Hi Jessica,
If you really want to have each grouping of 4 have exactly 1
stop stimulus, then this seems reasonable. But as there are
still only 2 stimulus classes, there should only be 2 stim files
given to 3dDeconvolve (or afni_proc.py).
You can use timing_tool.py to put the 4 stop files together,
and then the 12 go files. Input one stop file, and then use
multiple -extend options for the other 3 stop files, for example.
- rick