<div dir="ltr"><div>I have done several studies running ICA on 0.1 Hz filtered data and got good ICA results. Do you clean your data prior to running ICA by removing epochs/segments with bad drift and idiosyncratic artifact? I've found this is important especially for relatively messy subjects.<br></div><div><br></div><div>Eric<br></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><span>-----<br>Eric Fields, Ph.D.<br>Postdoctoral Fellow<br><a href="https://www2.bc.edu/elizabeth-kensinger/" target="_blank">Cognitive and Affective Neuroscience Laboratory</a>, Boston College<br><a href="http://www.brandeis.edu/gutchess/" target="_blank">Aging, Culture, and Cognition Laboratory</a>, Brandeis University<br><a href="mailto:eric.fields@bc.edu" target="_blank">eric.fields@bc.edu</a></span></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On Mon, Jun 11, 2018 at 5:17 AM, Ahmad, Jumana <span dir="ltr"><<a href="mailto:jumana.ahmad@kcl.ac.uk" target="_blank">jumana.ahmad@kcl.ac.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Hi all,<u></u><u></u></p>
<p class="MsoNormal">I ran ICA with either a 0.1Hz or 1Hz filter. 0.1 does not give stable components- multiple blinks, and fuzzy looking brain maps.
<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">However, I wanted to avoid transferring the weights from 1Hz to 0.1, incase the 0.1Hz, which does not get fully characterised within the training, subsequently gets removed when we exclude eye blinks etc. Although this is fairly unlikely,
I did wonder if there would be an alternative to help my decomposition at 0.1Hz? Something that would also not distort the ERP.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I wondered about de-trending, but again, I am unsure how this would distort the ERP and I am not sure if this has been tested?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Best wishes,<u></u><u></u></p>
<p class="MsoNormal">Jumana <u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><b><span>------------------------------<wbr>------------</span></b><span style="font-family:"Helvetica",sans-serif"><u></u><u></u></span></p>
<p class="MsoNormal"><b><span>Jumana Ahmad<u></u><u></u></span></b></p>
<p class="MsoNormal"><span>Post-Doctoral Research Worker in Cognitive Neuroscience </span><span style="font-family:"Helvetica",sans-serif"><u></u><u></u></span></p>
<p class="MsoNormal"><span>EU-AIMS Longitudinal European Autism Project (LEAP)
<u></u><u></u></span></p>
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