<div dir="ltr">Dear Iman,<div><br></div><div>I'm not sure if there is any difference... I was not aware of it.</div><div>You may want to check dftfilt3() for the EEGLAB default wavelet (and let us know what you find).</div>
<div class="gmail_extra"><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.</div>
<div class="gmail_extra"><br></div><div class="gmail_extra">Makoto<br><br><div class="gmail_quote">2014-02-27 16:35 GMT-08:00 Iman M.Rezazadeh <span dir="ltr"><<a href="mailto:i_rezazadeh@yahoo.com" target="_blank">i_rezazadeh@yahoo.com</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="#0563C1" vlink="#954F72"><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 class="MsoNormal"> <u></u><u></u></p><p><u></u><span>1-<span style="font-style:normal;font-variant:normal;font-weight:normal;font-size:7pt;line-height:normal;font-family:'Times New Roman'"> </span></span><u></u><span dir="LTR"></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><u></u><span>2-<span style="font-style:normal;font-variant:normal;font-weight:normal;font-size:7pt;line-height:normal;font-family:'Times New Roman'"> </span></span><u></u><span dir="LTR"></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<span class=""><font color="#888888"><u></u><u></u></font></span></p><span class=""><font color="#888888"><p class="MsoNormal">Iman<u></u><u></u></p></font></span></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>
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