| to judge learning achievements | 18 | purpose |
| absolutely | 11 | degree |
| in order | 7 | degree |
| feedback → be → necessary | 73 |
| feedback → be → imperative | 13 |
| feedback → be → desirable | 8 |
| negative | neutral | positive |
| 0.100 | 0.562 | 0.338 |
| Raw frequency | 94 |
| Normalized frequency | 0.542 |
| Modifier score | 0.550 |
| Perplexity | 38.539 |