Yes, but this is not providing any benefit for us then. There are cheaper ways (manual or automatic) to reject such bad epochs any ways.<div> <div>I wonder whether when we reject the bad ICs, it should/could/does back project to the ERP and corrects the corrupt activity as we expect.</div>
<div>For instance, compare FASTER or ADJUST algorithms, can't you do similar things via EEGLAB functions? I suppose you can. When you use ADJUST, the ERP activity is cleaned from the noise mapped by the ICs.</div><div>
<br></div><div>Baris<br><br><div class="gmail_quote">On Mon, Aug 15, 2011 at 5:09 PM, Maximilien Chaumon <span dir="ltr"><<a href="mailto:maximilien.chaumon@gmail.com">maximilien.chaumon@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hello all,<br><br>I'm currently cleaning data before working with components.<br><ul><li>I cut my dataset into epochs</li>
<li>reject epochs where signal is bad</li><li>run an ICA</li><li>find blink and muscle components, reject them</li>
<li>run an ICA again, and look at my components.</li></ul>... as I understood was suggested at the bottom of this page <a href="http://sccn.ucsd.edu/wiki/Chapter_01:_Rejecting_Artifacts" target="_blank">http://sccn.ucsd.edu/wiki/Chapter_01:_Rejecting_Artifacts</a><br>
<br>Then the ICs look very nice but come in pairs of extremely similar
topographies with different time courses, as shown on <a href="http://oszilla.hgs.hu-berlin.de/public/2ICAs.png" target="_blank">this picture</a>.<br>I am wondering what happened here. I can imagine that rejecting
components before running the second ICA is what went wrong... But why did I read that on the wiki?<br><br>Thanks a lot for any advice.<br>
Max<br>
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