Research Article
An Iterative, Mixed Usability Approach Applied to the Telekit System from the Danish TeleCare North Trial
Table 3
Distribution of the number of usability violations classified into heuristics per expert.
| | Heuristics | Expert 1 | Expert 2 | Expert 3 | Expert 4 | Expert 5 | Total | | HE1 | HE2 | HE1 | HE2 | HE1 | HE2 | HE1 | HE2 | HE1 | HE2 | HE1 | HE2 |
| | (1) Visibility of system status | 0 | 8 | 0 | 7 | 1 | 4 | 3 | 3 | 1 | 4 | 5 | 26 | | (2) Match between system and the real world | 5 | 4 | 8 | 7 | 7 | 4 | 14 | 11 | 15 | 3 | 49 | 29 | | (3) User control and freedom | 1 | 0 | 0 | 3 | 1 | 4 | 3 | 5 | 6 | 2 | 11 | 14 | | (4) Consistency and standards | 7 | 11 | 3 | 5 | 2 | 18 | 6 | 2 | 2 | 7 | 20 | 43 | | (5) Error prevention | 2 | 6 | 3 | 0 | 5 | 8 | 6 | 4 | 2 | 4 | 18 | 22 | | (6) Recognition rather than recall | 2 | 7 | 3 | 9 | 1 | 10 | 2 | 0 | 5 | 1 | 13 | 27 | | (7) Flexibility and efficiency of use | 3 | 5 | 2 | 3 | 0 | 6 | 1 | 4 | 2 | 4 | 8 | 22 | | (8) Aesthetic and minimalist design | 5 | 3 | 3 | 4 | 5 | 19 | 4 | 0 | 3 | 4 | 20 | 30 | | (9) Help users recognize, diagnose, and recover from errors | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 5 | 0 | | (10) Help and documentation | 1 | 1 | 0 | 0 | 0 | 5 | 1 | 3 | 1 | 1 | 3 | 10 |
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