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  

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aty
April 18, 2014 01:01AM
Hi all,

In our analysis, we ran the 3dconvolve on our dataset and when we were looking at our contrast of interest in 3dttest+, we included a covariate of trait measure scores. As we decrease the p value, the cluster of interest remain, however, they do decrease in voxel size. My question is that when a covariate is used, is there any statistical reasoning that would allow us to reasonably use a lower threshold?

Thanks in advance!
Subject Author Posted

Justifying a lower threshold when using a covariate with 3dttest

aty April 18, 2014 01:01AM

Re: Justifying a lower threshold when using a covariate with 3dttest

gang April 18, 2014 03:25PM

Re: Justifying a lower threshold when using a covariate with 3dttest

aty April 23, 2014 03:25PM

Re: Justifying a lower threshold when using a covariate with 3dttest

gang April 23, 2014 05:31PM

Re: Justifying a lower threshold when using a covariate with 3dttest

aty May 16, 2014 04:50PM

Re: Justifying a lower threshold when using a covariate with 3dttest

gang May 18, 2014 12:32PM

Re: Justifying a lower threshold when using a covariate with 3dttest

aty June 16, 2014 01:46PM

Re: Justifying a lower threshold when using a covariate with 3dttest

gang June 16, 2014 03:51PM

Re: Justifying a lower threshold when using a covariate with 3dttest

rick reynolds May 19, 2014 12:35PM