Clusterwise Correction for Multiple Comparisons (Permutation)
This quiz relates to the content in the FreeSurfer tutorial titled Clusterwise Correction for Multiple Comparisons (
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_glmfit-sim
3. Correct for multiple comparisons
Are you in the FreeSurfer course?
Where is the information for the simulation stored?
Cluster Simulation Data (CSD) file
P is the probability of seeing a maximum cluster that size or larger during a simulation
What command should be run to get the initial analysis to get uncorrected results?
Only include the name of the command without any flags.
From the example in the tutorial, what is the cluster-wise p-value for cluster #21?
Hint: A summary of the clusters is available in perm.th40.abs.sig.cluster.summary and include all values.
When running a simulation, what does the line cwp 0.05 indicate?
Keep clusters that have a cluster-wise p-value less than 0.05
Keep clusters that have a cluster-wise p-value more than 0.05
What cluster-wise p-value should be used to see all the clusters?
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