So it is only one volume? This won't work with mri_glmfit. glmfit needs
to have a value for each subject so that it can compute the variance
across subjects (needed to infer whether a difference from 0 is
significant). I don't know of any software that will do it.
doug
On 10/1/12 6:59 PM, Maryam Vaziri Pashkam wrote:
Hi Doug,
The output of the analysis is a volume with performance values in each
voxel. the performance ranges between 0 to 1 and I want to see if
across subjects there is any region with above chance performance
(Chance is 0.5).
Maryam
On Mon, Oct 1, 2012 at 6:10 PM, Douglas N Greve
<gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu>> wrote:
Hi Maryam, I must confess ignorance on search-light analysis. Can
you give me more background on what it is, the output data, and
what you want mri_glmfit to tell you?
doug
On 09/30/2012 09:46 PM, Maryam Vaziri Pashkam wrote:
Hi Dough,
I have run a searchlight analysis on 10 subjects and want to
run a random effects analysis with mri_glmfit across subject.
I have the results of each subject projected on the fsaverage
surface. But I have no idea how to make it to
1) compare the values in each voxel with 0.5 instead of 0
2) how to make it ignore the fact that I dont have variance
for each subject and only have a single performance value
(support vector machine performance) for each voxel (it looks
like the mri_glmfit needs a ces.var.nii)
Any idea how I can do this? Sorry if this is a rookie
question. I am totally new to searchlight and random effects
analysis in fsfast.
Thanks,
Maryam
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
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