Hostname: page-component-84b7d79bbc-tsvsl Total loading time: 0 Render date: 2024-07-27T14:01:53.510Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of the Chorion Type on Prosocial Behavior in Young South Korean Twins

Published online by Cambridge University Press:  21 February 2012

Yoon-Mi. Hur
Yoon-Mi. Hur*
Affiliation:
Chonnam National University, Kwangju, South Korea. maryhur@hanafos.com
*
*Address for correspondence: Yoon-Mi Hur, Department of Psychology, Chonnam National University, Kwangju, South Korea.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The present study examined the possible effects of chorionicity of twins on variation of prosocial behavior in the classical twin design. Mothers of 56 pairs of monochorionic monozygotic (MCMZ) twins, 34 pairs of dichorionic monozygotic (DCMZ) twins, and 316 pairs of dizygotic (DZ) twins rated their children's prosocial behavior. The MCMZ correlation for prosocial behavior was similar to the DCMZ correlation (.63 vs. 61), but both correlations were higher than the DZ correlation (.33). Models incorporating the chorion effects were fit to the data. Genetic, shared and nonshared environmental, and chorion effects in the full model were, respectively, 53% (95% CI: 1–70%), 7% (95% CI: 0–37%) , 40% (95% CI: 29–54%), and 0% (95% CI: 0–27%), with the effects of chorion and shared environment being nonsignificant. These findings indicate that genetic and environmental factors in prosocial behavior estimated from twin studies are not significantly influenced by the chorion type of MZ twins.

Type
Articles
Information
Twin Research and Human Genetics , Volume 10 , Issue 5 , 01 October 2007 , pp. 773 - 777
Copyright
Copyright © Cambridge University Press 2007