Healthcare technologies are slowly entering into our daily lives, replacing old devices and techniques with newer intelligent ones.\nAlthough they are meant to help people, the reaction and willingness to use such new devices by the people can be unexpected,\nespecially among the elderly.We conducted a usability study of a fall monitoring system in a long-termnursing home. The subjects\nwere the elderly with advanced Alzheimer�s disease.The study presented here highlights some of the challenges faced in the use of\nwearable devices and the lessons learned. The results gave us useful insights, leading to ergonomics and aesthetics modifications\nto our wearable systems that significantly improved their usability and acceptance. New evaluating metrics were designed for the\nperformance evaluation of usability and acceptability.
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