Table 2.
rmz | rdz | a2 | c2 | e2 | % A transmitted from previous age | % C transmitted from previous age | |
---|---|---|---|---|---|---|---|
Attention | |||||||
Age 12 | 0.74 (0.64 – 0.81)* | 0.08 (−0.12 – 0.27) | 0.73 (0.64–0.79)* | 0 | 0.27 (0.21–0.36)* | --- | --- |
Age 14 | 0.77 (0.70–0.83)* | 0.36 (0.22–0.49)* | 0.54 (0.44–0.63)* | 0.22 (0.15–0.30)* | 0.24 (0.19–0.31)* | 100% | --- |
Age 16 | 0.84 (0.77–0.89)* | 0.53 (0.37–0.66)* | 0.69 (0.54–0.80)* | 0.13 (0.04–0.26)* | 0.18 (0.13–0.25)* | 51.9% | 100% |
| |||||||
Activity | |||||||
Age 12 | 0.87 (0.82–0.91)* | 0.51 (0.35–0.64)* | 0.73 (0.58–0.84)* | 0.13 (0.02–0.28)* | 0.15 (0.11–0.19)* | --- | --- |
Age 14 | 0.88 (0.84–0.91)* | 0.72 (0.63–0.79)* | 0.31 (0.19–0.46)* | 0.57 (0.41–0.68)* | 0.13 (0.10–0.16)* | 60.0% | 100% |
Age 16 | 0.94 (0.91–0.96)* | 0.75 (0.65–0.83)* | 0.42 (0.28–0.61)* | 0.51 (0.33–0.65)* | 0.07 (0.05–0.09)* | 100% | 23.9% |
Note: All proportions of variance calculated controlling for gender. rMZ and rDZ: intra-pair correlations in monozygotic and dizygotic twin pairs; respectively;
indicates significance at the p<0.05 level;
A: additive genetic influences; C: shared environmental influences; E: non-shared (individually-unique) environmental influences; a2: proportion of total variance explained by additive genetic influences; c2: proportion of variance explained by shared environmental influences; e2: proportion of variance attributable to non-shared environmental influences.