In a 2x2 block design, I’m getting some anomalous main-effects that I wouldn’t expect.
As a sanity check, I want to look at a comparison of activation during task vs during baseline (i.e. activation during task as compared to activation during rest/fixation), irrespective of condition, or for a specific condition. I know this is a common option on SPM, but I can’t find any source on what it means statistically.
The output of 3dDeconvolve only gives me the option to see the effect of a given condition within the model, which is not the same thing.
I could, of course, run an entirely new 3dDeconvolve with new stimtime files as if all blocks were a single condition, but a) I would have to re-run 3dDeconvolve on all subjects, and b) would not allow me to see how much activation is seen for just one single condition.
I’d be grateful for any help!