| extensively | 4 | degree |
| rarely | 3 | degree |
| less well | 3 | degree |
| effect → be → studied | 15 |
| effect → be → investigated | 9 |
| effect → be → evaluated | 7 |
| negative | neutral | positive |
| 0.161 | 0.750 | 0.089 |
| Raw frequency | 31 |
| Normalized frequency | 0.504 |
| Modifier score | 0.100 |
| Perplexity | 43.040 |