Table 6.
The eight usability topics, participants' comments per usability, researcher observations, and expert-reported usability violations.
| Usability topics within the Telekit system | Researcher observation in TA2 | Participant comments in TA2 | Expert-reported usability in HE2 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P1 | P2 | P3 | P4 | P5 | Total | P1 | P2 | P3 | P4 | P5 | Total | E1 | E2 | E3 | E4 | E5 | Total | |
| Misc. | 4 | 1 | 2 | 0 | 1 | 8 | 3 | 6 | 0 | 2 | 2 | 13 | 9 | 7 | 15 | 4 | 7 | 42 |
| Read and watch films | 4 | 0 | 0 | 0 | 0 | 4 | 3 | 2 | 0 | 2 | 2 | 9 | 5 | 4 | 11 | 4 | 5 | 29 |
| Read and watch instructions | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 2 | 0 | 1 | 6 | 7 | 3 | 7 | 3 | 2 | 22 |
| Log in | 1 | 1 | 0 | 1 | 0 | 3 | 2 | 1 | 1 | 0 | 0 | 4 | 4 | 3 | 7 | 1 | 1 | 16 |
| Perform measurement | 6 | 3 | 1 | 0 | 2 | 12 | 5 | 5 | 7 | 6 | 2 | 25 | 15 | 16 | 26 | 15 | 5 | 77 |
| Write a message | 4 | 0 | 1 | 0 | 0 | 5 | 1 | 4 | 4 | 3 | 2 | 14 | 4 | 2 | 7 | 3 | 4 | 20 |
| View images | 3 | 0 | 1 | 1 | 1 | 6 | 2 | 0 | 0 | 0 | 1 | 3 | 1 | 3 | 5 | 2 | 6 | 17 |
| Log out | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
|
| ||||||||||||||||||
| Total | 24 | 5 | 5 | 2 | 4 | 40 | 18 | 19 | 15 | 14 | 10 | 76 | 45 | 38 | 78 | 32 | 30 | 223 |