtained very similar results: >>> >>> >>> Finally, I re-launched the model excluding age and I obtained a very >>> different thing, which is actually more consistent with my data: >>> >>> >>> How shall I interpret this? Shall I exclude age from my analysis? (I >>> do not really expect it to have an influence on my variable y) >>> >>> Thank you, >>> Vale >>> ------------------------------------------------------------------------ >>> *From:* freesurfer-boun...@nmr.mgh.harvard.edu >>> <mailto:freesurfer-boun...@nmr.mgh.harvard.edu> >>> <freesurfer-boun...@nmr.mgh.harvard.edu> >>> <mailto:freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of Greve, >>> Douglas N.,Ph.D. <dgr...@mgh.harvard.edu> >>> <mailto:dgr...@mgh.harvard.edu> >>> *Sent:* Wednesday, August 28, 2019 6:03 PM >>> *To:* freesurfer@nmr.mgh.harvard.edu >>> <mailto:freesurfer@nmr.mgh.harvard.edu> >>> <freesurfer@nmr.mgh.harvard.edu> <mailto:freesurfer@nmr.mgh.harvard.edu> >>> *Subject:* Re: [Freesurfer] Fw: question on GLM >>> It is showing >>> b = g2 - g1 >>> so negative means that g1 > g2 >>> >>> >>> On 8/28/19 1:59 PM, Barletta, Valeria wrote: >>> > >>> > Forgot to report my contrast matrix: >>> > >>> > -1 1 0 0 >>> > >>> > >>> > Thanks, >>> > Valeria >>> > >>> ------------------------------------------------------------------------ >>> > *From:* Barletta, Valeria >>> > *Sent:* Wednesday, August 28, 2019 1:02 PM >>> > *To:* Freesurfer support list <freesurfer@nmr.mgh.harvard.edu> >>> <mailto:freesurfer@nmr.mgh.harvard.edu> >>> > *Subject:* question on GLM >>> > Good afternoon! >>> > I have a question on the Freesurfer GLM. >>> > The command: >>> > >>> > mri_glmfit-sim --glmdir >>> > ${glm_dir}/${hemi}_contrast-${contrast}_${surfname_cme} --cache >>> 1.3 neg >>> > >>> > is giving me blue clusters (see attached picture). Do blue clusters >>> > mean that my variable y is LOWER in the FIRST or the SECOND group >>> > listed in the FSGD file? >>> > >>> > Thanks, >>> > Valeria >>> > >>> > _______________________________________________ >>> > Freesurfer mailing list >>> > Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu> >>> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> >>> >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu> >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu> >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> >> >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu <mailto: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
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