Surface Based Group Analysis
This quiz relates to the content in the FreeSurfer tutorial titled Surface Based Group Analysis (
By the end of the tutorial, you should know how to:
1. Create a design matrix or FSGD file
2. Create a contrast file
3. Assemble data by running mris_preproc and mri_surf2surf
4. Run a GLM analysis using mri_glmfit
5. Visualize the analysis using freeview
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Are you in the FreeSurfer course?
The contrast is a vector that specifies the hypothesis we are testing.
What colors are associated with a negative and positive correlation?
Which threshold value corresponds to a p-value of less than 0.0001?
Which threshold value corresponds to a p-value of less than 0.05?
For the experiment in the tutorial, what was the degree of freedom?
Hint: You can find this in the dof.dat file
For the experiment in the tutorial, what was the full width half max?
Include all digits. Hint: You can look in the fwhm.dat file.
How many frames does beta have?
Hint: run mri_info on lh.gender_age.glmdir/beta.mgh
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