Summary of what happened:
I am creating .mat files of my stimulus onset time. There are 6 different “events”: Circle, Square, Emotional, Neutral, Happy, and Miss. All are stimuli shown in our fMRI task EXCEPT “Miss” - this is where we are collecting all the stimulus events where the participant either pressed the wrong button or did not press at all. I have a script that will format the data and write it to a .mat file, and I’m wondering what I do for situations where there are no misses?
I have the durations, onset times, and names all going to the correct places, but where there is a participant that does not get any presses wrong, the “Miss” name is omitted from the timing.mat file I’m creating. I can fix this, but I’m not sure what SPM12 is expecting. I found something saying that 1) “Miss” should always be in every participants .mat file whether they had misses or not, and 2) to create empty lists for the Duration and Onsets keys.
Can confirm this is the correct way of handling these situations?
Thanks!
Version:
SPM12