Table 3.
Mean SUS score and mid-point comparison.
| SUS item | Mid-point | 3D-MAP |
Gap score | df | t-value | p-value (two-tail) |
|---|---|---|---|---|---|---|
| Mean ± SD | ||||||
| S1: Use 3D-MAP frequently | 3.00 | 3.20 ± 1.14 | 0.20 | 9 | 0.55 | 0.591 |
| S2: Unnecessarily complexa | 3.00 | 4.60 ± 0.52 | 1.60 | 9 | 9.80 | 0.000* |
| S3: Easy to use | 3.00 | 4.60 ± 0.52 | 1.60 | 9 | 9.80 | 0.000* |
| S4: Support of a technical persona | 3.00 | 4.80 ± 0.42 | 1.80 | 9 | 13.50 | 0.000* |
| S5: The various functions were well integrated | 3.00 | 3.30 ± 0.95 | 0.30 | 9 | 1.00 | 0.343 |
| S6: Too much inconsistencya | 3.00 | 4.00 ± 0.94 | 1.00 | 9 | 3.35 | 0.008* |
| S7: Learn to use 3D-MAP very quickly | 3.00 | 4.60 ± 0.52 | 1.60 | 9 | 9.80 | 0.000* |
| S8: Cumbersome to usea | 3.00 | 4.30 ± 0.95 | 1.30 | 9 | 4.33 | 0.002* |
| S9: Confident using 3D-MAP | 3.00 | 4.60 ± 0.70 | 1.60 | 9 | 7.24 | 0.000* |
| S10: Learn a lot of things before using 3D-MAPa | 3.00 | 4.90 ± 0.32 | 1.90 | 9 | 19.00 | 0.000* |
SUS: System Usability Scale; SD: standard deviation.
a
Responses of negative items were reversed to align with positive items.
*
Statistically significant ≤0.05 confidence level.