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

History of AFNI updates  

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November 25, 2019 09:44PM
Hello,

Sorry, it looks like I did not reference this anywhere in the help.

If the timing files are duration modulated (form ONSET:DUR for each event), then the program will apply those durations.

You can test it using something like example 13a, to show the events, durations and offsets (time between events = ITIs):

timing_tool.py -multi_timing stim.* -multi_timing_to_event_list GE:ALL -


If there is no :DUR modulation attached, then you should specify the duration on the command line.

The special case comes (with the same example 13a, say) when some timing files have duration modulators and some don't. In that case, it would be necessary to specify the fixed times via -multi_stim_dur. But since you would not want to override the :DUR entries, -multi_stim_dur should get -1 for any class that has modulators.

That is more than you asked about, but hopefully it clarifies things.

- rick
Subject Author Posted

Variable stimuli duration for PPI analyses

tclarkson November 18, 2019 08:04PM

Re: Variable stimuli duration for PPI analyses

rick reynolds November 25, 2019 09:44PM