Dear list members,
I am currently using DCM to analyze effective connectivity during memory
retrieval. I encountered some problems during the model estimation of some
subjects.
Here is the DCM model:
V =>FG->IFG
where V is the driving input of FG and FG is directly connected to IFG.
For most subjects, this model converges nicely. But for a few subjects, the
model does not fit. The DCM estimation stops after 3 iterations and the
effect of 'V' is null.
Any ideas why the model does not fit these subjects?
I attached the review output for two subjects.
BH_review is a subject for which the DCM model converges and AS_review is a
subject for which it does not.
Thanks
Thomas Lemmin
--------------------------------------
Institute of Neuroradiology,
University of Zurich
Winterthurerstrasse 190
8057 Zurich, Switzerland
---------------------------------------
|