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
|
Abhishek
June 08, 2006 05:35PM
Hello,

I calculated percent signal change (psc) for each of my 12 subjects for each of the 3 conditions (A,B,C). I then averaged the percent signal change across 12 subjects to get average psc for A, avg psc for B and avg psc for C. I then wanted to compare the psc's across A,B and C to see if there were significant differences across each. So I performed 3dmaskave to get a mean and a Sigma for each of the 3 conditions. However, I also got different numbers of voxels which were 'active' under each of the three conditions. So, how can I incorporate all the three measures - mean, sigma and the number of active voxels in order to make a meaningful comparison across A,B and C?

Thanks.
Abhishek.
Reply Quote
RSS
Subject Author Posted

Statistical analysis with percent signal change

Abhishek June 08, 2006 05:35PM

Re: Statistical analysis with percent signal change

Gang Chen June 09, 2006 12:15PM