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<TITLE>Re: [Eeglablist] (single trial analysis)</TITLE>
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<FONT FACE="Arial"><SPAN STYLE='font-size:12.0px'>Dear Anna;<BR>
The “delta” response in the P300 ERP may be a reflection of eye movement artifact, especially when comparing a patient group with healthy participants. If this is the case with your recordings, one way to address it is with particularly stringent manual editing prior to EEGLAB analysis. If the paradigm is the auditory “oddball” ERP, an additional consideration might be to analyze only temporoparietal channels.<BR>
<FONT COLOR="#800000"><I>Gilbert Preston, M.D.<BR>
Diplomate ABNP<BR>
Genes, </I></FONT><I><FONT COLOR="#7F0000">Cognition, </FONT><FONT COLOR="#800000">and Psychosis Program<BR>
Clinical Brain Disorders Branch<BR>
10 Center Drive Rm 4s235 MSC1379<BR>
NIH-NIMH<BR>
9000 Rockville Pike<BR>
Bethesda, MD 20892-1379<BR>
<U>nih\prestong@mail.nih.gov<BR>
</U></FONT></I><FONT COLOR="#000080"><BR>
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<HR ALIGN=CENTER SIZE="3" WIDTH="95%"><B>From: </B><ps901adr@gold.ac.uk><BR>
<B>Date: </B>Thu, 30 Jun 2005 11:20:35 -0400<BR>
<B>To: </B><eeglablist@sccn.ucsd.edu><BR>
<B>Subject: </B>Re: [Eeglablist] (single trial analysis)<BR>
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Hello all, <BR>
<BR>
I have an ERP dataset and am interested in the P300 response. I now need <BR>
to proceed with a single trial analysis, firstly to identify whether the <BR>
P300 is/is not present in each trial and secondly to attain amplitude and <BR>
latency data for those trials showing a P300. Also considering recent <BR>
suggestions that the delta response dominates the P300 response, can anyone <BR>
recommend a suitable procedure? <BR>
<BR>
Any suggestions and/or advice will be greatly appreciated. <BR>
<BR>
Thanks, <BR>
<BR>
Anna <BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
Anna Ramchurn <BR>
<BR>
Department of Psychology <BR>
Goldsmiths College <BR>
University of London <BR>
London, SE14 6NW <BR>
UK <BR>
<BR>
Tel: ++44 (0)20 7078 5129 <BR>
Fax: ++44 (0)20 7919 7873 <BR>
email: anna.ramchurn@gold.ac.uk <BR>
<BR>
<BR>
<BR>
<BR>
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