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Design of studies
| Design | Number |
|---|---|
| Quasi-experimental designs | |
| Pre-test/post-test nonequivalent group design | 9 |
| The post-test-only nonequivalent group design (The static-group comparison design) | 4 |
| The one-group pre-test/post-test design | 1 |
| Crossover method | 1 |
| True experimental designs | |
| The pre-test/post-test control group design | 4 |
| The post-test-only control group design | 2 |
