I'm trying to do simple correlations with SPM99..will someone
please help me, this should be very simple.
I have 2 PET scans per subject, one at baseline and one on drug. I
have 2 clinical rating scores, one at baseline and one after drug. I
want to look at increases in GMR after drug correlated with increases
in the clinical rating. I also want to look at negative correlations.
What model should I use and how do I define the contrasts??
Please help...
Thank you,
David Keator
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