P300 accuracy

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paolobernardis
Posts: 40
Joined: 02 Jul 2010, 04:51

P300 accuracy

Post by paolobernardis » 30 Jan 2012, 04:23

Hello,
I am using P3Speller application. I would like to calculate system performance (i.e. accuracy in %) and system communication speed (i.e. transfer bit rate in bit/min) of the analyzer (perf =(1-etot)x100) (Wolpaw et al., 2002). For this I need to know:
-numbers of correctly classified non-target data epochs per session;
- numbers of correctly classified target data epochs per session.
Where can I find this information for sessions already conducted.
Thank you for your help.

gschalk
Posts: 615
Joined: 28 Jan 2003, 12:37

Re: P300 accuracy

Post by gschalk » 30 Jan 2012, 07:59

For this, you need number of correctly classified characters vs. number of incorrectly classified characters.

Which character was classified is stored in BCI2000 states. Please see

http://www.bci2000.org/wiki/index.php/U ... pellerTask


Gerv

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