Hi SPM list,
Does it make sense to contrast conditions with different trial
duration? I.e., one with 2s presentation of the stimulus and the other
of 5s (convolved with 2s and 5s HRF, respectively).
I imagine not, because the beta values will only tell if the HRF fits
more or less well the signal and cannot tell if condition A produces
more activity then condition B. But what is the right way to think