P300 Classification Data Collection

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doug.davies
Posts: 12
Joined: 09 Jun 2011, 13:07

P300 Classification Data Collection

Post by doug.davies » 11 Jul 2011, 15:05

Hi all,

I am working on an application that works in the P300 Paradigm, but instead of selecting a single stimuli, I would like to generate a listing of the selection probabilities for each stimuli presented.

Can anyone provide me with some suggestions here?

The application is descended from StimulusPresentation, and currently in the OnClassResult function I am storing each value to which the state SelectedStimulus is set, and then using this as a data set. This only generates a few data points per run, though, and I am looking for a way to generate a more comprehensive data set.

Thanks,
Doug Davies

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

Re: P300 Classification Data Collection

Post by gschalk » 11 Jul 2011, 16:39

From what I understand, you want to have more classification results. You can configure BCI2000 to calculate a classification after each stimulus presentation, and not after presentation of n stimuli.

Just set NumERPsToAverage from 15 to 1.

Gerv

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