ans. 1. - the easiest way is to Ctrl- left mouse click on a blob, and a plot of the data at that surface vertex will appear. the group will be apparent from that (say, demented group is thinner than non-demented group). this data is significance data (log p, so '2' is 0.01), so mean and stdev wouldnt apply in that case. the file 'y.mgh' is the raw data of all subjects in the analysis, so you could extract mean and stdev from that.
ans. 2. - slide the 'annotation' opacity slider to show the annotation data (cortical parcellation). the ctrl left click will also put the region info for that vertex on the lower left of the display. see also: http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/QdecGroupAnalysis n. On Wed, 2010-12-29 at 10:49 -0500, Gallen, Courtney (NIH/NIDA) [F] wrote: > Hi, > > > > I’m currently running analyses in Qdec and have identified areas that > show significant effects in my contrasts. I have two questions related > to interpreting these results. > > > > 1. How can you interpret the effect in each “blob?” (i.e., which > group has a greater cortical surface area, etc.). Right now, all I > know is that there is an effect in certain areas. Can you export this > data to get means and standard errors? > > 2. Is there a way to localize where these effects are? E.g., a > tool that tells you this effect is located in __ area of the brain? > > > > Thanks in advance > > Courtney > > > > Courtney Gallen > > Post-baccalaureate IRTA > > Neuroimaging Research Branch > > National Institute on Drug Abuse (IRP) > > 251 Bayview Blvd > > Suite 200 > > Baltimore, MD 21224 > > Tel: (443) 740-2631 > > > _______________________________________________ > 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 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.
