| Level | Details | Total Score |
| Criterion 1: List of Errors | ||
| 1 | No list of errors or errors incorrect | 0 |
| 2 | Partial list (less than five errors) | 1 - 4 |
| 3 | Complete list (five or more errors) | 5 |
| Criterion 2: Understanding the Concept of Diagonal | ||
| 1 | No understanding | 0 |
| 2 | “Partial” understanding | 1 - 4 |
| 3 | Full understanding | 5 |
| Criterion 3: Sample Questions | ||
| 1 | Samples unsatisfactory | 0 |
| 2 | Samples satisfactory—no explanations | 1 - 2 |
| 3 | Samples satisfactory—partial explanations | 3 |
| 4 | Samples satisfactory with explanations | 5 |
| Criterion 4: Stating Which Error the Questions Test | ||
| 1 | No | 0 |
| 2 | Yes | 1 - 5 |