The values are -log10(p), so p < .01 would require a threshold of 2, etc. I don't use t, z, or F because I have not memorized the various tables that convert them to p:). The sig will map to any surface, including pial.

doug

Reschke, Cole wrote:

First, thanks to Doug for all his help up to this point.

Next, I have three questions. In my analysis, I used the -paired-diff and -osgm options in mris_preproc and mri_glmfit, respectively. I have successfully loaded sig.mgh onto the inflated surface.

Are the values from the color chart [-5,5] representative of a t-score or an F-score (t^2)?

I adjust the threshold by changing the 'Min' value in the 'Configure Overlay Display'?

Ex. If Min ==3, then p < 0.001 ?

Is the sig.mgh created solely for the inflated surface, or is it able to be uploaded on others (pial, wm, etc.)?

Thank you,

Cole

Cole Reschke

Data Manager, PET Center

Banner Alzheimer Institute

Banner Good Samaritan Medical Center

Phone: (602) 239-4868

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