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Some personality traits converge gradually by long-term partnership through the lifecourse - Genetic and environmental structure of Cloninger's temperament and character dimensions

Title
Some personality traits converge gradually by long-term partnership through the lifecourse - Genetic and environmental structure of Cloninger's temperament and character dimensions
Authors
Yang, SarahSung, JoohonKim, Ji-HaeSong, Yun-MiLee, KayoungKim, Han-NaKim, Hyung-LaeCloninger, C. Robert
Ewha Authors
김형래김한나
SCOPUS Author ID
김형래scopus; 김한나scopus
Issue Date
2015
Journal Title
JOURNAL OF PSYCHIATRIC RESEARCH
ISSN
0022-3956JCR Link1879-1379JCR Link
Citation
vol. 63, pp. 43 - 49
Keywords
PersonalityTemperament and character inventoryTwin-family studyHeritability
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Indexed
SCI; SCIE; SSCI; SCOPUS WOS scopus
Abstract
Temperament and Character Inventory (TCI) is a comprehensive personality inventory that is widely used in behavioral genetics. The original theory suggested that temperament traits were under genetic influences, whereas character traits were gradually built by an interaction between temperaments and environment until early adulthood. This study attempted to evaluate TCI by examining the genetic and environmental contributions to personality with particular attention to spousal effects. From 687 families, a total of 3459 Korean adult individuals completed the survey. Among them, there were 542 Monozygotic (MZ) twin pairs and 122 Dizygotic twin pairs. Intraclass correlation coefficients (ICCs) and heritability were calculated to examine the genetic and shared environmental contributions to personality. Moderate genetic contributions (0.17-0.43) were found for all TCI traits along with the evidence of shared environment (0.11-031) for harm avoidance (HA) and all characters. The ICCs of TCI in MZ pairs ranged 0.36-0.46. Spouses' had little resemblance for temperament, whereas for character dimensions, spouses (0.27-0.38) were more similar than first degree relatives (0.10-0.29). Resemblance between spouses increased with duration of marriage for most characters and HA. When the growing similarities between spouses were compared with their MZ cotwins' for subgroup of 81 trios, self-directedness (SD) of character showed even more similarities toward their spouses than cotwins as partnership duration increased (r = 0.32). Our findings with regard to change in SD into late adulthood support the psychobiological theory of temperament and character, which suggests that both personality domains have distinct developmental trajectories despite equally large genetic influences. (C) 2015 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.jpsychires.2015.01.020
Appears in Collections:
의학전문대학원 > 의학과 > Journal papers
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