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. Author manuscript; available in PMC: 2009 Oct 5.
Published in final edited form as: J Neural Eng. 2008 Mar 5;5(2):101–110. doi: 10.1088/1741-2560/5/2/001

Figure 1.

Figure 1

Sequence of events during a trial. A: Four targets are presented simultaneously on the screen. The red target is correct and the green targets are not. B: One sec later, the cursor appears on the screen and starts to move under EEG control. C: The cursor approaches a target. D: When the cursor hits a target, the target turns blue and the other targets disappear. This indicates the start of the 1.5-sec selection phase. E: If the target is selected, it turns yellow for one sec. If the target is not selected, it disappears and the screen is blank for one sec. F: A one-sec intertrial interval precedes the next trial.