The Scientific World Journal

Research Article

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

Table 2

Usability testing of the emergency alert device from the perspective of the users (n = 161).
Usability ± SDInterpretation
General appearances aspect4.11 ± 0.90Agree
(1) Weight of the device4.29 ± 0.76Agree
(2) Physical appearance such as size, dial, and type of wristband3.34 ± 0.71Neutral
(3) Material of the device4.16 ± 0.95Agree
(4) Position and size of the SOS button4.48 ± 0.84Agree
(5) Size of letters and symbols on the dial4.25 ± 0.87Agree
(6) Color and brightness of letters in contrast to the dial4.14 ± 0.84Agree
Usability aspect4.37 ± 0.83Agree
(1) Easy or convenient to wear4.24 ± 0.78Agree
(2) Easy or convenient to turn on or off4.11 ± 0.85Agree
(3) Easy or convenient to connect the device to a software application4.86 ± 0.51Strongly agree
(4) Easy to press the SOS button for sending a signal4.41 ± 0.75Agree
(5) Appropriate force to press the SOS button for sending a signal4.33 ± 0.89Agree
(6) Easy to charge the battery4.27 ± 0.94Agree
Overall aspect4.24 ± 0.88Agree