Hi Anatasia,
According to the original TFCE paper,
TFCE incorporates the cluster information across a range of possible cluster-forming thresholds,
which makes it difficult, especially on the TBSS skeleton, to compare the results with clusters formed after thresholding the T-stat map.
Could you please upload the data in order for us to take a look at it?
Cheers

On Tue, Jul 7, 2009 at 2:59 PM, Anastasia A Ford <[log in to unmask]> wrote:

Hello,

I am working on TBSS/VBM comparison and was wondering whether there are any
cases where TFCE correction could fail. Examining our raw t-stat images for
both TBSS and VBM analysis, we note t-values of 5 and above distributed in
clusters that do support our hypothesis. However, once TFCE is performed, no
group differences survive the correction. Is there a reason why this might
be happening?

Sincerely,

Anastasia

--
G. Salimi-Khorshidi,
D.Phil. Student, Dept. of Clinical Neurology, University of Oxford.
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FMRIB Centre, John Radcliffe Hospital,
Headington, Oxford, OX3 9DU
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