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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rick reynolds
March 19, 2019 03:35PM
Hi Josh,

Note that if you are using GAM, BLOCK, SPMG*, or similar, then you are actually telling 3dREMLfit what the HRF is supposed to look like. The cases where the program is figuring that out are with multiple basis functions, an particularly in the case of TENT.

And in order for the program to get a useful estimate of what the HRF looks like, it is very important to model drift and motion effects, or they will corrupt the very estimates that you seek. It does not seem reasonable to remove those model parameters.

Maybe there is an aspect I am missing. Please feel free to provide more details and possibly even a model (e.g. 3dDeconvolve command).

- rick
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Subject Author Posted

Getting Relevant fits from afni_proc/3dREMLfit

Joshua B. Teves March 18, 2019 12:39PM

Re: Getting Relevant fits from afni_proc/3dREMLfit

rick reynolds March 19, 2019 03:35PM

Re: Getting Relevant fits from afni_proc/3dREMLfit

Joshua B. Teves March 21, 2019 01:51PM

Re: Getting Relevant fits from afni_proc/3dREMLfit

rick reynolds March 21, 2019 02:42PM