hi Doug, A follow up question: when I look at the xxx.ocn.y.dat for a cluster where group differences in surface area have been identified the values are all less than 1 (e.g. 0.761374) even though the cluster size is reported as 680 mmsq. does the y value correspond to .76 mmsq average area for that subject in that cluster or does the y value in the context of surface area analyses represent something else? (or does it need to be multiplied by some factor?)
Thanks!
On Wed, Mar 20, 2013 at 2:39 PM, Douglas N Greve greve@nmr.mgh.harvard.eduwrote:
They are the input (mri_glmfit --y y.mgh) averaged over the clusters. They are raw input, no detrending. doug On 03/20/2013 05:16 PM, Laura M. Tully wrote:
Hello experts,
could someone clarify for me what the y values in the xxx.ocn.y.dat files represent following glmfit-sim? are they the residualized y values of avg cortical thickness in that specific cluster after regressing out the effect of any predictor variables in the glm?
Thanks!
Laura.
-- Laura M. Tully, MA Social Neuroscience & Psychopathology, Harvard University Center for the Assessment and Prevention of Prodromal States, UCLA Semel Institute of Neuroscience ltully@mednet.ucla.edu mailto:ltully@mednet.ucla.edu ltully@fas.harvard.edu mailto:ltully@fas.harvard.edu 310-267-0170 -- My musings as a young clinical scientist: http://theclinicalbrain.blogspot.com/ Follow me on Twitter: @tully_laura
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