. 2020 Sep 28;8(9):e20317. doi: 10.2196/20317

Table 5.

System usability scale and subjective perception in the voice-only reporting and voice-button reporting groups.

Score^a,b,c	Voice-only reporting group (n=30), mean (SD)	Voice-button reporting group (n=27), mean (SD)	P value
Overall score	83.80 (9.49)	80.44 (10.25)	.20
Usability score	83.58 (9.57)	81.57 (9.69)	.43
Learnability score	84.67 (14.56)	75.93 (20.24)	.06

^aQuestionnaires were presented in Chinese.

^bThe mean score of the system usability scale with adjective ratings were as follows: 35.7 (“poor”), 50.9 (“ok”), 71.4 (“good”), and 85.5 (“excellent”).

^cThe questionnaire’s Cronbach α for voice-only reporting (α=.77) and voice-button reporting (α=.78) exceeded .70, indicating good internal consistency and reliability.