Investigating the genetic and environmental structure of Cloninger's personality dimensions in adolescence
| Autor: | Noa Heiman, Susan E. Young, John K. Hewitt, Michael C. Stallings |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Persistence (psychology)
Male Adolescent media_common.quotation_subject Twins Environment Models Psychological Personality Assessment Environmental structure Sex Factors Sex factors Surveys and Questionnaires Personality Humans Child Genetics (clinical) media_common Age Factors Obstetrics and Gynecology Heritability Twin study Pediatrics Perinatology and Child Health Trait Female Personality Assessment Inventory Psychology Social psychology Demography |
| Zdroj: | Twin research : the official journal of the International Society for Twin Studies. 7(5) |
| ISSN: | 1369-0523 |
| Popis: | In this study we examined the genetic and environmental structure of four dimensions from Cloninger's personality system: novelty-seeking (NS), harm-avoidance (HA), reward-dependence (RD), and persistence (PS). Although adult twin studies suggest that these personality dimensions are moderately heritable, this is the first twin study of Cloninger's personality dimensions in adolescence--a period marked by significant physiological and social changes. Study participants included 1851 adolescent twins between the ages of 11 and 18 years; 878 complete twin pairs and 95 singleton-responding twins. Subjects were participants in two community-based samples of twins residing in the state of Colorado. Results indicated that cross-sectional mean levels for NS, HA and RD tended to show modest increases across the adolescent years, while PS showed modest mean decreases. Consistent sex differences in means were found only for RD. Univariate biometrical twin models were used to decompose trait variance into genetic and environmental sources. Results indicated that for NS, HA and RD additive genetic influences and unique environmental effects were sufficient to explain the data. PS, however, could be explained by unique and common environmental effects only, with different patterns of common environmental effects for males and females. We found moderate heritability estimates for NS, HA and RD ranging from .28 to .36--with no evidence for sex-limitation in those influences. |
| Databáze: | OpenAIRE |
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