Abstract
ABSTRACTMobile and wearable devices based activity recognition systems utilize built-in sensors to identify the activities performed by users pervasively. However, most of these systems do not explicitly present the sensing process to users and are prone to uncertainty. The presence of uncertainty makes users feel confused about the behaviors of activity recognition systems, which may affect the confidence of users. Uncertainty visualization has become an interesting research topic purporting to help users better understand systems. In this paper, we present an uncertainty visualization to reveal the process of mobile and wearable devices based activity recognition systems. We conducted an experiment to evaluate the uncertainty visualization by using a particular simulated mobile and wearable devices based activity recognition application. The results showed that the uncertainty visualization was effective in helping users understand and trust the judgments and inferences of the activity recognition application. Based on the advice of participants, we concluded a few directions to improve the uncertainty visualization.
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