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
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