| on mood | 7 | transitive-object |
| on learning | 7 | transitive-object |
| in the body | 6 | location |
| serotonin → have → effect | 16 |
| serotonin → have → many effects | 7 |
| serotonin → have → influence | 5 |
| serotonin → exert → its effects | 4 |
| serotonin → have → significant impact | 3 |
| serotonin → have → the effect | 3 |
| negative | neutral | positive |
| 0.153 | 0.675 | 0.173 |
| Raw frequency | 38 |
| Normalized frequency | 0.474 |
| Modifier score | 0.500 |
| Perplexity | 184.557 |