Just create a race.levels file with "Black" and "White", then include "race" as a column in your qdec.table.dat. See http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/QdecGroupAnalysis for more details.
doug
Dave Brohawn wrote:
Hello,
I want to generate screenshots of group activation in an anatomical ROI on the left and right hemisphere for two different groups of subjects at a particular contrast and time point of our analysis.
We want to use race as a covariate (categorical, with whites and blacks being the two racial groups), and the screenshots to reflect this covariate being taken into account.
Many examples I have seen on the wiki and in freesurfer archives describe cortical thickness studies, or use covariates that are continuous (age).
Is qdec the program I want to use, and how do I ensure it treats race as
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