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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ScottJ
December 30, 2016 04:10PM
Hi AFNI team,

I was wondering if it would be possible to obtain model fit statistics (ideally log likelihood) at the voxel-level from 3dLME. The logic here being, as I add predictors to a multilevel model (e.g. gender, group status, etc.) I would like to identify regions (voxels) where not only does my predictor demonstrate a significant fixed effect, but its addition also creates a more parsimonious model (compared to a model without that predictor). To do this I would like to be able to compare the model fit statistics of multiple models (via chi-square or something of the sort) in a voxel-wise fashion. To my knowledge 3dLME doesn't contain an option to write out model fit statistics (please correct me if I'm wrong!), but I can image while it's running lme iteratively in R it would be possible to grab the logLik value along with the coefficients?

Thanks!
Scott
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Subject Author Posted

3dLME model fit statistics

ScottJ December 30, 2016 04:10PM

Re: 3dLME model fit statistics

gang January 03, 2017 09:12AM

Re: 3dLME model fit statistics

ScottJ January 03, 2017 02:13PM

Re: 3dLME model fit statistics

katemills January 23, 2017 03:50PM

Re: 3dLME model fit statistics

gang January 24, 2017 10:35AM

Re: 3dLME model fit statistics

katemills February 20, 2017 08:59PM

Re: 3dLME model fit statistics

gang February 22, 2017 02:47PM