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. Author manuscript; available in PMC: 2012 Jul 28.
Published in final edited form as: Neurorehabil Neural Repair. 2010 Oct 4;25(4):323–331. doi: 10.1177/1545968310382425

Figure 1.

Figure 1

The 6 × 6 matrix used in the current study: a row or column flashes for 100 ms every 175 ms. The letter in parentheses at the top of the window is the current target character “D.” A P300 should be elicited when the fourth column or first row is flashed. After 15 flash sequences (ie, each row and each column has been flashed 15 times), the collected brain responses are processed and classified, and online feedback is provided directly below the character to be copied. The process is then repeated for the next target character “I” and so forth until all characters in the word “DICE” have been presented as targets.