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 07, 2023 10:52PM
> COV (mean framewise displacement) is (I believe) a within-subject variable.

So, COV varies across the combinations among the three factors W1-3 for each subject?

> Is it possible to specify corSymm instead of corAR1?

corSymm() is used to specify the variance-covariance structure in the residuals. I would not worry too much about the residuals. Instead, it might make sense to try

-ranEff “~1+COV”

Gang
Subject Author Posted

var-cov structure 3dLME

hansvanderhorn March 03, 2023 11:32AM

Re: var-cov structure 3dLME

gang March 04, 2023 09:45AM

Re: var-cov structure 3dLME

hansvanderhorn March 06, 2023 01:06PM

Re: var-cov structure 3dLME

hansvanderhorn March 07, 2023 03:52PM

Re: var-cov structure 3dLME

gang March 07, 2023 10:52PM

Re: var-cov structure 3dLME

hansvanderhorn March 07, 2023 11:48PM

Re: var-cov structure 3dLME

hansvanderhorn March 08, 2023 10:45AM

Re: var-cov structure 3dLME

gang March 08, 2023 02:51PM