Degree of Freedom

[Meri]

Hi
Dear Xu
Thanks for the useful toolkit, xjView.
I was wonder would you mind explain what df means in xjView.

Thank You
Meri

[Xu Cui]

Meri,

df in xjview is exactly same with df in statistics. T-test image is always associate with a df, which is usually # subject - 1.

Xu

Meri

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Xu Cui, Ph.D. 崔旭 博士
Department of Psychiatry and Behavioral Sciences
Stanford University
Blog: http://www.alivelearn.net

Profile: http://www.peaya.com/p/?cuixu
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[Meri]

Thanks a lot for the guidance.
does it involve z-score images obtained from group analysis too? e.g
if an image resulted from group analysis of 4 subjects df should be 3
or 1?

Bests,
Meri

[Xu Cui]

df is not used for z-score.

Xu

New blog: 我的三次高考 http://www.alivelearn.net/?p=1389