| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| internal validity definition | 0.08 | 0.1 | 9551 | 6 | 28 |
| internal | 0.48 | 0.6 | 6939 | 25 | 8 |
| validity | 1.31 | 0.3 | 9347 | 100 | 8 |
| definition | 0.54 | 0.9 | 7211 | 36 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| internal validity definition | 0.67 | 1 | 995 | 76 |
