| Typicality: | 0.599 |
| Saliency: | 0.438 |
| in one study37 | 7 | temporal |
| for heroin | 6 | purpose |
| during this phase | 4 | temporal |
| rat → be trained to press → lever | 24 |
| rat → be trained to press → the lever | 5 |
| rat → be trained to push → lever | 3 |
| rat → be trained to → lever press | 3 |
| negative | neutral | positive |
| 0.215 | 0.750 | 0.035 |
| Raw frequency | 35 |
| Normalized frequency | 0.438 |
| Modifier score | 1.000 |
| Perplexity | 43.663 |