Development and Usability Testing of an Emergency Alert Device for Elderly People and People with Disabilities

Table 1

Summary of perspectives from the specialists on the prototype of the emergency alert device.

Usability	Advantages	Suggestions for improvement
General appearance aspect	(i) Light weight; (ii) Made from suitable materials; (iii) Appropriate position and size of the SOS button	(i) Decrease the size of the dial; (ii) Decrease the thickness of the device; (iii) Increase the letter display; (iv) Use symbols; (v) Use color of letters or symbols in contrast to the base of the dial; (vi) Be aware of a fashionable design to enable a comfortable feeling when wearing outside the home
Usability aspect	(i) Easy and convenient to turn on or off; (ii) Appropriate force used to press the SOS button	(i) Be aware of using one hand; (ii) Be aware of the elderly and disabled people with cognitive problems setting up a software application, connecting to the Internet, and charging a battery; (iii) Create alternative ways of sending emergency signals such as voice recognition, short speech command, and light touch