Hi All
i am doing an dcm analysis and right now i am having some questions and
hoped someone could help me:
1. for some subjects i cant do the parameter estimation (at least not in an
acceptable time), it stops after the first or second E-Step and doesnt go on
for several days (then i cancled the computation). I observed this for
several subjects with a model which is estimated for other subjects in under
an hour. I am using the new spm_nlsi_GN version. Any ideas what the reason
for this could be?
2. i am not quiet sure about this: In DCM you always do the analysis on an
single subject level or is there a possibility to do group statistics and
model some kind of group DCM? Or do u have to do this after estimation for
single subjects?
3. In our paradigm the subjects were shown emotional pictures and afterwards
rated the emotional strength of this pictures. Is there a possibility to use
this values as a parameter in DCM?
Thanks in advance for all answers
Christian
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