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. Author manuscript; available in PMC: 2009 Jan 15.
Published in final edited form as: J Neurosci Methods. 2007 Aug 1;167(1):15–21. doi: 10.1016/j.jneumeth.2007.07.017

Fig. 1.

Fig. 1

The 6×6 matrix used in the current study. A row or column intensifies for 100 ms every 175 ms. The letter in parentheses at the top of the window is the current target letter “D.” A P300 should be elicited when the fourth column or first row is intensified. After the intensification sequence for a character epoch, the result is classified and online feedback is provided directly below the character to be copied.