Hi all,
When using the same data, if I use a group cluster from the contrast A
- B to define an ROI for PPI analysis (functional connectivity in A
greater than B), is that necessarily double dipping?
I am inclined to argue no, since in the PPI analysis in each subject
the effects of task are removed by the (A - B) regressor that is
included in the model. But, if anyone has any references and/or advice
they can share I would be most appreciative,
best,
spiro
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