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
|
gang
July 21, 2016 10:08AM
> I want to report the efficiency of two model designs using 3dDeconvolve.


Do the two designs have the same experiment parameters such as number of time points, number of conditions, number of trials per condition, etc.?

> What metrics do I use to compare the models?

Efficiency is tied to a specific test in a model. Suppose that you have three conditions/tasks, and in the end there are a few possible tests such as b1 - b2, b1 - b3, and b2 - b3. The efficiency for b1 - b2 might be different from the one for b1 - b3.

> Do I use the signal +baseline condition number (higher the better) and
> the matrix inverse average error (the lower the better)?

The efficiency might be better characterized through the normalized standard error. See discussion here:

[afni.nimh.nih.gov]

Gang
Reply Quote
RSS
Subject Author Posted

Design matrix efficiency

swijeakumar May 16, 2016 01:35PM

Re: Design matrix efficiency

swijeakumar July 20, 2016 10:26PM

Re: Design matrix efficiency

gang July 21, 2016 10:08AM