James,
I would use TENT if
1) it's expected to have some anticipation effect (the subject might respond earlier than the real stimulus onset), or
2) there might have some inaccuracies or mistakes in stimulus onset time specifications.
On other hand, if you don't see much effect at the stimulus onset time with TENT or if you don't believe either of the two scenarios happened, it's definitely more preferable to go with TENTzero: a more parsimonious model (occam's razor).
Gang
Edited 1 time(s). Last edit at 01/26/2017 10:27AM by Gang.