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Hi Amy You also need to demean your Data using "-D" option in Randomise. > Date: Fri, 5 Oct 2012 04:39:08 +0100 > From: [log in to unmask] > Subject: [FSL] tbss correlation > To: [log in to unmask] > > Hello, > > I want to look at the correlation between 16 patients' FA vs their behavioral data. I'd like to know if my glm setup is correct. Under the Group column, I put all 1's, then I created 1 EV and filled them with demeaned behavioral scores. Two contrasts, 1 for positive correlation, -1 for negative correlation. > > My other question is whether to use the "-D" option when running randomise? > > Thanks, > Amy