Table 3. Bivariate Correlations Between Screen Time, Relative Theta, Theta/Beta Ratio, and Laboratory-Based Executive Function Outcomes.
| β (95% CI) | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| 1. 12-mo Screen time | 1 [Reference] | |||||||
| 2. Frontocentral relative theta | 0.36 (0.14 to 0.57) | 1 [Reference] | ||||||
| 3. Parietal relative theta | 0.37 (0.15 to 0.59) | 0.90 (0.86 to 0.95) | 1 [Reference] | |||||
| 4. Frontocentral theta/beta | 0.36 (0.16 to 0.57) | 0.86 (0.81 to 0.91) | 0.79 (0.69 to 0.89) | 1 [Reference] | ||||
| 5. Parietal theta/beta | 0.35 (0.14 to 0.57) | 0.80 (0.75 to 0.85) | 0.88 (0.85 to 0.91) | 0.90 (0.85 to 0.95) | 1 [Reference] | |||
| 6. Task: inhibition | −0.29 (−0.42 to −0.14) | −0.17 (−0.38 to 0.05) | −0.19 (−0.38 to 0.01) | −0.24 (−0.42 to −0.05) | −0.23 (−0.42 to −0.06) | 1 [Reference] | ||
| 7. Task: shifting | −0.29 (−0.42 to −0.15) | −0.18 (−0.38 to 0.02) | −0.18 (−0.38 to 0.02) | −0.24 (−0.40 to −0.03) | −0.21 (−0.39 to −0.03) | 0.86 (0.83 to 0.88) | 1 [Reference] | |
| 8. Task: working memory | −0.15 (−0.28 to −0.03) | −0.10 (−0.31 to 0.10) | −0.18 (−0.37 to 0.02) | −0.24 (−0.41 to −0.04) | −0.25 (−0.45 to −0.05) | 0.28 (0.19 to 0.36) | 0.32 (0.23 to 0.40) | 1 [Reference] |