Hello,
I am conducting surface group analyses and would like to acquire exact p values.
The FreeSurfer manual notes that the number listed after the peak coordinates and the vertex # is a "significance value," and that the "significance in this display is a -log(10)p value, and not a straight p value."
However, if I log this number the "p value" I calculate is not significant (e.g., log(5.68) = .75) so I don't believe I am interpreting their description correctly.
Could you please advise on how to acquire exact p values?
Thank you for your time.
You need to compute p = 10^-5.68 = 2.0893e-06, which is significant :)
On 01/08/2018 02:04 PM, Hannah Claussenius-Kalman wrote:
Hello,
I am conducting surface group analyses and would like to acquire exact p values.
The FreeSurfer manual notes that the number listed after the peak coordinates and the vertex # is a "significance value," and that the "significance in this display is a -log(10)p value, and not a straight p value."
However, if I log this number the "p value" I calculate is not significant (e.g., log(5.68) = .75) so I don't believe I am interpreting their description correctly.
Could you please advise on how to acquire exact p values?
Thank you for your time.
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Douglas N Greve -
Hannah Claussenius-Kalman