Hi FSLexperts,
i have 4 different groups (less to more symptoms severity):
1.- A control group
2.- Mild patients
3.- Severe patients
4.- Chronic patients
i have already run TBSS and randomise these groups separately (i.e. Control VS Mild, Control VS Severe, Control VS Chronic) in Glm and after that i get fslmean values from them. The thing is that Controls fslmean values vary according to the analysis and I would like this value remains constant. That's why i would like to run all groups together.
How can i run all the groups together in TBSS and after that wich kind of design matrix and contrast in Glm for 4 groups?
Many thanks!
Patricia.
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