A twin study of state and trait anxiety in childhood and adolescence

Lisa N. Legrand, Matt McGue, William G. Iacono

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


Little research has addressed the relative influence of genetic and environmental factors on subclinical levels of anxiety in children. Of the two twin studies to date, one concluded that measures of adolescents' self-reported trait anxiety were best explained by shared environmental factors, while the second determined that approximately half the variance was attributable to genetic effects. The present study, using a sample of 547 twin pairs, reached conclusions similar to those of Topolski et al. Heritability was estimated at 45%. Measures of state anxiety conformed more closely to Thapar and McGuffin's findings, with environmental factors accounting for the variance.

Original languageEnglish (US)
Pages (from-to)953-958
Number of pages6
JournalJournal of Child Psychology and Psychiatry and Allied Disciplines
Issue number6
StatePublished - Sep 1999


  • Anxiety
  • Behavioural genetics
  • Genetics
  • Twins

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