Re: [Freesurfer] Restrict QDEC analysis to a region

you will have to run the correction for multiple comparisons with mri_glmfit-sim (ie, you can't do it in qdec). doug

On 03/17/2014 02:03 PM, amirhossein manzouri wrote:

Yes. Basically I want to see the effect of restricting the brain area on the group comparison clusters from Monte Carlo Simulation (threshold 1.3). As you mentioned before from mdi_glmfit I just get a masked version of whole brain analysis. How can I do the correction for multiple comparison with Monte Carlo (threshold 1.3) command based?

Best regards, Amirhossein Manzouri

On Mon, Mar 17, 2014 at 6:52 PM, Douglas N Greve <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> wrote:

I don't know what you mean. Can you elaborate?
doug

On 03/17/2014 01:19 PM, amirhossein manzouri wrote:

    Can I also use mri_surfcluster as it is in qdec since I want
    to compare the whole brain and masked brain results?

    Best regards,
    Amirhossein Manzouri




    On Fri, Mar 14, 2014 at 4:49 PM, Douglas N Greve
    <greve@nmr.mgh.harvard.edu <mailto:greve@nmr.mgh.harvard.edu>
    <mailto:greve@nmr.mgh.harvard.edu
    <mailto:greve@nmr.mgh.harvard.edu>>> wrote:


        you are doing it the right way. There is no difference in the
        uncorrected analysis. There will be a difference when you
    correct
        for multiple comparisons
        doug



        On 03/14/2014 11:15 AM, amirhossein manzouri wrote:

            Dear Experts,
            I have read the previous posts in the list regarding
            restricted ROI analysis. So I generated my label from
    tksurfer
            and used that for group difference analysis by adding
    --label
            to mri_glmfit, but the result (sig.mgh) seems just a
    masked
            version of the analysis including whole brain ( no
    difference
            in significance! ). I expected to see a different
    pattern of
            significance by limiting the region. Would you please
    advise
            if I am doing this in a right way?

            Best regards,
            Amirhossein Manzouri



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