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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swijeakumar
May 16, 2016 01:35PM
Hi all

I have a basic design efficiency question.

I want to report the efficiency of two model designs using 3dDeconvolve.

What metrics do I use to compare the models? Do I use the signal +baseline condition number (higher the better) and the matrix inverse average error (the lower the better)? Interestingly, both my models have similar numbers for these metrics but one of them (predictably) has highly correlated regressors. In such a situation, does one take into account the latter too?

Also, FSL computes an efficiency score (< 1.5 or 2 % is efficient, I believe). How does this compare to the metrics that AFNI provides?

Thank you for any advice.

Regards

Solana
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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