Surface Based Group Analysis

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This quiz relates to the content in the FreeSurfer tutorial titled Surface Based Group Analysis (https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/GroupAnalysisV6.0)

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

Name (optional)

Are you in the FreeSurfer course? *

Yes

The contrast is a vector that specifies the hypothesis we are testing.

1 point

True

False

Clear selection

What colors are associated with a negative and positive correlation?

2 points

Red

Blue

Green

Negative correlation

Positive correlation

Clear selection

Which threshold value corresponds to a p-value of less than 0.0001?

1 point

Clear selection

Which threshold value corresponds to a p-value of less than 0.05?

1 point

2.5

1.5

Clear selection

For the experiment in the tutorial, what was the degree of freedom?

Hint: You can find this in the dof.dat file

1 point

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.

1 point

How many frames does beta have?

Hint: run mri_info on lh.gender_age.glmdir/beta.mgh

1 point

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