[Eeglablist] Can I do coherence between independent components?

[Scott Makeig]

Zhang and all -

'Independent' components are actually (and practically) 
maximally-independent components. This leaves 'room' for occasional 
coherence to appear. If this occurs consistently at moments of interest 
-  this may be a result of interest. See our paper at
http://biology.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pbio.0020176
(and the linked animation) for an example. I am working on a paper 
reporting another example now.

Scott Makeig

Zhang Yan wrote:

>Hi, Dear All:
>
>I am recently working on ICA. One question confused me: could I do
>coherence analysis between independent components of EEG?
>
>Because ICA assume sources are mutually uncorrelated. So after ICA, the
>separated sources should be uncorrelated. However, some people used ICA
>and then did coherence analysis among components. What is the basic theory
>for doing that? Could you recommend some papers for their theory?
>
>Thank you very much.
>
>Rachel/
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