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

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Gang Chen
May 26, 2006 04:30PM
> 1). The coefficients for each of the 3 regressors, A,B, and C: Are they the most
> appropriate measure of activation to be used for Group Analysis? Or are there
> other options, like partial T's andpartial F's of each Factor or the Full F?

Usually you should only use the coefficients or their contrast values, not statistical values, for group analysis.

> 2). When running a Group analysis, is thresholding done soley at the group
> level, or should an earlier threshold be done at the individual subject level first?

Thresold only at group level.

> 3).Say if we are only interested in Factor A of our GLM model from
> 3dDeconvolve. Could we just use the coeffecients of regressor A, and run an
> ANOVA on that at the Group Level.

Yes, that is good enough if you are only interested in one condition.

Gang
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Subject Author Posted

Question about Group Analysis

Michael May 26, 2006 03:31PM

Re: Question about Group Analysis

Gang Chen May 26, 2006 04:30PM

Re: Question about Group Analysis

Michael May 26, 2006 04:36PM

Re: Question about Group Analysis

Michael May 31, 2006 01:19PM

Re: Question about Group Analysis

Gang Chen May 31, 2006 02:37PM

Re: Question about Group Analysis

Michael May 31, 2006 02:52PM