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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Robin
February 05, 2019 12:21PM
Just adding in (same lab)

In a "normal" 3dttest++ scenario we e.g. test if two groups differ (in beta values) and we get a significant cluster. From this cluster we extract the betas (the same betas the 3dttest used to get a significant cluster) so that we can make nice plots (and if it's an ANOVA we can do post-hoc). These betas should, of course, also produce a significant difference if we compare them e.g. Excel as well.

But when we run a 3dttest++ with covariates and the covariates are responsible for getting the significant cluster it's not enough to just extract the betas, we also need to incorporate the covariates in some way. I think it is here that we don't quite know what to do to be able to "alter" the betas with the covariates to that the significance show up in Excel as well.

At least that is my problem. :)

Thanks!
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Subject Author Posted

Beta extraction with covariate

giono February 04, 2019 09:32AM

Re: Beta extraction with covariate

rick reynolds February 05, 2019 11:18AM

Re: Beta extraction with covariate

Robin February 05, 2019 12:21PM

Re: Beta extraction with covariate

rick reynolds February 05, 2019 02:44PM