| Typicality: | 0.521 |
| Saliency: | 0.408 |
| as a tool | 10 | purpose |
| for their analysis | 7 | purpose |
| to investigate the causes of sleep | 6 | purpose |
| researcher → use → study | 20 |
| researcher → use → research | 18 |
| researcher → use → case studies | 8 |
| negative | neutral | positive |
| 0.070 | 0.713 | 0.216 |
| Raw frequency | 46 |
| Normalized frequency | 0.408 |
| Modifier score | 0.800 |
| Perplexity | 499.387 |