Hi Afni experts,

I am attempting to run a parametric modulation analysis. There is some old data sitting here where participants were responsable for finding a target letter surrounded by several distractors, and there were 2 conditions: easy and difficult, with difficult having more distractors than the easy condition.

How do I set up my 3ddecon script for such analysis? I know I have to use the stim_times_AM2 for this, but for my married parameters, I don't know what to use. This is how I have my script so far

-stime_times_AM2 1 easy.1D 'BLOCK(21,1)' -stim_label 1 'easy' \
-stime_times_AM2 2 difficult.1D 'BLOCK(21,1)' -stim_label 2 'difficult' \

and have stimulus files for each condition, which contain the onset, e.g., 67*???, where 67 is the onset, but I dont know what should go after the *

Thanks,
OM