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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Gang Chen
May 03, 2004 03:22PM
What are the pros and cons of these two options?

Other than different complexities of processing steps, the big difference between the two approaches (simple regression or deconvolution with -stim_nptr plus regression) is whether you want to model the impulse response functions of your stimuli. The choice would be mainly based on whether you trust any default hrf's in waver.

If you want to use waver to generate regressors for 3deDeconvolve, you can either set option -tstim with an input of those time moments when stimulus occured, or use option -input of 0's and 1's at each 0.5 seconds. As far as I know there is no such sampling program in AFNI to sample the output at different rates, but it is easy to do so in Matlab, or to write a shell script file for such a purpose.

Gang
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Sub-TR Stimulus Presentation, Waver, and 3dDeconvolve

Lisa Eyler May 03, 2004 01:58PM

Re: Sub-TR Stimulus Presentation, Waver, and 3dDeconvolve

Gang Chen May 03, 2004 03:22PM