Beyond the heritability of life satisfaction–The roles of personality and twin-specific influences
E Hahn, W Johnson, FM Spinath - Journal of Research in Personality, 2013 - Elsevier
In a behavior genetic design, we investigated individual differences in life satisfaction and its
relation to personality with respect to both internal and external influences. We questioned
the absence of shared environment and examined the specific contribution of additive and
non-additive genetic influences. We also tested for twin-specific environmental influences in
a total sample of 1308 dyads including identical and fraternal twins, siblings, mother–child
and grandparent–child pairs. The results showed substantial shared environmental …
relation to personality with respect to both internal and external influences. We questioned
the absence of shared environment and examined the specific contribution of additive and
non-additive genetic influences. We also tested for twin-specific environmental influences in
a total sample of 1308 dyads including identical and fraternal twins, siblings, mother–child
and grandparent–child pairs. The results showed substantial shared environmental …
