P300 Speller flashing just letter, not columns neither rows

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gerardoacv
Posts: 3
Joined: 16 Apr 2011, 14:55

P300 Speller flashing just letter, not columns neither rows

Post by gerardoacv » 28 Oct 2013, 00:01

Hello. I want to try flashing single letters in matrix showed. Each stimulus would be a Letter flashing. How can i do that?

mellinger
Posts: 1056
Joined: 12 Feb 2003, 11:06

Re: P300 Speller flashing just letter, not columns neither r

Post by mellinger » 28 Oct 2013, 08:40

Hi,

you may just modify the LoadMenu() function such that each stimulus goes into its own Association object.
For more information about stimuli and associations, see the StimulusTask class documentation on the BCI2000 wiki.

Regards,
Juergen

gerardoacv
Posts: 3
Joined: 16 Apr 2011, 14:55

Re: P300 Speller flashing just letter, not columns neither r

Post by gerardoacv » 28 Oct 2013, 17:20

Thank you Juergen. Where i can find LoadMenu() function?

Best regards,

Gerardo

mellinger
Posts: 1056
Joined: 12 Feb 2003, 11:06

Re: P300 Speller flashing just letter, not columns neither r

Post by mellinger » 29 Oct 2013, 08:22

I was assuming you were asking how to modify the source code of the P3Speller task.
LoadMenu() is one of the functions in the P3SpellerTask class, which implements the P3Speller.

Without a modification to the source code, you cannot implement the flashing of individual matrix elements in the P3Speller.

Regards,
Juergen

gerardoacv
Posts: 3
Joined: 16 Apr 2011, 14:55

Re: P300 Speller flashing just letter, not columns neither r

Post by gerardoacv » 29 Oct 2013, 16:17

Thank you, with this information i think i can change the specific lines of code.

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