Abstract
Several studies on twins in recent years have revealed both genetic and environmental contributions to personality stability and change in adulthood. However, knowledge on such contributions during adolescence is limited. The present study examined sources of the variances of intra-individual absolute change in personality during adolescent years in 347 pairs of Japanese twins (270 monozygotic and 77 dizygotic twin pairs). Phenotypic analyses with the difference score model showed statistically significant mean-level increases in neuroticism-related traits. Then we applied the Cholesky decomposition model to the difference score model to examine heritability and environmentality of intra-individual change in personality traits. Biometric analyses revealed that the best-fitting model for adolescent personality included additive genetic and nonshared environmental influences. Heritability estimates of intra-individual personality change ranged approximately from 0.00 to 0.27. These findings suggest that both genetic and environmental effects have substantial roles in the etiology of mean-level personality change in adolescence.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
