>What variable are you trying to use to correlate with (or modulate) the individual trials? Some behavioral measure?
No, I would like to use the number of distractors to modulate the individual trials, e.g., one condition (easy) has 15 distractors, while the second one (difficult) has 25 distractors.

>You put that measurement after each asterisk (*). You may use 1dMarry to combine the stimulus timing with the measurement values.
So, I would just write 60*15 90*25 120*15, etc..? Would I combine the two conditions into one stim file? or can they still be separated to use -gltsym later, e.g., +easy -difficult

Thanks