[Eeglablist] Interpolating bad channels while avoiding PCA before ICA

[Mikołaj Magnuski]

Dear EEGLab community,

Given that PCA is not recommended before ICA,
how to avoid it while still interpolating bad channels?

My initial analysis of the data is in channel space
so I would like to have all channels for all participants.
Therefore I want to interpolate bad channels (I have a
maximum of 4 bad channels out of 64 per subject).
This causes the rank of the data to decrease and compli-
cates using ICA for artifactual components removal.

Do you think a following way of avoiding PCA before ICA is ok?
1. preprocess the data before ICA
2. perform ICA and remove artifactual components
3. interpolate channels

So, in short: is it valid to interpolate channels only after
removal of artifactual ICs?

Mikolaj M
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20130520/a36fe8e1/attachment.html>