[Eeglablist] (single trial analysis)

Gilbert Preston nihprestong at mail.nih.gov
Thu Jun 30 13:30:45 PDT 2005


Dear Anna;
The ³delta² 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 ³oddball² ERP, an additional
consideration might be to analyze only  temporoparietal channels.
Gilbert Preston, M.D.
Diplomate ABNP
Genes, Cognition, and Psychosis Program
Clinical Brain Disorders Branch
10 Center Drive Rm 4s235 MSC1379
NIH-NIMH
9000 Rockville Pike
Bethesda, MD 20892-1379
nih\prestong at mail.nih.gov






From: <ps901adr at gold.ac.uk>
Date: Thu, 30 Jun 2005 11:20:35 -0400
To: <eeglablist at sccn.ucsd.edu>
Subject: Re: [Eeglablist] (single trial analysis)



Hello all, 

I have an ERP dataset and am interested in the P300 response.  I now need
to proceed with a single trial analysis, firstly to identify whether the
P300 is/is not present in each trial and secondly to attain amplitude and
latency data for those trials showing a P300.  Also considering recent
suggestions that the delta response dominates the P300 response, can anyone
recommend a suitable procedure?

Any suggestions and/or advice will be greatly appreciated.

Thanks, 

Anna 






Anna Ramchurn 

Department of Psychology
Goldsmiths College 
University of London
London, SE14 6NW 
UK 

Tel: ++44 (0)20 7078 5129
Fax: ++44 (0)20 7919 7873
email: anna.ramchurn at gold.ac.uk




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