Dear Freesurfer experts,
I've just finished running a qdec analysis of a comparison of cortical thickness between controls and patients with 2 covariates and found a strange result.
When i set the threshold at FDR some clusters appear in red which are the corrected results from my analysis. However the rest of the cortex acquires a grey homogeneous colour that seems strange.
When i check the thresholds in qdec i found that they were set from 100 to -100...
Any ideas why this happened?
Afterwards i did the mri_glmfit simulations with these results from qdec and saw that the summary cluster table indicated a single bilateral cluster of more than 70 000 mm size, as if the program considered the homogenous grey colour as a significant result between groups.
Any help would be greatly appreciated.
Best, Joana
Sounds like something when wrong. Can you tar up the qdec output directory and drop it to me at the file drop below?
doug
Joana Braga Pereira wrote:
Dear Freesurfer experts,
I've just finished running a qdec analysis of a comparison of cortical thickness between controls and patients with 2 covariates and found a strange result.
When i set the threshold at FDR some clusters appear in red which are the corrected results from my analysis. However the rest of the cortex acquires a grey homogeneous colour that seems strange.
When i check the thresholds in qdec i found that they were set from 100 to -100...
Any ideas why this happened?
Afterwards i did the mri_glmfit simulations with these results from qdec and saw that the summary cluster table indicated a single bilateral cluster of more than 70 000 mm size, as if the program considered the homogenous grey colour as a significant result between groups.
Any help would be greatly appreciated.
Best, Joana
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
-
Douglas N Greve -
Joana Braga Pereira