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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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Deja vu. Peter thank you so much for finding things I should have been able to easily find myself. I'm only slightly embarrassed.
Thank you both so very much!!
by
tim_meeker
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AFNI Message Board
Hi All,
I have to admit, I believe I solved this very problem 5 to 8 years ago, but I think I forced the solution. Anyhow, what I want to do is correlate (ala 3dttest+++) a psychological score with cortical thickness across 50 subjects and obtain a group .gii or .nii or whatever group file that I can then threshold and find ROIs from the cortical thickness analysis. I have done this with FreeSur
by
tim_meeker
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AFNI Message Board
Neither am I, which is why it remains an interesting question I guess. I'll tinker with some things.
by
tim_meeker
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AFNI Message Board
Also, curious where would I find the most accurate estimation of the degrees of freedom remaining in each dataset (after preprocessing)? And across individuals how would this scale? I'm assuming it would not scale linearly or anything like that.
by
tim_meeker
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AFNI Message Board
> Are these statistics valid?
>You seem to have a simple case of traditional paired t-test. You could verify the 3dLMEr result with, for example, 3dttest++.
OK. I have those results anyway I think...
> How would I arrive at a rational statistical threshold for the mean functional connecitivity maps? the p-value of these
> maps is 1x10^-12 and the cluster extent is 54 mm^3 (2
by
tim_meeker
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AFNI Message Board
Hello Gang et al.
I am running a rather simple within subjects LMM on resting state fMRI scans of 50 subjects who experienced 2 different scans, which I label 'states'.
When I attempt to use 3dmerge to extract the mean state-dependent functional connectivity maps from the gltCode (using, e.g : 3dmerge -1clust 3 54 -1thresh 7.14 -1erode 50 -1dilate -prefix newfilenamep10-12 ‘outputf
by
tim_meeker
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AFNI Message Board