| Frequency of Errors Based on Newman’s Error Hierarchy Model | |||||
| Item | Transformation | Process Skills | Encoding | Negligence | Total** |
| 11 | 1 | 6 |
| 2 | 9 |
| 12 | 1 | 3 |
| 1 | 5 |
| 13 | 2 | 18 |
|
| 20 |
| 14 | 3 | 16 |
| 5 | 24 |
| 15 | 2 | 21 |
| 4 | 27 |
| Total** | 9 | 64 |
| 25 | 85 |