Table 3.
Correlations between IQ, age, and the working-memory tasks.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1. IQ | −0.12 | 0.45** | 0.22 | 0.24 | 0.11 | −0.01 | 0.34* | 0.15 | 0.10 | |
| 2. Age | 0.21 | 0.22 | 0.02 | 0.19 | −0.16 | 0.05 | 0.16 | 0.04 | ||
| 3. Digit forward | 0.38* | 0.23 | 0.10 | 0.35* | 0.55** | 0.27 | 0.13 | |||
| 4. Letter forward | 0.06 | −0.10 | 0.07 | 0.03 | 0.01 | −0.10 | ||||
| 5. Corsi forward | 0.02 | 0.18 | 0.14 | 0.29 | 0.22 | |||||
| 6. Mazes memory | 0.20 | 0.12 | 0.23 | −0.06 | ||||||
| 7. Digit backward | 0.64** | 0.24 | 0.25 | |||||||
| 8. Letter backward | 0.35* | 0.21 | ||||||||
| 9. Corsi backward | 0.11 | |||||||||
| 10. Sun moon |
*
p < 0.05,
**
p < 0.01, (n = 40).