Greetings!<br><br>I was wondering if anyone could weigh in on some (as far as I can tell) outstanding issues in how to optimally deal with removed channels before ICA.<br><br>The remaining question seems to me to be this: is it superior to A) interpolate the removed channels, run PCA to appropriately reduce the dimensionality of the data, and then run ICA, or B) simply leave the electrodes out and interpolate after running ICA.<br>
<br>With the fact in mind that both the interpolation and the PCA introduce non-linearities into the data, is it the case that the addition of the new "clean" interpolated channels provides additional data deriving from neural sources for the ICA to work with, or does the fact that it's just a combination of data from other electrodes negate this possibility? The negative to the interpolation/PCA approach is clear, and may not be very substantial, but is there evidence for any positive at all?<br clear="all">
<br>-- <br>_________________________________________________________________<br>Matthew Stief<br>Human Development | Sex & Gender Lab | Cornell University<br><a href="http://www.human.cornell.edu/HD/sexgender" target="_blank">http://www.human.cornell.edu/HD/sexgender</a><br>
<br><br>Heterosexuality isn't normal, it's just common.<br>-Dorothy Parker<br>