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Hi,all: I have several problems about the qdec in freesurfer 5.0. Firstly,can somebody explain the function of the buttons in the qdec's third step (display),such as Set using FDR in the False Discovery Rate ,Monte Carlo Null-Z simulation.If I just let these buttons as the default ,is it right ?
FDR is a way to set the voxel-wise threshold to control the False Discovery Rate. See the Genovese 2002 NI paper. Monte-Carol Null-Z how we implement cluster-based correction for multiple comparisons.
Secondly, what does the "MAX" and "VtxMAX" and "NVtxs"mean just as follows,which is output from the teminal.
VtxMax is the vertex where the maximum significance occurred in that cluster. Max is the significance (-log10(p)) at the max.
Generating cluster stats using min threshold of 2... Found 5 clusters Contrast: 'rh-Diff-Yes-No-Intercept-thickness', 10fwhm, DOF: 21 ClusterNo Max VtxMax Size(mm2) TalX TalY TalZ NVtxs Annotation
1 -3.4159 8928 51.50 31.9 -34.9 46.8 146 postcentral 2 -2.6111 120796 42.30 30.5 -6.5 -32.9 79 entorhinal 3 -2.5302 122287 22.28 35.4 -68.1 43.1 41 inferiorparietal 4 2.3762 145773 21.24 40.3 22.6 20.6 46 parsopercularis 5 2.1491 24852 19.94 4.8 -40.1 71.5 55 paracentral ============================================================
Thanks, Wang
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