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Dear Steve,<br>
<br>
ICA methods may be fruitful for this when they are based on the
autocorrelation functions. Typical ICA functions of that type are
SOBI and TDSEP. ICA methods based on instantaneous statistics
(kurtosis: fastICA, JADE and COM2 or logistic functions: Infomax)
would be of little use in the context of slowly varying time courses
or rhythmic activity.<br>
<br>
Hope this helps,<br>
<br>
Ronald<br>
<br>
Le 23/02/2012 04:27, Stephen Politzer-Ahles a écrit :
<blockquote
cite="mid:CAJT2k_-o63xSCUYijVMzpU9-72xadAdLdxz1oXqvonLDM8R4sw@mail.gmail.com"
type="cite">Hello,<br>
<br>
I was wondering if anyone knows about (or could point me to
references about) whether it's feasible and valid to use ICA to
remove low-frequency artifact like skin potentials. I have a set
of recordings that has lots of problems with these, and while I've
found that a 0.5 Hz high-pass filter can attenuate them somewhat,
I'm also aware that high-pass filtering can have some big
consequences. In the past I have used ICA to remove EOG artifact
and I know of others who have used it for things like alpha,
heartbeat, and muscle-related artifacts, so I'm curious about
whether I can use it to remove skin potentials and what kinds of
distortions it might create. But before I do that I wanted to see
if others use it for that, or if it sounds crazy.<br>
<br>
Thank you,<br>
Steve Politzer-Ahles<br clear="all">
<br>
-- <br>
Stephen Politzer-Ahles<br>
University of Kansas<br>
Linguistics Department<br>
<a moz-do-not-send="true" href="http://www.linguistics.ku.edu/">http://www.linguistics.ku.edu/</a><br>
<br>
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