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Dear Rajan, You can look at the video talk at http://www.fil.ion.ucl.ac.uk/spm/course/video/#MEEG_BMS for the relevant theory. The practicalities are described in Chapter 37 of SPM12 manual. Best, Vladimir On Fri, Apr 17, 2015 at 1:31 PM, Rajan Kashyap <[log in to unmask]> wrote: > Dear Vladimir > > I have another question. It may be very basic, but important for my > analysis. > I have 21 subjects. Each subject has 2 models (1)Forward and (2) Forward > backward (FB) model. > Single subject comparison shows FB model as winning model and the same > exists for 18 subjects. > > I am unable to understand how to proceed for group level inference on > model selection. > > Kindly advice. > > Regards > Rajan Kashyap > Hong Kong Baptist University > > On Fri, Apr 17, 2015 at 12:44 AM, Vladimir Litvak < > [log in to unmask]> wrote: > >> Dear Rajan, >> >> There are 3 different choices in the GUI. One is where you choose the >> analysis type ERP/CSD/IND etc. There you should choose ERP. Second is where >> you choose the neural model ERP/SEP/CMC etc. You can start with ERP there >> as well. See >> http://journal.frontiersin.org/article/10.3389/fncom.2013.00057/full for >> more detailed discussion. >> >> Finally in the spatial model part ECD/IMG/LFP you should choose LFP and >> refer to the chapter for how to specify channels and source names for DCM. >> >> Best, >> >> Vladimir >> >> On Thu, Apr 16, 2015 at 6:50 PM, Rajan Kashyap <[log in to unmask]> >> wrote: >> >>> Dear Vladimir >>> I am just confused in that part. Instead of using the SSR, Can i Use ERP >>> as spatial model ??. >>> Then i can use ERP as my neuronal model. >>> >>> regards >>> Rajan >>> >>> On Thu, Apr 16, 2015 at 8:27 PM, Vladimir Litvak < >>> [log in to unmask]> wrote: >>> >>>> Dear Rajan, >>>> >>>> You should use the LFP spatial model for source data. The neural model >>>> can be any of ERP, CMC or NMM. See the rat anaesthesia tutorial chapter in >>>> the manual for an example of how to work with source level data. >>>> >>>> Best, >>>> >>>> Vladimir >>>> >>>> On Thu, Apr 16, 2015 at 1:36 PM, Rajan Kashyap <[log in to unmask] >>>> > wrote: >>>> >>>>> Dear all >>>>> I want to use DCM on the source waveforms of the face ERP data. >>>>> Especially i want to see how each hemisphere works. >>>>> >>>>> I want to model the source waveforms using spatial model as ERP and >>>>> connectivity model also as ERP to see what are the differences in >>>>> connection parameters in the two conditions. >>>>> Can i do it?? >>>>> >>>>> Regards >>>>> Rajan Kashyap >>>>> >>>> >>>> >>> >> >