Clusterwise Correction for Multiple Comparisons (Permutation)
This quiz relates to the content in the FreeSurfer tutorial titled Clusterwise Correction for Multiple Comparisons (
https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/MultipleComparisonsV6.0Perm
)
By the end of the tutorial, you should know how to:
1. Run the analysis to get the uncorrected maps using mri_glmfit
2. Run the permutation simulations using mri_glmfitsim
3. Correct for multiple comparisons
* Required
Name (optional)
Your answer
Are you in the FreeSurfer course?
*
Yes
No
Where is the information for the simulation stored?
1 point
Design matrix
Cluster Simulation Data (CSD) file
FSGD file
P is the probability of seeing a maximum cluster that size or larger during a simulation
1 point
True
False
What command should be run to get the initial analysis to get uncorrected results?
Only include the name of the command without any flags.
1 point
Your answer
From the example in the tutorial, what is the clusterwise pvalue for cluster #21?
Hint: A summary of the clusters is available in perm.th40.abs.sig.cluster.summary and include all values.
1 point
Your answer
When running a simulation, what does the line cwp 0.05 indicate?
1 point
Keep clusters that have a clusterwise pvalue less than 0.05
Keep clusters that have a clusterwise pvalue more than 0.05
What clusterwise pvalue should be used to see all the clusters?
1 point
Your answer
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