title: Prospective association of childhood receptive vocabulary and conduct problems with self-reported adolescent delinquency: tests of mediation and moderation in sibling-comparison analyses.
abstract: Associations among receptive vocabulary measured at 4-9 years, mother-reported childhood conduct problems at 4-9 years, and self-reported adolescent delinquency at 14-17 years were assessed using data from a prospective study of the offspring of a large U.S. nationally representative sample of women. A novel quasi-experimental strategy was used to rule out family-level confounding by estimating path-analytic associations within families in a sibling comparison design. This allowed simultaneous tests of the direct and indirect effects of receptive vocabulary and childhood conduct problems, and of their joint moderation, on adolescent delinquency without family-level environmental confounding. The significant association of receptive vocabulary with later adolescent delinquency was indirect, mediated by childhood conduct problems. Furthermore, a significant interaction between receptive vocabulary and childhood conduct problems reflected a steeper slope for the predictive association between childhood conduct problems and adolescent delinquency when receptive vocabulary scores were higher. These findings of significant indirect association were qualitatively identical in both population-level and within-family analyses, suggesting that they are not the result of family-level confounds.
authors.affiliation: Department of Health Studies (MC 2007), University of Chicago, 5841 South Maryland Avenue, Chicago, IL, 6063, USA, blahey@uchicago.edu.
authors.forename: Benjamin B
authors.initials: BB
authors.lastname: Lahey
authors.forename: Brian M
authors.initials: BM
authors.lastname: D'Onofrio
authors.forename: Carol A
authors.initials: CA
authors.lastname: Van Hulle
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Rathouz
mesh_terms: D000293:Adolescent; D002648:Child; D002653:Child Behavior Disorders / Q000453:epidemiology* / Q000209:etiology; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007604:Juvenile Delinquency / Q000706:statistics & numerical data*; D007804:Language Development; D008297:Male; D011446:Prospective Studies; D035781:Siblings; D014481:United States / Q000453:epidemiology; D014825:Vocabulary
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