Table 3.
Correlations between the variables in Grade 2 (below the diagonal) and Grade 4 (above the diagonal).
| 1. | 2. | 3. | 4. | 5. | 6. | 7. | 8. | 9. | 10. | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1. Math problem solving | 0.56** | 0.28** | -0.28** | -0.09 | 0.38** | 0.21* | 0.09 | 0.06 | 0.23** | |
| 2. Numerical operation | 0.19* | 0.22* | -0.27** | 0.01 | 0.26** | 0.27** | 0.15 | 0.10 | 0.15 | |
| 3. Math fluency | 0.23* | -0.07 | -0.09 | -0.00 | -0.05 | 0.24* | 0.09 | 0.06 | 0.15 | |
| 4. Number line estimation | -0.52** | -0.14 | -0.21* | 0.04 | -0.21* | -0.08 | -0.04 | -0.08 | -0.09 | |
| 5. Dot estimation | 0.15 | 0.10 | 0.05 | -0.28** | -0.01 | 0.16 | -0.02 | 0.16 | 0.04 | |
| 6. Nonverbal intelligence | 0.26** | 0.10 | 0.01 | -0.32** | 0.04 | 0.14 | -0.00 | -0.02 | 0.18 | |
| 7. Inhibition | 0.27** | 0.12 | 0.12 | -0.26** | 0.08 | -0.05 | -0.07 | 0.10 | 0.02 | |
| 8. Working memory | 0.29** | -0.08 | 0.21* | -0.25* | 0.21* | 0.28** | 0.00 | 0.04 | 0.02 | |
| 9. Age | 0.16 | 0.12 | 0.12 | -0.13 | -0.04 | 0.18 | 0.25** | -0.03 | 0.00 | |
| 10. Gender | 0.07 | 0.16 | 0.03 | -0.13 | -0.12 | 0.07 | -0.01 | -0.08 | 0.18 |
∗p < 0.05, ∗∗p < 0.01.