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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Brad Buchsbaum
December 03, 2008 01:19PM


I'd also be interested in DM or "duration modulation", where the duration of each event is modulated by another variable. FSL allows this in their "3 column" format (onset, amplitude, duration).

A recent paper by Grinband et al.* shows that amplitude modulation doesn't do that good a job of modeling variation in the HRF due to temporal factors even, apparently, for short time scales (e.g. reaction time). AM seems to be better suited for changes is stimulus intensity rather than changes in RT.



* Detection of time-varying signals in event-related fMRI designs.
Grinband J, Wager TD, Lindquist M, Ferrera VP, Hirsch J. 2008
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Subject Author Posted

3dDeconvolve: AM3?

bob cox December 01, 2008 06:58PM

Re: 3dDeconvolve: AM3?

Bob Cox December 02, 2008 09:53AM

Re: 3dDeconvolve: AM3?

Rutvik Desai December 02, 2008 10:23AM

Re: 3dDeconvolve: AM3?

Vincent Costa December 03, 2008 10:18AM

Re: 3dDeconvolve: AM3?

Bob Cox December 03, 2008 10:28AM

Re: 3dDeconvolve: AM3?

Brad Buchsbaum December 03, 2008 01:19PM

Re: 3dDeconvolve: AM3?

Bob Cox December 03, 2008 01:27PM

*** 3dDeconvolve: AM regression extended ***

Bob Cox December 04, 2008 04:21PM