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Mean (standard deviation) and effect size (Cohen’s d) of mental rotation measures in the pretest and post-test and the pre-post-test differences (increases) for control group and training group in 2nd course of Preschool Education.
| Pretest | Post-test | Increase | d | |
|---|---|---|---|---|
| Control group (N = 31) | 11.42 | 15.17 | 3.26∗ | |
| (3.93) | (4.07) | (3.64) | ||
| *0.77 | ||||
| Training Group (N = 30) | 11.20 | 17.07 | 5.87∗ | |
| (3.85) | (3.05) | (3.14) | ||
∗p < 0.05, ∗∗p < 0.01.
