Normally use -stim_times_AM1 because you want to create a regressor that is adaptive to the varying duration across trials. I personally prefer adopting 'dmUBLOCK(-X)' instead of 'dmBLOCK' so that, to disambiguate potential confusions, the regression coefficient is explicitly associated with a specific duration X.
Gang
Edited 1 time(s). Last edit at 01/05/2021 11:09AM by Gang.