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Article: Parent ratings of temperament in twins: Explaining the 'too low' DZ correlations

TitleParent ratings of temperament in twins: Explaining the 'too low' DZ correlations
Authors
Issue Date2000
Citation
Twin Research, 2000, v. 3 n. 4, p. 224-233 How to Cite?
AbstractTwin studies of child temperament using objective measures consistently suggest moderate heritability for most dimensions. However, parent rating measures produce unusual patterns of results. Intraclass correlations for identical (MZ) twins are typically high, whereas fraternal (DZ) twin intraclass correlations are much lower than would be predicted from an additive genetic model. The 'too low' DZ correlations can be explained by parent-rating biases that either exaggerate the differences between DZ twins (contrast effects) or that inflate the similarity of MZ twins (assimilation effects), or by the presence of non-additive genetic variance. To evaluate the three possible explanations, we used model-fitting procedures applied to parent-rating data averaged across 14, 20, 24, and 36 months of age in a sample of 196 twin pairs participating in the MacArthur Longitudinal Twin Study. The data were best described by a model that included contrast effects. Implications for non-twin research are discussed.
Persistent Identifierhttp://hdl.handle.net/10722/171900
ISSN
2006 Impact Factor: 1.757
References

 

DC FieldValueLanguage
dc.contributor.authorSaudino, KJen_US
dc.contributor.authorCherny, SSen_US
dc.contributor.authorPlomin, Ren_US
dc.date.accessioned2012-10-30T06:18:18Z-
dc.date.available2012-10-30T06:18:18Z-
dc.date.issued2000en_US
dc.identifier.citationTwin Research, 2000, v. 3 n. 4, p. 224-233en_US
dc.identifier.issn1369-0523en_US
dc.identifier.urihttp://hdl.handle.net/10722/171900-
dc.description.abstractTwin studies of child temperament using objective measures consistently suggest moderate heritability for most dimensions. However, parent rating measures produce unusual patterns of results. Intraclass correlations for identical (MZ) twins are typically high, whereas fraternal (DZ) twin intraclass correlations are much lower than would be predicted from an additive genetic model. The 'too low' DZ correlations can be explained by parent-rating biases that either exaggerate the differences between DZ twins (contrast effects) or that inflate the similarity of MZ twins (assimilation effects), or by the presence of non-additive genetic variance. To evaluate the three possible explanations, we used model-fitting procedures applied to parent-rating data averaged across 14, 20, 24, and 36 months of age in a sample of 196 twin pairs participating in the MacArthur Longitudinal Twin Study. The data were best described by a model that included contrast effects. Implications for non-twin research are discussed.en_US
dc.languageengen_US
dc.relation.ispartofTwin Researchen_US
dc.subject.meshAnalysis Of Varianceen_US
dc.subject.meshAttitudeen_US
dc.subject.meshChild, Preschoolen_US
dc.subject.meshColoradoen_US
dc.subject.meshFemaleen_US
dc.subject.meshGenetic Variation - Geneticsen_US
dc.subject.meshHumansen_US
dc.subject.meshInfanten_US
dc.subject.meshLikelihood Functionsen_US
dc.subject.meshLongitudinal Studiesen_US
dc.subject.meshMaleen_US
dc.subject.meshModels, Geneticen_US
dc.subject.meshObserver Variationen_US
dc.subject.meshParents - Psychologyen_US
dc.subject.meshPersonality Inventoryen_US
dc.subject.meshPhenotypeen_US
dc.subject.meshTemperamenten_US
dc.subject.meshTwins, Dizygotic - Genetics - Psychologyen_US
dc.subject.meshTwins, Monozygotic - Genetics - Psychologyen_US
dc.titleParent ratings of temperament in twins: Explaining the 'too low' DZ correlationsen_US
dc.typeArticleen_US
dc.identifier.emailCherny, SS:cherny@hku.hken_US
dc.identifier.authorityCherny, SS=rp00232en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1375/136905200320565193en_US
dc.identifier.pmid11463143-
dc.identifier.scopuseid_2-s2.0-0034503367en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034503367&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume3en_US
dc.identifier.issue4en_US
dc.identifier.spage224en_US
dc.identifier.epage233en_US
dc.identifier.scopusauthoridSaudino, KJ=7004161005en_US
dc.identifier.scopusauthoridCherny, SS=7004670001en_US
dc.identifier.scopusauthoridPlomin, R=36050187200en_US

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