Table 5.
Data entry speed and accuracy for different interface characteristics.
| Interface characteristics | Mean time (sec) | Mean accuracy, % | Minimum number of actions measured | Selection | Design source |
| Numeric keyboard | 3.41 | 97.5 | 1 per digit | Deterministic | Literature |
| Stepper | 6.02 | 98.2 | Sum of the digits | Deterministic | Android OS |
| Circle | 6.7 | 93 | 1 per digit | Deterministic | Computer scientists |
| Wheeler | 6.9 | 97.2 | 1 per number | Nondeterministic | iOS |
| Columns | 8·6 | 93.9 | 1 per number | Nondeterministic | Caregivers |
| Character recognition | 10.5 | 84.4 | 1 per digit | Nondeterministic | Palm OS |