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

History of AFNI updates  

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January 27, 2023 07:48PM
The peak of SPMG1 is 0.175441 ~= 1/5.7. So theoretically, all of the betas with SPMG1 will be 5.7 times those you would get with SPMG1(0).
That scaling will not have any effect on the group statistics, aside from computational truncation differences. It should only scale the group betas by that same 5.7.

GAM will have a real difference, as that curve has a different shape.

- rick
Subject Author Posted

HRF normalization

Matthew Hoptman January 27, 2023 02:05PM

Re: HRF normalization

rick reynolds January 27, 2023 07:48PM