title: The strength of multivariate twin studies: testing for shared and distinctive aetiology among different sets of behavioural traits--reflections on Lewis et al. (2014).
abstract: This contribution discusses the article by Lewis et al. on the relationship between variation in normal personality and adolescent behavioural problems and puts the study into the perspective of the value of twin studies of multivariate behavioural traits, which enable the analyses of genetic pleiotropy and causality.
authors.affiliation: Netherlands Twin Register, Department of Biological Psychology, VU University Amsterdam, Amsterdam, The Netherlands.
authors.forename: Dorret I
authors.initials: DI
authors.lastname: Boomsma
mesh_terms: D000294:Adolescent Behavior / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D010551:Personality / Q000235:genetics*
keywords: Adolescent behavioural problems; etiology; genetic pleiotropy; multivariate traits; twin studies