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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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Hi Rick,
Thank you for your answer; it was helpful. It sounds like unless I have hypotheses that the duration of my stimuli would impact the amplitude of the BOLD response, it may be better to remove duration from the model, as the deconvolution TENT functions will account for narrower/wider HRF functions by nature of being data-driven (as opposed to a convolution, where I might want to includ
by
AMReye
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AFNI Message Board
Hello,
I'm running an amplitude modulated deconvolution using 3dDeconvolve, with TENT as the basis function. I've specified a 20 second window with 1 second radius (my TRs are 1 sec). The relevant part of the script for this looks like:
-stim_times_AM2 1 timing_file.1D 'TENT(0,20,20)' -stim_label 1 variable_name \
In my timing file, each stimulus is listed like this:
by
AMReye
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AFNI Message Board
Hello!
I'm running an amplitude modulated deconvolution with 3dDeconvolve.
I'm wondering if I need to scale the modulators before I input them in the model. I believe AFNI automatically mean-centers them, but I'm unsure if the magnitude of the modulators' ranges need normalizing. My stimuli are audiovisual (and naturalistic). If one modulator is a frequency with a range
by
AMReye
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AFNI Message Board