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
June 07, 2021 04:10PM
Harriet,

> Question 1 - event vs block

It does not really matter much you would label each trial as long as you properly account for the duration. In your case, you can specify the trial duration through the basis function such as BLOCK(8,1). If the duration varies across trials, one solution is to use dmUBLOCK(-X)

> Question 2

You can use basis functions such as TENTzero and CSPLINzero.

> Question 3

Most of the time you're supposed to provide stimulus timing, and use the basis function to determine how you want to model/capture the hemodynamic response.

Gang
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Subject Author Posted

Event vs. block related design/ analysis

hdempseyjones June 07, 2021 02:35AM

Re: Event vs. block related design/ analysis

gang June 07, 2021 04:10PM