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Dear Danai, Yes, you can compare models with different number of sources - see http://www.ncbi.nlm.nih.gov/pubmed/19261714 When you do this though, make sure that all your models contain all the sources of the most complete model, and then turn off the connections you don't need (for simpler models). Hope this helps! Marta 2011/5/6 DANAY DIMA <[log in to unmask]> > Hi everyone > > I just wanted to check if we can compare directly MEG-DCM models with > different number of volumes of interest? > > Thanks in advance to anyone that answers! > > Best wishes, > > Danai > -- Dr. Marta I. Garrido Research Associate Wellcome Trust Centre for Neuroimaging University College London 12 Queen Square London WC1N 3BG United Kingdom Tel: +44(0)20 7833 7472 (ext: 4366) Fax: +44(0)20 7813 1420 Email: [log in to unmask] www: http://www.fil.ion.ucl.ac.uk