2020 年 4 巻 2 号 p. 2_95-2_102
Crime and violence cause a serious threat to residence life and property safety. This study focused on street robbery issues based on the criminal situation in Monterey, Mexico. A valuable conclusion in a previous survey revealed that the connection between family and individual could reduce the perception of fear. According to the findings, we proposed the design principles for security products against street robbery. This paper aims to verify whether the interaction modalities impact usability or perception. A wearable device was prototyped and test in a simulated robbery scenario. Three different interaction ways were compared to examine the users' evaluations of perception and usability. The results indicate that interaction modalities have an influence on functionality rather than the perception aspect. Moreover, as the widely acceptable interaction modalities, physical button and voice recognition was evaluated to be positive for usage intention and efficiency.