Hi Feng-Xian,

1,2. Not sure what you mean. We certainly compute the p from a t or an F and save all of the above. 3. Yes, we can display either individual subject maps of thickness (?h.thickness) or effects sizes after GLM analysis, or group means if you want.

cheers Bruce

On Mon, 22 Dec 2008, b9403208 wrote:

To Dear: I would make sure of the results of the group analysis.

1. The p-value, actually -10log(p), is only used in the qdec display.

That is to say, the value is used to display the difference of the two groups. 2. And Freesurfer doesnt use any statistical significance values, like, statistical p-value, T-value, z-score at present. 3. Freesurfer cant display the cortical thickness in unit, mm. So, I get the conclusion that Freesurfer couldnt quantify the cortical thickness at present.

Thank you in advance.

Feng-Xian

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