Dear Inga,
On Fri, 3 Jan 2020 12:31:25 +0000, Inga D. <[log in to unmask]> wrote:
>Dear SPM team,
>
>I am currently working on analyzing full factorial models for GM volumes, cortical thickness, gyrification, fractal dimension and sulcus depth in CAT12 for a 3-groups comparison analysis as part of my master thesis.
>
>For the ROI analysis, I would like to extract the ROI data for further analyses in SPSS, but I am unsure about the interpretration of the ROI values. It says in the manual that "mean values inside the ROIs" are being extracted. Would you kindly explain to me, what this mean value describes for the different measures GMV, CT, GI, FD and SD (or what is being averaged in this case)? As far as I understand, this value is extracted for every ROI in every subject. Is that correct?
Yes, it's the mean raw (not normalized or smoothed) value inside this ROI for every subject.
You can also use the ROI analysis in CAT12 that is using the same GLM model (also with potential nuisance parameters) as used for the vertex-wise analysis.
Best,
Christian
>
>Thank you!
>
>Kind regards,
>
>Inga D.
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