Table 9 Comparisons of mean mastery probabilities in the first and second tests

1. Simple present/ progress

0.632/0.364

0.677/0.353

−2.027 (216)

0.044*

2. Zero conditional

0.340/0.405

0.323/0.381

0.636 (216)

0.526

3. Simple past/progressive

0.539/0.389

0.472/0.366

2.970 (216)

0.003*

4. Participles

0.749/0.387

0.762/0.376

−2.464 (216)

0.015*

5. Subject-verb agreement

0.446/0.356

0.588/0.359

−5.621 (216)

0.000*

6. Relative pronoun

0.538/0.338

0.612/0.317

− 2.801 (216)

0.006*

7. Used to

0.317/0.403

0.389/0.415

− 2.740 (216)

0.007*

8. Vocabulary

0.860/0.292

0.873/0.278

− 1.207 (216)

0.229

9. Expressions

0.794/0.327

0.831/0.305

−3.020 (216)

0.003*