| as a central nervous system | 3 | manner |
| jitteriness, | 2 | other |
| caffeine → cause → alertness | 12 |
| caffeine → affect → alertness | 5 |
| caffeine → cause → increased alertness | 4 |
| caffeine → have → increased alertness | 3 |
| negative | neutral | positive |
| 0.182 | 0.458 | 0.360 |
| Raw frequency | 24 |
| Normalized frequency | 0.346 |
| Modifier score | 0.500 |
| Perplexity | 45.599 |