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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October 01, 2007 10:31AM
> What are the main effect F-tests comparing in 3dANOVA and
> GroupAna? Are the main effect F-tests given by 3dANOVA and
> GroupAna tests of a given factor vs baseline?

The main effect of a factor tests whethere there is any difference across all the levels of the factor. If you modeled the baseline with a parameter greater than -1 in option -polort in 3dDeconvolve, all the regressor coefficients are contrasts against baseline by default.

Gang
Subject Author Posted

F-tests in 3dANOVA and GroupAna

Laura September 28, 2007 03:16PM

Re: F-tests in 3dANOVA and GroupAna

Gang Chen October 01, 2007 10:31AM