[Faster-eeg-list] Contaminated Channel Detection - Identifying removed channels

[Richard M. <ma...@ps...>]

Hello,

   Occasionally, our lab has to pop out a particular electrode that is
causing problems with getting stable impedance readings for the rest of the
electrodes on the cap.  I assumed FASTER's contaminated channel detection
algorithm would automatically identify these channels given that their
values would have very little variance and poorly correlate with
surrounding channels.  However, I've noticed for multiple subjects FASTER
will not identify these electrodes as dead despite the raw values being
abnormally constant (e.g., -258 +/- 4 microvolts throughout the duration of
recording) and poorly correlated with surrounding electrodes - in order to
interpolate these electrodes, I have to enter them in the 'known bad
channels' field.  Any idea why the algorithm isn't identifying these
removed electrodes as contaminated?

Thanks everyone!

-Ricky