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Kevin Spencer kspencer at s.psych.uiuc.edu
Thu Sep 25 10:34:20 EST 1997

rcb5 at classic.msn.com ("Ronald Blue") writes:

>From: 	Gaudet Normand
>Sent: 	Wednesday, September 24, 1997 8:57 PM
>To: 	neur-sci at net.bio.net
>Subject: 	ERPs

>>I'm a M. Sc. Neuropsychology student.
>>My research will focus on a characteristic found in music and word
>>Technically, I use E.R.P. (Event Related Potential).  
>>I would like to have more information on the N400 component (the one >that
>>behaves negatively and approximatively 400ms after the stimulus).
>>I scanned Current Contents and had few hints.
>>Help would be highly appreciated.
>>Normand Gaudet
>Calculate the average ERP while habituating the stimulus if
>possible.  Now turn the average over as a mirror image.

You mean habituating the subject to the stimulus, right?

How do you mean to turn the average over -- flip its polarity, or
switch the time axis?

>Now compare the results to your negatively ERP.  

negatively ERP?

>Notice anything unusual?  If they look similar then
>read COP theory at http://www.enticypress.com

Yeah, one looks like a mirror image of the other.  Nothing
profound there.

Kevin Spencer
Cognitive Psychophysiology Laboratory
Dept. of Psychology and Beckman Institute
University of Illinois at Urbana-Champaign
kspencer at s.psych.uiuc.edu

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