afni.nimh.nih.gov

Great, thanks. This part of the help text for 3dDeconvolve made me a bit confused, and was the reason I proposed IM instead of AM.

*N.B.: You can also use dmBLOCK with -stim_times_IM, in which case
each time in the 'tname' file should have just ONE extra
parameter -- the duration -- married to it, as in '30:15',
meaning a block of duration 15 seconds starting at t=30 s.