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Hi Ged, Yes, I can create the appropriate contrasts in the contrast manager adding few zeros. I was just wondering if it would be possible to get the appropriate pre-defined contrasts to save some time ! I hope Volkmar will respond to me if this a really a bug ! Thank you very much for your response. Sincerely yours, Cédric > Message du 08/01/07 11:58 > De : "Ged Ridgway" > A : "Cédric Lemogne" > Copie à : > Objet : Re: [SPM] problem covarying out the realignement parameters > > > Hi Cédric, > > It doesn't sound to me like you're doing anything wrong, it might well > be a bug... hopefully someone like Volkmar will reply if so. > > In the mean time, can you simply create new contrasts yourself in the > contrast manager and use these instead of the pre-defined ones? It's > probably just necessary to create ones with the same pattern of > non-zero values but some extra zeros to pad to the correct length. > > Hope that helps, and that you get a more conclusive answer, > Ged. > > > Cédric Lemogne wrote: > > > > Dear all, > > > > I have a problem when using the "multiple conditions" option and the > > "multiple regressors" option together to set a factorial design. > > > > Actually I would like to use the "multiple regressors" option to model > > the realignment parameters as confounds > > > > When I use these 2 options for a single session, it works well and the > > required contrasts are created. > > > > However, when I try to do the same for more than a single session, the > > contrats are created without taking these regressors into account. > > > > In other words, the contrast vectors length is shorter than the total > > number of regressors. > > > > What I am doing wrong ? > > > > Any help would be much appreciated ! > > > > Cédric > > > >