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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Daniel Glen
November 12, 2014 12:36PM
The answers you seek are hiding within the 3dDeconvolve help....

Search for the word "duration" within that help. Certain basis functions, like BLOCK, are always convolved with a boxcar function that represents the duration of the stimulus while others including GAM are optionally convolved with a square wave/boxcar function. Use dmBLOCK if duration is modulated per stimulus. There are an ever growing number of options with dmBLOCK and variants that are described in the help. Your best option is to try some that are relevant for your experiment and judge the fit with the -fitts options.

* ALWAYS convolved: BLOCK dmBLOCK MION MIONN
* NEVER convolved: TENT CSPLIN POLY SIN EXPR
* OPTIONALLY convolved: GAM SPMGx WAV

Also search the messageboard for other relevant threads like this recent one.

http://afni.nimh.nih.gov/afni/community/board/read.php?1,146706,146713#msg-146713



Edited 1 time(s). Last edit at 11/12/2014 12:38PM by Daniel Glen.
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Subject Author Posted

Stimulus Duration

cephalopod November 07, 2014 10:16AM

Re: Stimulus Duration

shanusmagnus November 08, 2014 03:08PM

Re: Stimulus Duration

cephalopod November 12, 2014 09:26AM

Re: Stimulus Duration

shanusmagnus November 12, 2014 11:02AM

Re: Stimulus Duration

Daniel Glen November 12, 2014 12:36PM

Re: Stimulus Duration

mb November 25, 2014 03:42PM

Re: Stimulus Duration

rick reynolds November 25, 2014 04:06PM

Re: Stimulus Duration

mb November 25, 2014 05:00PM

Re: Stimulus Duration

rick reynolds November 25, 2014 04:12PM