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st: what type of analysis for this fMRI issue
I am working on my first functional magnetic resonance imaging project. An
fMRI is being performed on each of about 50 traumatically brain injured (TBI)
subjects. A number of analyses are planned and I am not clear regarding one.
For this analysis, the outcome is a score for the person on a memory test
after they have had some memory training. The two prime predictors are the
pretest on the same test and percent-fMRI-signal-change. The complication is
that the percent-fMRI-signal-change is measured for each of, say, 30,000
voxels in the brain -- clearly, the test scores do not change for each voxel.
Thus, we have
for each of 30,000 voxels. Clearly these 30,000 models are related to each
other (since the posttest and pretest do not change).
My question: is there a "correct" model for this situation and, if yes, what
is it and what command covers it?
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