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. Author manuscript; available in PMC: 2021 Jul 24.
Published in final edited form as: J Neural Eng. 2020 Jul 24;17(4):046018. doi: 10.1088/1741-2552/ab9064

FIG. 2. BCI task and performance.

FIG. 2.

(A) Schematic of the BCI task. First the target, a grey bar in the upper or lower portion of the screen, was displayed for 1 s. Next, the subjects have a 3 s feedback period, where the vertical position of the cursor is determined by their neural activity while it moves horizontally at a fixed velocity. This portion corresponds to the analysis window, indicated with a grey bar in the figure. The result is then displayed for 1 s. If the subject reached the target, it will turn yellow; otherwise it will remain grey. There is a 1 s intertrial interval (ITI) between trials where nothing is displayed on the screen. This sequence is repeated 32 times per run, with 6 runs per session. (B) Each subject’s average performance across four days within two weeks. BCI Score is the percentage of correct trials during that session.