Table 3.
Outcomes on SUS, CEQ and study-specific questionnaire for the optimized UI and the basic UI respectively.
| Variable | Optimized UI |
Basic UI |
Mean difference (95% CI) | p-Value | ||
|---|---|---|---|---|---|---|
| N | Mean (SD) | N | Mean (SD) | |||
| SUS | 186 | 65.32 (18.74) | 175 | 62.91 (20.02) | 2.41 (−1.61, 6.43) | 0.240 |
| CEQ | 186 | 26.43 (11.79) | 174 | 25.81 (12.19) | 0.62 (−1.87, 3.11) | 0.625 |
| Study-specific questionnaire | 186 | 173 | ||||
| Likable | 1.34 (0.83) | 1.39 (0.91) | −0.04 (−0.22, | 0.639 | ||
| Easy to understand | 2.08 (0.78) | 1.88 (0.82) | 0.14) | 0.021 | ||
| Relevant examples | 1.79 (0.78) | 1.69 (0.85) | 0.20 (0.03, 0.36) 0.10 (−0.07, 0.27) |
0.264 | ||
| Overwhelmed | 1.88 (0.87) | 1.64 (1.03) | 0.24 (0.04, 0.44) | 0.018 | ||
UI, user interface; CI, confidence interval; SD, standard deviation; SUS, System Usability Scale; CEQ, Credibility/Expectancy Questionnaire.