Once you click Start, you will see a red square flash, indicating that you should click, press the button, or initiate movement to otherwise indicate you have detected the presence of the target. Please HOLD the indicated state (clicked, moved, or pressed) of the controller while the red target is on the screen. If the target appears LEFT then, according to your controller: Left-click, Left-arrow or move-left. For the RIGHT target, according to controller: Right-click, Right-arrow, or move-right. We will also measure how quickly you RELEASE the target, once it disappears; for this, release the clicked or held mouse/button, or move back toward the center.
We are measuring how quickly you can react, and also how quickly you can "release." This is particularly important for myoelectric interfaces, since we anticipate a difference in responsiveness when it comes to individual motor unit recruitment thresholds vs. de-recruitment thresholds.
