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Descriptive statistics for children’s performance.
| Ability group (n = 37) | Effort group (n = 35) | Control group (n = 31) | Total (n = 103) | F (2,100) | ηp2 | ||
|---|---|---|---|---|---|---|---|
| P1 | M | 7.22 | 6.51 | 6.94 | 3.26 | 2.32 | 0.04 |
| SD | 1.36 | 1.42 | 1.39 | 0.10 | |||
| P3 | M | 7.32 | 7.54 | 8.06 | 3.98 | 3.35∗ | 0.06 |
| SD | 1.25 | 1.15 | 1.18 | 0.07 | |||
| Performance change | M | 0.11 | 1.03 | 1.13 | 3.55 | 7.17∗∗ | 0.25 |
| SD | 1.15 | 1.27 | 1.34 | 0.07 | |||
P1, performance on the first set of problems; P3, performance on the third set of problems. ∗p < 0.05.
