Table 1.
Summary of parameters of structural model for correlations between relatives
| Parameter | Description | Free1 |
|---|---|---|
| g | Path from persistent additive genetic effect to adult phenotype | F |
| d | Path from persistent additive genetic effect to juvenile phenotype | F |
| b | Path from juvenile limited genetic effect to juvenile phenotype | F |
| u | Path from adult shared environment to adult phenotype | F |
| c | Path from juvenile shared environment to juvenile phenotype | F |
| v | Path from juvenile-specific shared environment to phenotype | F |
| w | Path from parental phenotype to juvenile shared environment | D |
| m | Correlation between spouses | F |
| f | Correlation between additive genetic effects of siblings/twins | D |
| r | Correlation between persistent genetic and shared environmental effects | D |
| q | Correlation between juvenile-limited additive genetic effects | D |
| a | Correlation between genes of parents and phenotype of parents | D |
| wc | Partial regression of juvenile outcome on parental phenotype | D |
Note:
1
Parameters are designated as free (F), or derived (D) from other model parameters. Derived parameters may be expressed explicitly or implied by constraints (see text).