<div dir="ltr">Dear Vivian,<div><br></div><div><div style="font-family:arial,sans-serif;font-size:14px">(1) Is there a good how-to document for deciding which components to reject based on the features of the ICA (e.g., distribution of activity over the scalp, time, trials, power spectrum, etc.)?</div>
<div style="font-family:arial,sans-serif;font-size:14px"><br></div><div style="font-family:arial,sans-serif;font-size:14px">Don't discard any IC by hand if you will use STUDY; it will automatically threshold your ICs based on 1. residual variance of 15% (by default) and 2. outside-brain IC rejections. Otherwise, you have to learn yourself which ICs are good in terms of scalp topography, spectra, ERP and ERP images, etc.</div>
<div style="font-family:arial,sans-serif;font-size:14px"><br></div><div style="font-family:arial,sans-serif;font-size:14px">(2) I have questions about 6 components (here's a <a href="https://www.dropbox.com/s/yikdd2fpfwx2ziu/forEEGLABlistserv.pdf" target="_blank">link</a> to a document with their graphs). Any thoughts about whether these components should be kept or rejected, and whym would be much appreciated!</div>
</div><div style="font-family:arial,sans-serif;font-size:14px"><br></div><div style="font-family:arial,sans-serif;font-size:14px">They are all good in term of ERP and ERP images, but interestingly bad in scalp topography patterns. Two suggestions. 1. Go back to continuous data and apply 1-Hz high-pass filter 2. Check channel locations again. Is it rotated by 90 degrees by any chance? Did you press 'optimize center' in the channel location edit window on the top right?</div>
<div style="font-family:arial,sans-serif;font-size:14px"><br></div><div style="font-family:arial,sans-serif;font-size:14px">Makoto</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-03-24 14:39 GMT-07:00 Vivian Zayas <span dir="ltr"><<a href="mailto:vz29@cornell.edu" target="_blank">vz29@cornell.edu</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Hi,
<div><br>
<div>I'm using ICA for artifact rejection and have questions about whether to keep or reject a few components. </div>
<div><br>
</div>
<div>(1) Is there a good how-to document for deciding which components to reject based on the features of the ICA (e.g., distribution of activity over the scalp, time, trials, power spectrum, etc.)?</div>
<div><br>
</div>
<div>(2) I have questions about 6 components (here's a <a href="https://www.dropbox.com/s/yikdd2fpfwx2ziu/forEEGLABlistserv.pdf" target="_blank">link</a> to a document with their graphs). Any thoughts about whether these components should be kept or rejected, and whym would
be much appreciated!</div>
<div><br>
</div>
<div>Best,</div>
<div>V</div>
</div>
<div>
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<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">___________________________</span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Vivian Zayas, Ph.D.</span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Associate Professor</span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Cornell University</span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Department of Psychology</span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">238 Uris Hall </span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Ithaca, NY 14853-7601 </span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Email: </span><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px"><a href="mailto:vz29@Cornell.edu" style="color:blue" target="_blank">vz29@Cornell.edu</a></span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Phone: <a href="tel:607-254-6332" value="+16072546332" target="_blank">607-254-6332</a></span></div>
<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Fax: <a href="tel:607-255-8433" value="+16072558433" target="_blank">607-255-8433</a></span></div>
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<div><span style="color:rgb(149,2,5);font-family:Verdana,sans-serif;font-size:12px">Faculty website: </span><span style="color:rgb(156,21,6);font-size:12px"><a href="http://comp9.psych.cornell.edu/people/Faculty/vz29.htm" target="_blank"><span style="color:rgb(0,0,238)">http://comp9.psych.cornell.edu/people/Faculty/vz29.htm</span></a></span></div>
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-- <br><div dir="ltr">Makoto Miyakoshi<br>Swartz Center for Computational Neuroscience<br>Institute for Neural Computation, University of California San Diego<br></div>
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