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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April 19, 2017 05:06AM
Dear AFNI experts,

I understand that the assumption of Gaussian shape for spatial autocorrelation function (ACF) of the noise is essentially wrong.
Anyway, I was wondering how spatial restrictions affect the estimation of acf/fwhm values. To give an example, the usage of a mask with separate brain regions (say PCC, dlPFC and mPFC) in a GLM (and in the consequent 3dClustSim) will lead to less discrepancy between the results obtained with acf/fwhm? Why?

Thanks.
Simone
Subject Author Posted

3dClustSim, acf, and masks

smndpln April 19, 2017 05:06AM

Re: 3dClustSim, acf, and masks

gang April 19, 2017 04:58PM

Re: 3dClustSim, acf, and masks

smndpln April 27, 2017 07:22AM