[Eeglablist] Imaginary Coherence values and interpretation

[M Abul Hassan]

Dear EEGLAB users 
I am using below formula to calculate imaginary coherence. The imaginary coherence values are very small (under 0.1) from the below formula.

coh=Pxy/sqrt(Pxx * Pyy)

iCoh=abs(imag(coh))

 

My questions are:
1-    Can we calculate imaginary coherence using EEGLAB without SIFT?
2-    Why imaginary coherence values are very small?
3-    How to interpret imaginary coherence results?
 
Thanks
Best Regards
Muhammad Abul Hasan
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