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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Zhengchen Cai
April 26, 2023 09:46AM
Hi Rick,

Thank you very much.

>> What is a typical range of durations?
The range of durations varies from subject to subject since the events are observational, I don't have a summary of it right now. It goes from 0.2s to ~5s, but we group events based on some domain knowledge, and usually events in one type have similar durations.

>> Personally, I tend to round the time.
I agree, I just round it to have the same number of decimals in TR, so 0.01s.

>> Note that those times (e.g., 0.2 in dmUBLOCK(-0.2)) should be constant across subjects.
This is a good point, I guess otherwise the effect in % change may not be comparable across subjects since the expected responses are not scaled in the same way.

Thanks,
Zhengchen
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Subject Author Posted

Temporal resolution in event timing 1D file

Zhengchen Cai April 25, 2023 09:45AM

Re: Temporal resolution in event timing 1D file

rick reynolds April 25, 2023 04:17PM

Re: Temporal resolution in event timing 1D file

Zhengchen Cai April 26, 2023 09:46AM