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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You might also find the following paper helpful: ‘</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#333333;font-weight:normal">Towards a Unified Understanding
of Event-Related Changes in the EEG: The Firefly Model of Synchronization through Cross-Frequency Phase Modulation’ PLOS One (2012) at:
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0045630">http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0045630</a><o:p></o:p></span></h1>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Adrian Burgess,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Professor of Psychology,</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">School of Life & Health Sciences,</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Aston University,</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Birmingham B4 7ET</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">0121 204 4054</span><span style="color:#1F497D"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> eeglablist-bounces@sccn.ucsd.edu [mailto:eeglablist-bounces@sccn.ucsd.edu]
<b>On Behalf Of </b>Iman M.Rezazadeh<br>
<b>Sent:</b> 02 March 2014 08:59<br>
<b>To:</b> mmiyakoshi@ucsd.edu; 'Iman M.Rezazadeh'<br>
<b>Cc:</b> 'EEGLAB List'<br>
<b>Subject:</b> Re: [Eeglablist] ERPS vs Time-Freq<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi,
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It is informative site which discusses about Evoked vs Induced ERP.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://personalpages.manchester.ac.uk/staff/Wael.El-deredy/erbd/">http://personalpages.manchester.ac.uk/staff/Wael.El-deredy/erbd/</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">-Iman<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"></a><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
<a href="mailto:eeglablist-bounces@sccn.ucsd.edu">eeglablist-bounces@sccn.ucsd.edu</a> [<a href="mailto:eeglablist-bounces@sccn.ucsd.edu">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<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Dear Iman,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">I'm not sure if there is any difference... I was not aware of it.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">You may want to check dftfilt3() for the EEGLAB default wavelet (and let us know what you find).<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><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.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US">Makoto<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">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>>:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Hi ,
<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">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 <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p><span lang="EN-US">1-</span><span lang="EN-US" style="font-size:7.0pt"> </span>
<span lang="EN-US">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<o:p></o:p></span></p>
<p><span lang="EN-US">2-</span><span lang="EN-US" style="font-size:7.0pt"> </span>
<span lang="EN-US">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
<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">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<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Best<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#888888">Iman<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><br>
<br clear="all">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">-- <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Makoto Miyakoshi<br>
Swartz Center for Computational Neuroscience<br>
Institute for Neural Computation, University of California San Diego<o:p></o:p></span></p>
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