Show all posts by user
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
Page 1 of 1 Pages: 1
Results 1 - 11 of 11
Hi,
I'm analyzing some resting state data and I regress out nuisance regressors using 3dDetrend. I would like to also account for temporal auto-correlation after doing this, but I do not run my data through 3dDeconvolve (I'm extracting the time series from ROIs). If I wanted to use 3dREMLfit to account for the temporal autoccorelation, would I be able to run my resting state data t
by
mjalbrzikowski
-
AFNI Message Board
Yay! That's exactly what I did! I just wanted to be sure.
Thank you for your help!
Best,
Maria
by
mjalbrzikowski
-
AFNI Message Board
Hi Daniel,
Thanks for responding. We are using this template: MNI_caez_N27+tlrc.BRIK.
I gather this is in MNI space, but I just didn't know if I had to do something else to my ROIs from the MNI 152 space.
Any ideas on if my ROIs are ok or if I need to do anything else?
Thanks,
Maria
by
mjalbrzikowski
-
AFNI Message Board
Hi
I have some ROIs that are in the MNI152 space. However, all of my data is registered to the colin27 brain.
Do I need to perform warping on the ROIs from MNI space in order to use them with my data?
Thanks,
Maria
by
mjalbrzikowski
-
AFNI Message Board
Hi,
Thanks for your response. I did that (converted it back to the r-value) and now is there a way that I can identify, say the top 10% of correlations?
Thanks,
Maria
by
mjalbrzikowski
-
AFNI Message Board
Hi,
yes, I guess what I am trying to do is figure out a way to identify brain regions that have a meaningful connection between my seed region (amygdala). When I run 3dttest++, nearly all voxels are significant at very high p-value thresholds. This makes sense, given that a high high t value only indicates r is with some significance level different from 0, so i guess nearly all my voxels are s
by
mjalbrzikowski
-
AFNI Message Board
Hi AFNI experts,
I am doing a seed-based functional connectivity analysis.
I have followed the instructions for simple correlation analysis.
However, before I run the group-level analysis, I would like to calculate partial correlations to account for the relationship between my seed region and the other voxels. Is there a way to do this in AFNI?
Thank you,
Maria
by
mjalbrzikowski
-
AFNI Message Board
ok great, thank you for your time! I really appreciate your help.
Best,
Maria
by
mjalbrzikowski
-
AFNI Message Board
Hi Gang,
Wouldn't my random effect be subject, since I have multiple time points for most individuals?
by
mjalbrzikowski
-
AFNI Message Board
Hi Gang,
Thanks for responding. I actually did not copy my entire subject list, but I have many more subjects and most have 3 time points, some have 2 time points, and a few have 1 time point. So I think from the reading I've done, I should use 3dlme?
I've run the subjects at their first time point with 3dttest++ and used the covariate file to control for age & motion- but the
by
mjalbrzikowski
-
AFNI Message Board
Hi,
I am looking at resting state connectivity with an amygdala ROI longitudinally and I want to see if amygdala connectivity changes with age (inverse,invcage). I am also including mean absolute motion displacement as a nuisance covariate (motion). I tried to set up the model as below, but 3dlme gets hung up and does not continue running. I think I am doing something incorrect with the nui
by
mjalbrzikowski
-
AFNI Message Board