Table 3.
Results of the system usability scale (SUS)
| SUS-item | Question | N (valid) | Mean | SD |
|---|---|---|---|---|
| 1 | I think that I would like to use this system frequently | 7 | 3.85 | 0.9897 |
| 2 | I find the system unnecessarily complex | 7 | 1.71 | 0.4518 |
| 3 | I thought the system was easy to use | 7 | 3.71 | 0.4518 |
| 4 | I think that I need the support of a technical person to be able to use this system | 7 | 2.57 | 0.4949 |
| 5 | I found the various functions in this system were well integrated | 7 | 3.85 | 0.8330 |
| 6 | I thought there was too much inconsistency in this system | 7 | 2 | 0.5345 |
| 7 | I would imagine that most people would learn to use this system very quickly | 7 | 4.57 | 0.4949 |
| 8 | I found the system very cumbersome to use | 7 | 2 | 0 |
| 9 | I felt very confident using the system | 7 | 3.71 | 1.1606 |
| 10 | I needed to learn a lot of things before I could get going with this system | 7 | 2.14 | 0.8330 |
| Overall SUS score | 73.21 | |||
n = 7 participants, mean rating (5-point scale strongly disagree = 1; disagree = 2; neutral = 3; agree = 4; strongly agree = 5), standard deviations (SD) and overall SUS score