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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teodora
March 25, 2004 11:06AM
Hello,

The fMRI design that I'm working on involves verbal responses to stimulis presentation (4 tasks+ fixation). Consequently there is a lot of motion in this dataset.

I was calculating the correlation coefficient between the mc_params and each of the experimental task and it seems that there is a strong correlation (corr>0.70)

=======================
I'm trying to run a residual regression and I need your guidance.

Is this what I have to do?

PROCEDURE1:
step1:

Run 3dDeconvolve with motion correction parameters as covariates
Save the residuals (-errts) in a brik file (mc_residuals+orig)

step 2:

Run again 3dDeconvolve using as input file mc_residuals+orig and model the 4 experimental tasks as covariates.

The output bucket should show the correlation of mc_params on experimental task.

My bucket is empty(clear).Is it something that I'm doing wrong?

Any other suggestions?

Thank you for your help.
Teodora
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Residual Regression

teodora March 25, 2004 11:06AM