Table 2.
The number of the identified problems per method and usability group
| Heuristics evaluation N (%) |
Think aloud N (%) |
Think aloud + Heuristics evaluation N (%) |
Both Think aloud and Heuristics evaluation N (%) |
Only Think aloud N (%) |
Only Heuristics evaluation N (%) |
|
|---|---|---|---|---|---|---|
| Satisfaction | 120 (44.6) | 113 (43.46) | 190 (45) | 43 (40.5) | 70 (45.45) | 77 (47.23) |
| Effectiveness | 23 (8.5) | 26 (10) | 34 (8) | 15 (14.15) | 11 (7.14) | 8 (4.9) |
| Efficiency | 20 (7.5) | 45 (17.3) | 53 (12.5) | 12 (11.35) | 33 (21.43) | 8 (4.9) |
| Learnability | 38 (14.12) | 26 (10) | 53 (12.5) | 11 (10.4) | 15 (9.75) | 27 (16.57) |
| Error | 68 (25.28) | 50 (19.24) | 93 (22) | 25 (23.6) | 25 (16.23) | 43 (26.4) |
| No. of usability problems | 269 | 260 | 423 | 106 | 154 | 163 |
| Percentage of the problems identified by the two methods to the total number of problems | 25% | 36% | 39% |