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Dear FS experts,
Hi!
I have a very basic question about GLM model in FS-FAST.
After GLM analysis, there is a beta.nii under the analysis/ directory and a ces.nii under each contrast/ directory.
In the tutorial, beta.nii is the regression coefficients and ces.nii is contrast effect size (contrast matrix * regression coef).
My question is :
1. both of them are regression coefficients, what’s the difference bewteen beta.nii and ces.nii.？
2. I want to do ROI analysis and extract the signal change in the given ROI from each individual. Which value represent the signal change (beta, ces, ceavar or t)?
Any suggestions are welcome!
Thanks
Star
Fudan University
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