| Typicality: | 0.286 |
| Saliency: | 0.289 |
| caffeine → increase → serotonin | 6 |
| caffeine → activate → serotonin | 5 |
| caffeine → help to increase → serotonin | 3 |
| caffeine → be shown to inhibit → levels of serotonin | 3 |
| negative | neutral | positive |
| 0.191 | 0.391 | 0.418 |
| Raw frequency | 17 |
| Normalized frequency | 0.289 |
| Modifier score | 0.500 |
| Perplexity | 78.093 |