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Stability and change in genetic and environmental components of personality in old age

Artikel i vetenskaplig tidskrift
Författare S Read
G.M Vogler
N.L Pedersen
Boo Johansson
Publicerad i Personality and Individual Differences
Sidor 1637-1647
Publiceringsår 2006
Publicerad vid Psykologiska institutionen
Sidor 1637-1647
Språk en
Ämnesord Genetics and environment; stability and change in personality; old age; twins
Ämneskategorier Psykologi

Sammanfattning

Stability and change in the mean levels and sources of variation in personality was examined. A sample of 149 monozygotic and 202 dizygotic twin pairs over 80 years were studied three times with a 2-year interval between measurement occasions. The Eysenck Personality Inven-tory to measure extraversion and neuroticism was used. Linear mixed models and Cholesky variance decomposition were carried out (age, gender and mortality controlled). High mean level stability was found in extraversion and neuroticism. Mortality was related to lower scores in extraversion and higher scores in neuroticism. In extraversion and neuroticism, ge-netic effects were moderate. Though no new genetic contributions emerged over time, signifi-cant new environmental effects were found over time. Controlling for mortality slightly in-creased genetic effect in extraversion

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