Dear SPM list readers,
I would like to correlate changes in brain activations with changes in memory performance (on neuropsychological tests) across two time points (1 year versus 10 years post-surgery). I have therefore, for each patient, two scans (1yr and 10yrs) and performance scores for those time points.
I was wondering what would be the best way to correlate these changes? I would like to see which increases and decreases in brain activations are associated with memory changes over time.
My question is, should I use a paired t-test; or should I create a new image via ImCalc for each participant, reflecting the difference between scanning sessions and then do a one-sample t-test?
Many thanks in advance for your help!
Marine
|