> isn't there already the 'original' regressor which was in the 'original'
> model before any ABI regressors were added which is the 'mean
> regressor' .
No, you are not supposed to put an 'original' regressor in the model if you want to modulate this regressor with -stim_times_AM2 in 3dDeconvolve. So there are only 2 regressors for each modulated condition type.
Gang