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Comparisons of the grammatical range and accuracy scores
| Mean difference | Z/U | p | |
|---|---|---|---|
| Control group (CG) posttest–pretest | 0.01 | Z = − .783 | 0.434 |
| The experimental group (EG) posttest–pretest | 0.33 | Z = − 2.585 | 0.01 |
| Pretest: CG–EG | − 0.12 | U = 333 | 0.919 |
| Posttest: CG–EG | − 0.44 | U = 247.5 | 0.065 |
