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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gang
January 30, 2022 08:20PM
> is there a way to indicate the single subject Pthr to run through group level analysis? That is, only include voxels
> that are significant at the single level in the group level analysis?

Would this be like cherry-picking?

> it doesn't seem accurate to run a group level analysis on a non-thresholded single subject file.

In what sense it's not accurate?

> If I did, I may see significant clusters at the group level simply because the t-stat (or beta) is
> consistently greater, but still not large enough to reach significance on their own.

Significant or not, it is just an artificial line drawn in the sand that depends on many factors including experimental design, sample sizes and even randomness.

Gang



Edited 1 time(s). Last edit at 01/30/2022 08:22PM by Gang.
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Subject Author Posted

Group Analysis: Single Subject Pthr?

Dxc536 January 25, 2022 05:05PM

Re: Group Analysis: Single Subject Pthr?

gang January 30, 2022 08:20PM

Re: Group Analysis: Single Subject Pthr?

Dxc536 February 14, 2022 10:19AM