Dear Mark,

Thanks a lot for your reply! I am actually wondering what is the rationale of specifying the contrasts in the FEAT design file? Based on the HRF model, the experimental design and other information that is included in the FEAT design file, the contrasts could be automatically generated by FEAT after it reads the FEAT design file. If I understand it correctly, SPM does it so. When specifying the HRF model:

      jobs{1}.stats{1}.fmri_spec.bases.fir/fourier/gamma.length = par1
      jobs{1}.stats{1}.fmri_spec.bases.fir/fourier/gamma.order = par2,

SPM.mat includes the contrasts.


Wiktor Olszowy