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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March 29, 2010 01:04PM
> I have discovered that the results I get from running 3dttest versus contrasts
> in the anova are slightly different; the betas are the same but the t statistic is
> not (presumably because of the differences in the error term that goes into the design)?

Yes, that's exactly the difference. Basically GroupAna assumes the variability is the same across multiple conditions, thus is pooled together.

Gang
Subject Author Posted

GroupAna Error - 2x2 Repeated Measures Anova

Deborah Kerr March 28, 2010 09:13PM

Re: GroupAna Error - 2x2 Repeated Measures Anova

Gang Chen March 29, 2010 09:32AM

Re: GroupAna Error - 2x2 Repeated Measures Anova

Deborah Kerr March 29, 2010 11:00AM

Re: GroupAna Error - 2x2 Repeated Measures Anova

Gang Chen March 29, 2010 01:04PM