Table 6.
Percentage of variance of negative emotionality explained by genetic and environmental influences at age 14, 20, and 24 months.
| Months | Common influences across age |
Age-specific influences |
||||
|---|---|---|---|---|---|---|
| A (%) | C (%) | E | A (%) | C (%) | E (%) | |
| 14 | 62 | 5 | – | 0 | 1 | 32 |
| 20 | 29 | 38 | – | 11 | 0 | 22 |
| 24 | 13 | 51 | – | 0 | 0 | 36 |
–Common non-shared environmental influences could be dropped from the model without a significant decrement in fit, and did not contribute to the variance of negative emotionality in the final model. A = genetic influences; C = shared environmental influences; E = non-shared environmental influences.