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Dear Karl and DCM coders/users, I would like to apply DCM network discovery to analyze some fMRI data. I have been trying to understand whether the algorithms are already available within SPM8 (respectively, within the alpha version SPM12_r4782). Can you please confirm that the function spm_dcm_diagnose.m does the inversion of a full connectivity model to select the best reduced model, as described in your Neuroimage 2011 paper? Could you please provide some basic information on how to use this script and how to interpret its output? E.g. what happens if I choose the A and C matrices within DCM.Ep as parameters to be considered (provided this does make any sense): >> spm_dcm_diagnose(DCM,'A','C') How do I find out how the best reduced model looks like? Is this info stored anywhere? Thank you and very best wishes, Marco -- Marco Tettamanti, Ph.D. Nuclear Medicine Department & Division of Neuroscience San Raffaele Scientific Institute Via Olgettina 58 I-20132 Milano, Italy Tel. ++39-02-26434888 Fax ++39-02-26434892 Email: [log in to unmask] Skype: mtettamanti