| Literature DB >> 3216289 |
N L Pedersen1, R Plomin, G E McClearn, L Friberg.
Abstract
The relative importance of genetic and environmental factors for neuroticism, extraversion, impulsivity, and monotony avoidance were estimated in a sample of 99 monozygotic and 229 dizygotic pairs of twins reared apart (TRA) and a matched sample of 160 monozygotic and 212 dizygotic pairs of twins reared together (TRT). The average age was 58.6 (SD = 13.6); 72% of the twins were 50 or older. Model-fitting analyses verified the importance of genetic factors for all four measures; from 23% to 45% of the total variation was attributable to genetic sources. There was considerable evidence that these factors were operating in a nonadditive manner for extraversion and impulsivity. Shared environment accounted for less than 10% of the variance; some evidence for selective placement was found for neuroticism.Mesh：
Year: 1988 PMID： 3216289 DOI： 10.1037//0022-3514.55.6.950
Source DB: PubMed Journal: J Pers Soc Psychol ISSN： 0022-3514