| in people with depression | 4 | other |
| serotonin → be → lower | 6 |
| serotonin → be → reduced | 5 |
| serotonin → cause → decrease | 3 |
| serotonin → be → decreased | 3 |
| negative | neutral | positive |
| 0.378 | 0.554 | 0.068 |
| Raw frequency | 17 |
| Normalized frequency | 0.324 |
| Modifier score | 0.500 |
| Perplexity | 83.736 |