<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Stephen, Lisandro and David: </div><div><br></div><div>Many thanks for your prompt answers, you all have been very helpful!</div><div><br></div><div><br></div><div><br></div> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">De:</span></b> Stephen Politzer-Ahles <politzerahless@gmail.com><br> <b><span style="font-weight: bold;">Para:</span></b> Angel Tabullo <angeltabullo@yahoo.com> <br><b><span style="font-weight: bold;">CC:</span></b> "eeglablist@sccn.ucsd.edu" <eeglablist@sccn.ucsd.edu> <br> <b><span style="font-weight: bold;">Enviado:</span></b> Martes, 12 de junio, 2012 9:53
P.M.<br> <b><span style="font-weight: bold;">Asunto:</span></b> Re: [Eeglablist] choice of reference<br> </font> </div> <br><div id="yiv1444318792"><div>Hi Angel,</div><div> </div><div>Steve Luck's book <i>An Introduction to the Event-related potentials method </i>has a lot of information on references and the consequences of the reference you choose. A common issue with average reference is that it's best when you have a high-density cap with many channels, so it may not be a good reference to use with a 19-channel dataset. (I don't know if the amount of noise matters particularly for reference, but I don't have any experience myself using average reference--since I've only worked with low-density caps, I've never had a chance to use average reference).</div>
<div> </div><div>Best,</div><div>Steve<br><br></div><div class="yiv1444318792gmail_quote">On Tue, Jun 12, 2012 at 11:36 AM, Angel Tabullo <span dir="ltr"><<a rel="nofollow" ymailto="mailto:angeltabullo@yahoo.com" target="_blank" href="mailto:angeltabullo@yahoo.com">angeltabullo@yahoo.com</a>></span> wrote:<br>
<blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid;" class="yiv1444318792gmail_quote"><div><div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; ">
<div>Hello everyone! I wanted to ask if there's an advantage in using average reference over linked mastoids or earlobes when you are working with 19 channels and considerable levels of noise. Furthermore: can reference affect the SNR of an ERP? </div>
<div><br></div><div>Thanks again for your attention and patience.</div><span class="yiv1444318792HOEnZb"><font color="#888888"><div><br></div><div>Angel Tabullo</div></font></span></div></div><br>_______________________________________________<br>
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