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  

Previous Message Next Message
Message List New Topic Print View
|
smndpln
May 21, 2018 04:14AM
Dear AFNI experts,

I am using 3dNetCorr to extract 360-by-360 matrices of functional connectivity among parcels.
A colleague advised me that the standard procedure used by 3dNetCorr (i.e., averaging time series and than correlating) may not be the most accurate choice. In fact, it can be argued that correlating each voxel-pair (among each couple of RoI) and then averaging the correlations is more accurate.

1) Do you think that the two procedures are somewhat equal, or not?
2) Is there a way to apply the alternative procedure (correlating voxels among parcels, and then averaging) in 3dNetCorr?
3) -related to 2)- Is there a way to output also the standard deviation of such correlations (i.e., obtaining not only a matrix of correlations, but also a matrix of dispersion)?

Thanks in advance,
Simone



Edited 2 time(s). Last edit at 05/23/2018 09:36AM by smndpln.
Reply Quote
RSS
Subject Author Posted

3dNetCorr - Question on accuracy

smndpln May 21, 2018 04:14AM