| Research Method | Primary | Secondary | Total | Percentage |
| Quantitative | 60 | 2 | 62 | 69.7% |
| Mixed methods | 10 |
| 10 | 11.2% |
| Qualitative | 8 | 1 | 9 | 10.1% |
| Review |
| 5 | 5 | 5.6% |
| Experimental | 3 |
| 3 | 3.4% |
| Totals | 81 | 8 | 89 |
|