afni.nimh.nih.gov

Well, I would not say "best", it is just more complicated to have varying duration. But if they are all of the same duration anyway (across events and subjects), then it does not even matter (aside from being a little confusing if you publish the afni_proc.py command).

If they are the same duration D, I would probably go with BLOCK(D,1) for clarity, but that is up to you.

- rick