Dear all,
Actually this a topic has been posted by Stefan Teipel one year ago (038560: Eigenvariate SPM8: disagreement between statistical output and raw values?).
That is: I analyzed my FA maps from 2 groups (A and B) of subjects using a simple 2-sample t test. With a T contrast [1 -1], I got significant cluster. When plotting the peak voxel over scan/time (actually subject here), the graph looks Ok that Group A higher than Gruop B; however, when plotting the eigenvariate, I got opposite results, in which Group A are lower than group B.
I have searched through the email archive, no response to Stefan's question was found.
I wonder how how does this happen?
Qizhu Wu
Huaxi MR Research Cneter
West China Hospital of Sichuan Uni
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