[Eeglablist] Joint ICA in social interaction paradigm

[muhammad naeem]

Hi EEGlablist,



In an EEG paradigm concerning two-person social interaction I am trying a
 joint ICA approach (e.g: Calhoun and colleagues-NeuroImage 45 (2009) 
S163–S172 and computational Intelligence and Neuroscience 
doi:10.1155/2011/129365 ). A similar approach has been used in other 
studies (e.g Montague and colleagues- NeuroImage 16, 1159–1164 
(2002)doi:10.1006/nimg.2002.1150). Essential difference between two is 
the arrangement of Data. In the first, virtual channels have been 
created (separate sphering process and PCA ) whereas in the second data of two subjects were concatenated 
giving lesser (half  ) IC's to investigate. I am wondering which 
approach is more appropriate and why? 



A subsequent question is regarding data reduction- PCA is usually used 
but as mentioned in the first references may not be suitable for the 
activities which are not time/phase-locked(as the case with my data). 
What are the other options?



Looking forward to your insight.



Best regards,



Naeem.
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