Table 4.
Results of SUS questionnaire (mean, standard deviation, minimum and maximum).
| Adults | Children | |||||||
|---|---|---|---|---|---|---|---|---|
| Questions | mean | s.d. | min | max | mean | s.d. | min | max |
| 1. I think that I would like to use this system frequently | 3.28 | 0.57 | 2 | 4 | 3.78 | 0.45 | 2 | 4 |
| 2. I found the system unnecessarily complex | 1.19 | 0.73 | 0 | 2 | 0.55 | 0.71 | 0 | 2 |
| 3. I thought the system was easy to use | 3.59 | 0.55 | 2 | 4 | 3.78 | 0.49 | 2 | 4 |
| 4. I think that I would need the support of a technical person to be able to use this system | 0.41 | 0.55 | 0 | 2 | 0.38 | 0.59 | 0 | 2 |
| 5. I found the various functions in this system were well integrated | 3.22 | 0.48 | 2 | 4 | 3.82 | 0.39 | 3 | 4 |
| 6. I thought there was too much inconsistency in this system | 0.69 | 0.81 | 0 | 2 | 0.55 | 0.60 | 0 | 2 |
| 7. I would imagine that the most people would learn to use this system very quickly | 3.72 | 0.80 | 1 | 4 | 3.75 | 0.44 | 3 | 4 |
| 8. I found the system very cumbersome to use | 0.69 | 0.58 | 0 | 2 | 0.49 | 0.68 | 0 | 2 |
| 9. I felt very confident using the system | 3.38 | 0.60 | 2 | 4 | 3.65 | 0.55 | 2 | 4 |
| 10. I needed to learn a lot of things before I could get going with this system | 0.25 | 0.43 | 0 | 1 | 0.33 | 0.47 | 0 | 1 |
| SUS score | 84.92 | 11.48 | 52.50 | 100.00 | 91.23 | 11.05 | 65.00 | 100.00 |