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Citation |
Gagne JR, Saudino KJ, Asherson P. J. Child Psychol. Psychiatry 2011; 52(11): 1155-1163. |
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Copyright |
(Copyright © 2011, John Wiley and Sons) |
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DOI |
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PMID |
unavailable |
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Abstract |
Background: To investigate links between inhibitory control (IC) and behavior problems in early childhood, as well as genetic and environmental covariances between these two constructs. Methods: Parent and laboratory ratings of IC and parent ratings of externalizing and attention deficit hyperactivity disorder behaviors were administered at 24 months of age on a sample of 291 same‐sex twin pairs (131 monozygotic, 160 dizygotic). Results: There were significant phenotypic associations between both IC assessments and the two areas of behavioral maladjustment (correlations ranged from −.13 to −.57). Multivariate analyses revealed that phenotypic covariance between IC and behavior problems could be substantially explained by common genetic influences (genetic correlations ranged from −.30 to −.74). Parent ratings of IC showed higher phenotypic and genetic correlations with behavior problems than lab ratings of IC. Conclusions: This study is the first to examine the etiology of the covariance between IC and related behavioral difficulties in toddlerhood. Findings suggest that low levels of IC can be considered a genetic risk factor for the development of early emerging behavior problems. |