Abstract
This paper shows experimental results of the effects of the aiding information on the operator's control behavior of a seesaw-roller system, in which lhe roller can move on the seesaw based on the control input of seesaw tilting. The operator generates the control input by using a joystick device. The results reveal how human control performs in terms of action against control error, being compared with computer control. The experiment then shows that the aiding information improves the settling time, which was defined as the necessary period to make the roller move to a specified position.