Hi all,
I have a question about the way to design the group level in PPI.
In the example at the PPIHowToRun wiki there are 3 EV's PSY, PHYS and the interaction.
At the end of the manual it says "This completes the set-up for the first-level analysis. You can then compare between groups at the second level as normal"
But what kind of group level design, as there are no contrasts to do here? So do i jut average the interaction EV for all the participants?
And if i have more EVs, Say PSY1, PSY2 and PHYS.
Can i do interaction between PSY1 and PHYS, interaction between PSY2 and PHYS and then compere the interactions in group level? can this be done in a paire-t design?
Thanks,
Navot
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