Adaptive tracker
The adaptive tracking test was performed using customised equipment and software (based on TrackerUSB hard-/software (Hobbs, 2004, Hertfordshire, UK)). This 3.5-minute period is including a run-in time of 0.5 minute, in this run-in time the data is not recorded. Adaptive tracking is a pursuit-tracking task. A circle moves randomly about a screen. The subject must try to keep a dot inside the moving circle by operating a joystick. If this effort is successful, the speed of the moving circle increases. Conversely, the velocity is reduced if the test subject cannot maintain the dot inside the circle. The average performance and the standard deviation of scores over 3.5 minutes will be used for analysis. The adaptive tracking test has proved sensitive for measurement of CNS effects of alcohol [