| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| maturation is one type of external validity | 0.46 | 0.4 | 1356 | 26 | 43 |
| maturation | 1.43 | 1 | 9610 | 45 | 10 |
| is | 1.84 | 0.4 | 7631 | 78 | 2 |
| one | 1.26 | 0.5 | 730 | 86 | 3 |
| type | 0.95 | 0.8 | 569 | 15 | 4 |
| of | 1.1 | 0.2 | 2197 | 90 | 2 |
| external | 0.87 | 0.3 | 5379 | 13 | 8 |
| validity | 0.57 | 0.2 | 7858 | 79 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| maturation is one type of external validity | 1.76 | 0.1 | 672 | 63 |
