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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June 05, 2012 10:23AM
Giacomo Perri Wrote:
-------------------------------------------------------
> I need to do a voxel-by-voxel correlation between
> conditions A and B across a group of 40 subjects.
> In other words, I would like to find for which
> voxels activation in these two conditions covaries
> across my subject group. I just cannot figure out
> a way of doing this. Any help would be highly
> appreciated. Thanks in advance.

Giacomo,

You can try one of the following two approaches:

1) 3ddot -demean
2) 3dttest++ using one of your conditions as a covariate

Gang
Subject Author Posted

Correlation between conditions across subjects

Giacomo Perri June 05, 2012 08:45AM

Re: Correlation between conditions across subjects

gang June 05, 2012 10:23AM

Re: Correlation between conditions across subjects

Giacomo Perri June 05, 2012 10:42AM

Re: Correlation between conditions across subjects

gang June 05, 2012 11:55AM