Aren’t those the sort of values that you’d expect when looking at p-values?

--
Michael Harms, Ph.D.
-----------------------------------------------------------
Conte Center for the Neuroscience of Mental Disorders
Washington University School of Medicine
Department of Psychiatry, Box 8134
660 South Euclid Ave. Tel: 314-747-6173
St. Louis, MO  63110 Email: mha...@wustl.edu

From: 
<hcp-users-boun...@humanconnectome.org<mailto:hcp-users-boun...@humanconnectome.org>>
 on behalf of Timothy Hendrickson <hendr...@umn.edu<mailto:hendr...@umn.edu>>
Date: Wednesday, December 7, 2016 at 2:54 PM
To: "hcp-users@humanconnectome.org<mailto:hcp-users@humanconnectome.org>" 
<HCP-Users@humanconnectome.org<mailto:HCP-Users@humanconnectome.org>>
Subject: [HCP-Users] Myelin Group Analysis with PALM

HCP users/experts,

I am working on performing a group difference analysis with the per vertex 
myelin maps.
I believe that I have followed the how-to document on the PALM wiki correctly 
in order to separate the dscalar.nii myelin map into L and R .func.gii files, 
and to to perform TFCE permutation analysis.

Once my PALM analysis completes I have files that are corrected at a family 
wise error rate (FWER) of p <0.05, which is what I expect.

Anyway what I am now encountering is an issue with visualization. What I am 
getting are large clusters with a variety of colors and values at each vertex.
The per vertex values in each FWER corrected file do not make sense to me.

Prior to the PALM permutation analysis my value ranges group averaged myelin 
maps are as follows: right hemisphere - ~1.7-3.1; left hemisphere - ~1.5-2.6

Where as following PALM my values ranges are: right hemisphere - ~0.00 -0.52; 
left hemisphere - ~0.00-0.70.

I've attached a screen shot of the visualization.

-Tim




Timothy Hendrickson
Department of Psychiatry
University of Minnesota
Office: 612-624-6441
Mobile: 507-259-3434 (texts okay)

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