<div dir="ltr"><div>Thanks Makoto and Bethel<br><br>I used another criteria for order selection, the AIC, and obtained higher orders and better results in the validation of the models<br><br></div>Best wishes<br></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Mon, Mar 24, 2014 at 7:17 PM, Makoto Miyakoshi <span dir="ltr"><<a href="mailto:mmiyakoshi@ucsd.edu" target="_blank">mmiyakoshi@ucsd.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Dear Bethel and John,<div><br></div><div>I also often encounter this problem. It seems there is no guaranteed solution for this. I almost always use order == 30 with piecewise detrending on. Maybe you want to decrease the ICs to include (which could be against your experimental interest, I know...)</div>
<div><br></div><div>Should we contact Tim?</div><div><br></div><div>Makoto<br><div><br></div><div><br></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-03-19 15:35 GMT-07:00 Bethel Osuagwu <span dir="ltr"><<a href="mailto:b.osuagwu.1@research.gla.ac.uk" target="_blank">b.osuagwu.1@research.gla.ac.uk</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi<br>
What model order and window size are you using? You might need to give more details about your pre-processing steps including whether you are working with IC or sensors and the use of spatial filters. If your model order is too low for a given window size then your data will not be modeled properly and the residuals will not be white. So you might try using higher model orders but without over fitting.<br>
<br>
Bethel<br>
________________________________________<br>
From: <a href="mailto:eeglablist-bounces@sccn.ucsd.edu" target="_blank">eeglablist-bounces@sccn.ucsd.edu</a> [<a href="mailto:eeglablist-bounces@sccn.ucsd.edu" target="_blank">eeglablist-bounces@sccn.ucsd.edu</a>] On Behalf Of jfochoaster . [<a href="mailto:jfochoaster@gmail.com" target="_blank">jfochoaster@gmail.com</a>]<br>
Sent: 18 March 2014 03:30<br>
To: eeglablist<br>
Subject: [Eeglablist] Problems with the whiteness of the residuals<br>
<div><div><br>
eeglab experts,<br>
<br>
I am working with ECoG data in eeglab using the SIFT plugin. When I am validating the model I obtain good consistency, above the 90%, good model stabilty, 100% stable, but bad whiteness of the residuals, none of the windows are white<br>
<br>
What I can do with these results?<br>
<br>
My data are adquired with the subject in resting, 240 Hz of sampling frequency, 16 channels, around 80 epochs of 2 seconds<br>
<br>
I really appreciate any help you can provide<br>
<br>
Best,<span class="HOEnZb"><font color="#888888"><br>
--<br>
John Ochoa<br>
Docente de Bioingeniería<br>
Universidad de Antioquia<br>
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</font></span></blockquote></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><div><br></div>-- <br><div dir="ltr">Makoto Miyakoshi<br>Swartz Center for Computational Neuroscience<br>Institute for Neural Computation, University of California San Diego<br>
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</font></span></div>
</blockquote></div><br><br clear="all"><br>-- <br>John Ochoa<br>Docente de Bioingeniería<br>Universidad de Antioquia<br>
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