Hey everyone:

Sorry for the beginner question. I want to look at the response of a particular ROI to stimuli on a trial-by-trial basis. After performing a more 'traditional' ROI analysis on the beta weights of (e.g.) the amygdala I found no difference in the amygdala's response to different stimuli but I believe this is in large part because the amygdala habituates quickly. So basically I want to look at the amygdala's response (and potentially the IRF) to trial 1, trial 2, etc. Like a lot of studies though, my design is event related (not block) so I can't just look at the scaled time course (pre deconvolution).

Is there an option in the deconvolution program (or a different program) where I can get trial by trial responses or trial by trial IRFs?
Will `-stim_times_IM` give me what I'm looking for? It seems like this might work to give me individual numbers - betas? - that I could pull out of an ROI mask to show how the ROI responds over which, which would be one of the things I want.

I also know I can get IRFs with the `iresp` option but does that just give me one average IRF? If so, is there a way to get individual trial IRFs for a specific ROI?

Thank you so much.
-Lauren