Dear DCM experts!
We would like to ask your opinion on two matters, please:
1. We have 3 conditions in our study (Experimental, Control, Baseline). Our DCM includes only Experimental & Control conditions.
We compared two analyses:
i. DCM using F contrast that includes all three conditions.
ii. DCM using F contrast that includes only two conditions (without Baseline)
We found a difference in the explained variance.
It seems weird because the Baseline condition is not defined in the intrinsic conditions in both DCMs.
What is the reason? Which F contrast is recommended?
2. Is there any preventive to include many between-regions modulatory connections?
We did not find so, but we want to make sure it is doesn't come at the expense of something else.
Thank you
Tammar
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