Thanks Rick! That answered all my questions at once!!
I am trying to replicate the AM results a collegue did in SPM since the other fMRI-tasks has been analyzed in AFNI we want to keep it concistent in the paper.
I am no SPM person and I assume you guys don't know it super well either(?). So regarding the durations: I was told it was an event design, and you just tell SPM that. I am trying to figure out what that means in terms of duration. I found
this which has this segment:
Quote
SPM
In SPM8, all conditions are specified in
terms of their 1) onsets and 2) durations
... epochs: variable or constant duration
... events: zero duration
What happens if I set the duration to zero in AFNI? What would be the corresponding way of doing it? Or I can prope my collegue for more information regarding the actual durations. She used the SPM event design option (this is why I like AFNI).
If I do change from the dmBLOCK way of making stim-files and use e.g. BLOCK(0.6,1), will that make a difference? Given I would use the same duration in the stimfile :0.6 as in BLOCK(0.6,1)? If there is no difference it would not be worth chaning the files =)
