A compensatory tracking task is a task that assesses eye–hand coordination, in which a user is operating a display that has an indicator and a zero point using a joystick, computer mouse, trackball, or other controlling device.
[1] Early versions of compensatory tracking tasks included a display made of a cathode ray oscilloscope with a rack and pinion connected to a knob that controlled the indicator.
Time, and distance from the zero point are measured to determine the participant's ability to control the indicator.
[1][2] Control modulators such as springs, generators, and electromagnets were used to increase difficulty of the task.
More recently, compensatory tracking tasks has been used to gauge alertness.