Comparing to zero
sanja at UNM.EDU
Thu Jun 23 18:16:20 CEST 2005
Hi Dr. Holroyd,
I have a related question to your suggestion about using
afni to do the group analysis. Presumably afni is capable
to read CTF .mri and .svl files, but when I open afni from
a directory full of .mri files, I get a bunch of error
messages like ** THD_open_ctfmri(path/filename.mri): bad
version string. Have you ever encountered this problem?
Our CTF mri version, according to mrihead filename.mri, is
CTF_MRI_FORMAT VER 4.0. Could this be a reason for the
error messages I am getting?
Thank you in advance,
MIND Imaging Center
Albuquerque, New Mexico, USA
Phone: +1 (505) 272 3327
Fax: +1 (505) 272 4056
On Thu, 23 Jun 2005 10:22:57 -0400
Tom Holroyd <tomh at KURAGE.NIMH.NIH.GOV> wrote:
> Tom Holroyd wrote:
>>> What would be the best way to find clusters that are
>>> different from zero?
>> One way is to to a group analysis using AFNI. I'm using
>> coherences---here's a snippet.
> Just a brief followup. You can also do a within-subject
>analysis using AFNI by writing out each trial as a
>separate subbrik and doing a repeated-measures 3dANOVA or
>3dttest. Then you don't need to be in Talairach space.
> Dr. Tom Holroyd
> "A man of genius makes no mistakes. His errors are
> are the portals of discovery." -- James Joyce
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