P300 Speller flashing just letter, not columns neither rows

[gerardoacv]

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

[mellinger]

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]

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

Best regards,

Gerardo

[mellinger]

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]

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