Table 3.
User ratings of the STOPa mobile phone app (max score=5) from usability testing.
| STOP mobile app feature | Pilot 1, mean (SD) | Pilot 2, mean (SD) |
| Ease of use | 4.2 (0.45) | 4.25 (0.50) |
| User interface | 4.2 (0.84) | 4.5 (0.58) |
| Interactive features | 4.2 (0.84) | 4.25 (0.96) |
| Design and graphics | 4.4 (0.55) | 5 (0.00) |
| Help provision | N/Ab | 4 (0.82) |
| Security and privacy | 4.4 (0.55) | 5 (0.00) |
| Errors or bugs | 4.4 (0.89) | Descriptive account of any errors or bugs. Any errors identified have been resolved. |
| Overall experience | 4 (0.71) | Descriptive account of overall experience with the app (see Multimedia Appendix 1) |
aSTOP: Successful Treatment of Paranoia.
bN/A: not applicable.