<div dir="ltr">Dear Iman,<div><br></div><div><p class="MsoNormal">> ERP Time Freq is |F(mean(x))| <u></u><u></u></p><p class="MsoNormal">ERSP is mean(|F(x)|) </p></div><div class="gmail_extra"><br></div><div class="gmail_extra">
This is much easier to understand for me. They are not equivalent. Single trial phase-variable power modulation can not be observed with the former, correct?</div><div class="gmail_extra"><br></div><div class="gmail_extra">
Makoto<br><br><div class="gmail_quote">2014-03-05 1:01 GMT-08:00 Iman M.Rezazadeh <span dir="ltr"><<a href="mailto:irezazadeh@ucdavis.edu" target="_blank">irezazadeh@ucdavis.edu</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal">Hi all ,<u></u><u></u></p><p class="MsoNormal">ERP Time Freq is |F(mean(x))| <u></u><u></u></p><p class="MsoNormal">ERSP is mean(|F(x)|) <span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u><u></u></span></p>
<p class="MsoNormal"><a name="144917a0b7227f93__MailEndCompose"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></a></p><p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Best<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Iman<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif"> <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">mailto:eeglablist-bounces@sccn.ucsd.edu</a>] <b>On Behalf Of </b>Makoto Miyakoshi<br>
<b>Sent:</b> Thursday, February 27, 2014 10:48 PM<br><b>To:</b> Iman M.Rezazadeh<br><b>Cc:</b> EEGLAB List<br><b>Subject:</b> Re: [Eeglablist] ERPS vs Time-Freq<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p>
<div><p class="MsoNormal">Dear Iman,<u></u><u></u></p><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I'm not sure if there is any difference... I was not aware of it.<u></u><u></u></p></div>
<div><p class="MsoNormal">You may want to check dftfilt3() for the EEGLAB default wavelet (and let us know what you find).<u></u><u></u></p></div><div><p class="MsoNormal"><br>> And what is the difference btw evoked and induced potential.<br>
<br>Evoked is phase-reset to stimulus onset and induced is not. I thought Galambos proposed this distinction, but I could be wrong.<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal" style="margin-bottom:12pt">
Makoto<u></u><u></u></p><div><p class="MsoNormal">2014-02-27 16:35 GMT-08:00 Iman M.Rezazadeh <<a href="mailto:i_rezazadeh@yahoo.com" target="_blank">i_rezazadeh@yahoo.com</a>>:<u></u><u></u></p><blockquote style="border-style:none none none solid;border-left-color:rgb(204,204,204);border-left-width:1pt;padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<div><div><p class="MsoNormal">Hi , <u></u><u></u></p><p class="MsoNormal">What is the difference btw the traditional time-freq representation of an ERP and ERPS? Are they the same? Since Suppose, we have two epochs x1 and x2 with zero means , then <u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p><p>1-<span style="font-size:7pt"> </span>In traditional way : we make an average out of them x_avg and then make the Fourier transform of them F(x_avg)=F([x1+x2]/2 ) = F(x1/2)+F(x2/2)= [F(x1) + F(X2)] / 2<u></u><u></u></p>
<p>2-<span style="font-size:7pt"> </span>In ERPS we calculate time-freq for each epoch F(x1) and F(x2) and then make the average ERPS=[ Fx(1) + F(x2)] / 2 <u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">
<u></u><u></u></p><p class="MsoNormal">And what is the difference btw evoked and induced potential. My questions are mostly from Chp 3 of the Oxford Handbook of Event Related Potential Components pg 77-78<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Best<u></u><u></u></p><p class="MsoNormal"><span style="color:rgb(136,136,136)">Iman<u></u><u></u></span></p></div></div></blockquote></div><p class="MsoNormal">
<br><br clear="all"><u></u><u></u></p><div><p class="MsoNormal"><u></u> <u></u></p></div><p class="MsoNormal">-- <u></u><u></u></p><div><p class="MsoNormal">Makoto Miyakoshi<br>Swartz Center for Computational Neuroscience<br>
Institute for Neural Computation, University of California San Diego<u></u><u></u></p></div></div></div></div></div></blockquote></div><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></div>
</div></div>