[Eeglablist] p300 convention

[Alexander Lenhardt]

Hi Mehmet,

as far as i know the inversion has simply historical reasons. The pen of 
the "ancient" EEG amplifiers was deflected downwards for positive voltages.

Alex

Am 16.06.2011 05:29, schrieb mehmet ali:
> 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,
>
>
>
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