On 01/09/2014 08:00 AM, carina@van-vlodrop.de wrote:

Dear freesurfer community,

I'm trying to do my analysis in qdec right now with the question of differences of cortical-thickness between patient and control.

Instead I have a few questions about the different modulations in qdec:

In 'Design' it's possible to choose from different measurements. Are the options 'surface-based' and 'morphometric' the best ones for my question and what do 'volume-based' and 'functional' mean in this context?

Surface-based and morphometric are basically the same (and have to be selected together). Volume-based and functional have not been implemented yet and do nothing.

Is 10 the standard dimension of smoothing in qdec? How does the smoothing changes related to ROI's?

10 is the default and is usually what I use. This is somewhat arbitrary. There is no known way to select an optimal smoothing level. I don't understand your question about ROIs doug

I would be grateful for your comments.

Yours sincerely,

Carina

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