fMRIPREP: Which regressors for best Global Signal Regression Comparison

[ChrisGorgolewski]

@alexlicohen

I ran into Chris M. at OHBM and he pointed out that when using the aCompCor regression strategy, the cosine regressors should be used too (this is not documented, we should change that)

There is already an issue open for this: Add description of CosineX regressors to the documentation · Issue #1167 · nipreps/fmriprep · GitHub

@alexlicohen

For the aCompCor regression:
aCompCor00, aCompCor01, aCompCor02, aCompCor03, aCompCor04, aCompCor05, X, Y, Z, RotX, RotY, RotZ, (and we should also be adding in: Cosine00 Cosine01 Cosine02 Cosine03)?

For the standard regression:
CSF, WhiteMatter, GlobalSignal, X, Y, Z, RotX, RotY, RotZ

For ICA-AROMA:
What if anything, should be regressed out from that nii.gz file to be most similar to the above?

I would add Cosines (they perform high pass filtering) and motion parameters in all variants. Even if potentially redundant it should not hurt.