If you're just starting off for the first time,<div>please do yourself a favor and read the whole</div><div>ERP bible, not just the ten commandments.</div><div><br></div><div><div>hope this helps you a bit.</div><div><br>

</div><div>search your topic on google scholar.</div><div>read and depend on multiple </div><div>articles in high-level journals</div><div>by the experts on your topic.</div><div>This is a necessary step in designing any study</div>

<div>and making your research effective in possibly </div><div>contributing to current questions or problems.</div><div><br></div><div>searching p300 number of trials on Google Scholar gives: </div><div><br></div><div>Please read  the articles below closely...</div>

<div><font class="Apple-style-span" size="1"><br></font></div><div><font class="Apple-style-span" size="1"><span class="Apple-style-span" style="color:rgb(34,34,34);font-family:Arial,sans-serif;line-height:16px"><h3 class="gs_rt" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;font-weight:normal">

<a href="http://www.sciencedirect.com/science/article/pii/S016787609600743X" style="color:rgb(17,34,204);text-decoration:underline;outline-style:none;outline-width:initial;outline-color:initial">On the <b style="color:rgb(17,34,204)">number </b>of <b style="color:rgb(17,34,204)">trials </b>needed for <b style="color:rgb(17,34,204)">P300</b></a></h3>

<div class="gs_a" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;color:rgb(0,153,51)">

J Cohen, J Polich - International Journal of Psychophysiology, 1997 - Elsevier </div><div class="gs_a" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;color:rgb(0,153,51)">

<br></div></span><span class="Apple-style-span" style="color:rgb(34,34,34);font-family:Arial,sans-serif;line-height:16px"><h3 class="gs_rt" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;font-weight:normal">

<a href="http://www.sciencedirect.com/science/article/pii/s1388-2457(09)00518-5" style="color:rgb(17,34,204);text-decoration:underline">Event-related potentials in clinical research: guidelines for eliciting, recording, and quantifying mismatch negativity, P300, and N400</a></h3>

<div class="gs_a" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;color:rgb(0,153,51)">

CC Duncan, RJ Barry, JF Connolly, C Fischer… - Clinical …, 2009 - Elsevier</div></span></font></div><div><font class="Apple-style-span" size="1"><br></font></div><span class="Apple-style-span" style="color:rgb(34,34,34);font-family:Arial,sans-serif;line-height:16px"><font class="Apple-style-span" size="1"><h3 class="gs_rt" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;font-weight:normal">

<a href="http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8986.2010.01152.x/full" style="color:rgb(17,34,204);text-decoration:underline">On the <b style="color:rgb(17,34,204)">number </b>of <b style="color:rgb(17,34,204)">trials </b>needed for a stable feedback‐related negativity</a></h3>

<div class="gs_a" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;color:rgb(0,153,51)">

J Marco‐Pallares, D Cucurell, TF Münte… - …, 2011 - Wiley Online Library</div></font></span><br><div>Also please note that there is a movement in EEG/ERP research to explode the ERP,</div><div>and understand topics such as single-trial variability,</div>

<div>variability within subjects, and even more simply,</div><div>visualizing single-trial EEG via tools such as eeglab's erpimage.</div><div><br></div><div><br></div><div>last, if you want to test your EEG system,</div>

<div>I suggest you read Steve Luck's Chapter</div><div>on Setting up a Lab, and that you do </div><div>testing to check your hardware, connections,</div><div>stimulus timing, etc... </div><div>Good luck and let the list know</div>

<div>how things go!</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div><br>

</div><div><br></div><div><br><br><div class="gmail_quote"><br><blockquote class="gmail_quote" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">

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