AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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Peter Molfese
May 30, 2018 01:37PM
The debate is almost as old as (fMRI) time, with some people suggesting that you never regress out motion. But the AFNI way is to do both censor and regress out motion. Note that censoring means that those TRs don't contribute to the final stats, so the motion related to those TRs is also not considered.

I've played with motion censoring and regressors a decent amount, and while it's an imperfect solution, it works better than not including them in the model. There are suggestions of using more parameters to model motion, and in some AFNI processing there are derivatives and per-run things modeled.

You might start with this paper, and then farm the references. There's also some handy references mentioned in the ABIDE project info.

-Peter
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Censor motion vs. Regress motion derivatives

tamtam May 30, 2018 10:45AM

Re: Censor motion vs. Regress motion derivatives

Peter Molfese May 30, 2018 01:37PM