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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rick reynolds
June 18, 2014 11:46AM
Impulse modulation (IM) allows one to measure the magnitudes of
the individual responses.

For a slow event design (non-overlapping BOLD responses),
one can use IM with TENT functions to get the IRF for each event.
Hopefully you are in this case. To do so, just use -stim_times_IM
instead of simply -stim_times.

If the design is not a slow event design, then perhaps you will end
up having to use a fixed shape response function, such as BLOCK(3,1).
Switching to -stim_times_IM in this case would give you one beta
per trial, which is effectively the height.

- rick
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Subject Author Posted

Obtaining the peak amplitude of the IRF for each trial of a stimulus

adjacobson1 June 17, 2014 03:10PM

Re: Obtaining the peak amplitude of the IRF for each trial of a stimulus

rick reynolds June 18, 2014 11:46AM

Re: Obtaining the peak amplitude of the IRF for each trial of a stimulus

adjacobson1 June 18, 2014 06:48PM

Re: Obtaining the peak amplitude of the IRF for each trial of a stimulus

rick reynolds June 18, 2014 08:51PM