| in them | 4 | location |
| in test animals | 3 | other |
| in plants | 2 | location |
| radiation → cause → mutation | 11 |
| radiation → induce → mutation | 5 |
| radiation → cause → genetic mutations | 3 |
| radiation → increase → the risks of mutation | 3 |
| negative | neutral | positive |
| 0.701 | 0.284 | 0.015 |
| Raw frequency | 22 |
| Normalized frequency | 0.466 |
| Modifier score | 0.500 |
| Perplexity | 62.576 |