Contributions:ANTTask

Synopsis

The main purpose of this task is to present sequential visual stimuli to the user of the BCI system. The subject will be shown an arrow on the screen pointing either to the left or to the right. On some trials, the arrow will be flanked by two arrows to the left and two arrows to the right. The subject's task is to respond to the direction of the CENTRAL arrow, press the left mouse button with the left thumb if the central arrow points to the left, or press the right mouse button with the right thumb if the central arrow points to the right.

In some trials, there will be asterisk cues indicating when or where the arrow will occur. If the cue is at the center or both above and below fixation it indicates that the arrow will appear shortly. If the cue is only above or below fixation it indicates both that the trial will occur shortly and where it will occur.

Timeline

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  Figure 1: ANT task timeline.