Table 2.
Sample correlations for key study variables.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Academic ability T2 | − | |||||||||||
| 2. Executive function T1 | 0.64** | − | ||||||||||
| 3. Executive function T2 | 0.68** | 0.49** | − | |||||||||
| 4. Object assembly T1 | 0.52** | 0.43** | 0.42** | − | ||||||||
| 5. Matrix reasoning T2 | 0.54** | 0.31** | 0.39** | 0.42** | − | |||||||
| 6. Receptive vocab. T1 | 0.44** | 0.37** | 0.42** | 0.39** | 0.37** | − | ||||||
| 7. Negative interaction T1 | −0.19+ | −0.09 | −0.29** | −0.25** | −0.12 | −0.21** | − | |||||
| 8. Contingency rule T1 | 0.13 | 0.18+ | 0.26** | 0.02 | −0.08 | 0.10 | −0.12 | − | ||||
| 9. HLE T2 | 0.20* | 0.03 | 0.12 | −0.04 | 0.17+ | 0.06 | 0.17+ | 0.05 | − | |||
| 10. Age (concurrent) | 0.73** | 0.55** | 0.51** | 0.52** | 0.48** | 0.52** | −0.06 | 0.06 | 0.01 | − | ||
| 11. Gender | −0.11 | −0.09 | −0.15 | 0.10 | 0.02 | −0.16* | 0.19+ | −0.06 | −0.25** | 0.05 | − | |
| 12. Parental education | 0.14 | 0.16 | 0.15 | 0.12 | 0.19+ | 0.15 | 0.05 | 0.20* | 0.05 | −0.01 | 0.06 | − |
**
p < 0.01.
*
p < 0.05.
+
p < 0.10. Vocab, Vocabulary; Negative Interaction, Negative Parent-Child Interaction; Contingency Rule, Parental use of Contingency Rule; HLE, Home Learning Environment; T1, Time 1; T2, Time 2.