[VoxBo] fdr in vbstatmap and f-tests in rfx analysis

David January djanuary at sas.upenn.edu
Wed Nov 28 08:55:29 EST 2007


Hi everyone,

I have two questions.

1) I'm trying to generate a false discovery rate statmap using
vbstatmap for an rfx analysis.  At the command line, I'm entering the
following:
>vbstatmap <GLMdir> -o <outputfile> -c 1 -s tfdr
This yields the following error:
[E] vbstatmap: invalid scale tfdr.
What am I doing wrong?

2) For a different rfx analysis, I want to do an F test of the entire
model (of 3 covariates).  However, when I specify scale = f in my
vbprep script that generates the rfx .tes file, I get a uniform red
brain.  When I specify t as the scale, I get a standard statmap.  I'm
not mean norming the data; any ideas on what's going wrong in the
f-version?

-- 
David January
Department of Psychology
University of Pennsylvania


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