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  

|
May 07, 2013 06:33PM
Simple -- every measurement is duplicated. Since the t statistic (1 sample, say) is something like

t = (sample mean) / sqrt( sample variance / N )

if you accidentally duplicate datasets (either .HEAD or .BRIK can be used as input filenames, but using both gives each dataset TWICE), then N is bigger, so t is bigger -- artificially.
Subject Author Posted

3dttest++ help

Harrison McAdams May 07, 2013 12:53PM

Re: 3dttest++ help

rick reynolds May 07, 2013 03:28PM

Re: 3dttest++ help

harrison May 07, 2013 04:48PM

Re: 3dttest++ help

Bob Cox May 07, 2013 06:33PM