[Eeglablist] p300 convention

[Stephen Politzer-Ahles]

Hi Mehmet,

This is a common convention for all ERP research, not just P300 (although
it's not universally followed). If you have Steven Luck's book *An
Introduction to the Event-Related Potential Technique* (2004), he mentions
this on p. 10, saying that it might have been adopted from a convention
neurophysiologists used in plotting action potentials a hundred years or so
ago.

Since currently some people choose to plot negative up and some choose to
plot negative down, it's always a good idea to label your figures clearly
and indicate which direction is which.

Best,
Steve

On Thu, Jun 16, 2011 at 7:29 AM, mehmet ali <theretinaguy at gmail.com> wrote:

> Hi all,
>
> p300 is conventionally plotted on an inverted axis( positive potentials to
> down), is there a reason to end up with this convention?
>
> Best,
>
>
>
> _______________________________________________
> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
> To unsubscribe, send an empty email to
> eeglablist-unsubscribe at sccn.ucsd.edu
> For digest mode, send an email with the subject "set digest mime" to
> eeglablist-request at sccn.ucsd.edu
>



-- 
Stephen Politzer-Ahles
University of Kansas
Linguistics Department
http://www.linguistics.ku.edu/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20110616/8fe1807f/attachment.html>