To begin, click on the "START" button located on the jeep. You will be given a block of twenty trials. Your task is to respond as quickly as you can to the appearance of a target in the desert scene. Respond to a target by depressing the "OPTION" key. If you are within the allowable time, you score. Once you have finished your first block of twenty trials, the task will be made more difficult. Click on the START button for your second and third blocks of trials. The fourth time you click on the START button your scores will be averaged and compared to those of other players.
