| in reducing heroin use | 20 | transitive-object |
| very | 17 | degree |
| highly | 8 | degree |
| methadone → be → effective | 89 |
| methadone → be → effective treatment | 10 |
| methadone → be considered → effective | 5 |
| methadone → be → effective way | 5 |
| methadone → be → effective medication | 4 |
| methadone → be → most effective | 3 |
| negative | neutral | positive |
| 0.082 | 0.310 | 0.607 |
| Raw frequency | 116 |
| Normalized frequency | 0.984 |
| Modifier score | 0.500 |
| Perplexity | 40.373 |