The etiology of observed negative emotionality from 14 to 24 months. Journal Article uri icon



  • We examined the magnitude of genetic and environmental influences on observed negative emotionality at age 14, 20, and 24 months. Participants were 403 same-sex twin pairs recruited from the Longitudinal Twin Study whose emotional responses to four different situations were coded by independent raters. Negative emotionality showed significant consistency across settings, and there was evidence of a latent underlying negative emotionality construct. Heritability decreased, and the magnitude of shared environmental influences increased, for the latent negative emotionality construct from age 14 to 24 months. There were significant correlations between negative emotionality assessed at age 14, 20, and 24 months, and results suggested common genetic and shared environmental influences affecting negative emotionality across age, and that age-specific influences are limited to non-shared environmental influences, which include measurement error.

publication date

  • January 1, 2012

has restriction

  • gold

Date in CU Experts

  • October 4, 2013 2:39 AM

Full Author List

  • Rhee SH; Corley RP; Friedman NP; Hewitt JK; Hink LK; Johnson DP; Robinson J; Smith AK; Young SE

author count

  • 9

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1664-8021

Additional Document Info

start page

  • 9


  • 3