Hi SPMers,
I have completed a PPI analysis within each subject in the study. My
subtraction(basic fMRI design)contrast was Rest>Task [1-1] from which I
isolated a VOI (PCC) and ran the PPI analysis. I then ran a 1-sample ttest
with the PPI Rest>task rusulting con.img files to look at single group
results by using a contrast of [1]. Would a contrast of [-1] in the final
analysis yield the PPI group stats for Task>rest? OR Would I return to
the subtraction analysis where I would there use Task>Rest[-11] and pull
the VOI from there to continue on with the PPI .
Please let me know the correct way of running this.
Maria
|