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Mar 24, 2017 07:03 PM | maktomak
Cluster and voxel level correction of PPI
Dear Experts,
I have conducted a PPI analysis and I have a spm_T image as result for each subject.
I have also performed first and second level analysis (one sample and two-sample t-tests).
I want to correct my results before visualization at cluster and voxel level (correction for multiple testing)
Is there any toolbox/software available for multiple testing correction? (eg. non-parametric, permutations etc)
Thank you
I have conducted a PPI analysis and I have a spm_T image as result for each subject.
I have also performed first and second level analysis (one sample and two-sample t-tests).
I want to correct my results before visualization at cluster and voxel level (correction for multiple testing)
Is there any toolbox/software available for multiple testing correction? (eg. non-parametric, permutations etc)
Thank you
Apr 13, 2017 01:04 AM | Donald McLaren
RE: Cluster and voxel level correction of PPI
A gPPI/PPI Analysis has the same second-level analysis as
activation analyses.
(1) Get the 1st level con_ images;
(2) Compute 1-sample/2-sample t-tests on the con_ images across subjects;
(3) Threshold the results.
The correction options are the same as activation studies. In SPM, you have cluster FDR, topological FDR, or using the cluster extent as determined by 3dClustSim from AFNI.
(1) Get the 1st level con_ images;
(2) Compute 1-sample/2-sample t-tests on the con_ images across subjects;
(3) Threshold the results.
The correction options are the same as activation studies. In SPM, you have cluster FDR, topological FDR, or using the cluster extent as determined by 3dClustSim from AFNI.