Hi Paul,

I would use each volume (instead of betas from individual blocks) and exclude block transitions (4-6 seconds) if you have a (true) blocked design and if you expect a steady-state signal after 2-6 seconds for each block. I would only recommend 3dDeconvolve, 3dLSS, 3dTfitter, etc. as an initial step for event-related or mixed designs. We've used 3dLSS with some success for event-related designs. I haven't tried 3dTfitter yet...

[Side note: Keep in mind that 3dsvm temporally detrends the classifier output (-predictions) by default since we have seen drifts in the past. The drift depends on the level of preprocessing though. You can disable temporal detrending using the -nodetrend flag. I would also recommend using the -nopredscale flag to center the predictions around 0].

Hope this helps.

Best,
Jonathan



Edited 1 time(s). Last edit at 09/24/2020 06:00PM by jlisinski.