Accuracy measures for evaluating computer pointing devices
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
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Motivation -- Development of new devices for the human-computer interaction allows more efficiency. The aim of this study is to determine in light of motor control theories, what condition of use of digitizing tablet technology is the most efficient for Air Traffic Control (ATC). Research approach -- 24 participants were instructed to perform aiming movements, as fast and accurate as possible in three distinct conditions. The pointing movements had been carried out either directly on the tablet, or through a video screen capable of displaying the feedback of the hand, or through a video screen without the feedback of the arm. Findings/Design -- The data reveal that pointing movements through a video display seems to be usable only if feedback of the location of the arm is displayed. With this feedback, the error rate is similar to pointing movements carried out directly on a tablet. However, the movement time is doubled. Originality/Value -- This experiment takes dimensions of motor behaviour into account in order to explain performance differences between devices. Take away message -- Informational constraints on planning and controlling aiming movements could be used to predict and understand the differences between pointing devices in human-computer interaction.