<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi EEGlablist,<br>
<br>
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? <br>
<br>
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?<br>
<br>
Looking forward to your insight.<br>
<br>
Best regards,<br>
<br>
Naeem.</td></tr></table>