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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carolin31
November 16, 2018 03:22PM
Dear afni experts,

I am running for the first time a task based fMRI analysis with afni. It is a very fast event related design (short events and short inter trial intervals).
I was visiting the afni bootcamp a few weeks ago and I was recommended to run my analysis with TENT function (TENT for the regressors I care about and GAM for the regressors I don t care about, as I had some collinearity issues when using only TENT), but also try GAM for all regressors and compare the two analysis.

My question is now, what should I focus on when comparing the results from different basis functions?
Would I only look at which basis function gives me a higher beta and t-stats for the regressor I am interested in? But this might also differ for the region I am looking at.
Should I instead compare the full model F statistics?

What is recommended for this case?

Thank you very much in advance
Carolin
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Subject Author Posted

comparing different basis functions

carolin31 November 16, 2018 03:22PM

Re: comparing different basis functions

gang November 16, 2018 04:42PM

Re: comparing different basis functions

carolin31 November 26, 2018 03:48PM

Re: comparing different basis functions

gang November 26, 2018 04:57PM