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Hi,
I have troubles with P3 spelling. Would anyone who has some ideas to fix up give me a comment please.

1) I've already done "User Tutorial: Obtaining P300 Parameters in a Calibration Session" and modified Linear Classifier matrix for subject’s parameter. Although there were no correct spelling online, P300GUI says that correct rate was all 100% after flash #4 by offline analysis. Why my P3 spelling doesn’t work well?

2) An .prm file I made by P300GUI couldn’t load to BCI2000. Please tell me how to import it?

Hi,

ad 1)
Configuring the LinearClassifier by hand will generally lead to less optimal results than optimizing it using the P300GUI application. Thus, it is well possible that the P300GUI application predicts much better performance than the actual online performance.

ad 2)
Please make sure to use the latest version of the P300GUI application. When you still experience problems, please report back.

HTH,
Juergen

Hi Juergen,
Thanks for your advice, I achieved P3spelling online with 30/32 collect answer. It’s 93.75% correctly! Thank you really.

2) I noticed that I've clicked a wrong button. I use BCI2000 ver.2. So I need click “.prm(v2)”, but I’ve clicked “.prm” at P300GUI when I made parameter file for LinearClassifier. Because of it, I couldn’t load .prm file to BCI2000.

1) When LinearClassifier is used, P300GUI is very convenient compared with OfflineAnalysis, I think. P300GUI has improved my P3spelling in dramatically.