A genetically informed longitudinal study of early-life temperament and childhood aggression / Eric N. PENICHET in Development and Psychopathology, 37-2 (May 2025)  

Public ISBD [article]  inDevelopment and Psychopathology > 37-2 (May 2025) . - p.779-801 Titre : A genetically informed longitudinal study of early-life temperament and childhood aggression Type de document : Texte imprimé et/ou numérique Auteurs : Eric N. PENICHET, Auteur ; Christopher R. BEAM, Auteur ; Susan E. LUCZAK, Auteur ; Deborah W. DAVIS, Auteur Article en page(s) : p.779-801 Langues : Anglais (eng) Mots-clés : aggression  behavior genetics  childhood  externalizing behavior  temperament Index. décimale : PER Périodiques Résumé : The present study examined the longitudinal associations between three dimensions of temperament - activity, affect-extraversion, and task orientation - and childhood aggression. Using 131 monozygotic and 173 dizygotic (86 same-sex) twin pairs from the Louisville Twin Study, we elucidated the ages, from 6 to 36 months, at which each temperament dimension began to correlate with aggression at age 7. We employed latent growth modeling to show that developmental increases (i.e., slopes) in activity were positively associated with aggression, whereas increases in affect-extraversion and task orientation were negatively associated with aggression. Genetically informed models revealed that correlations between temperament and aggression were primarily explained by common genetic variance, with nonshared environmental variance accounting for a small proportion of each correlation by 36 months. Genetic variance explained the correlations of the slopes of activity and task orientation with aggression. Nonshared environmental variance accounted for almost half of the correlation between the slopes of affect-extraversion and aggression. Exploratory analyses revealed quantitative sex differences in each temperament-aggression association. By establishing which dimensions of temperament correlate with aggression, as well as when and how they do so, our work informs the development of future child and family interventions for children at highest risk of aggression. En ligne : https://dx.doi.org/10.1017/S0954579424000634 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=552 [article] A genetically informed longitudinal study of early-life temperament and childhood aggression [Texte imprimé et/ou numérique] / Eric N. PENICHET, Auteur ; Christopher R. BEAM, Auteur ; Susan E. LUCZAK, Auteur ; Deborah W. DAVIS, Auteur . - p.779-801. Langues : Anglais (eng) in Development and Psychopathology > 37-2 (May 2025) . - p.779-801 Mots-clés : aggression  behavior genetics  childhood  externalizing behavior  temperament Index. décimale : PER Périodiques Résumé : The present study examined the longitudinal associations between three dimensions of temperament - activity, affect-extraversion, and task orientation - and childhood aggression. Using 131 monozygotic and 173 dizygotic (86 same-sex) twin pairs from the Louisville Twin Study, we elucidated the ages, from 6 to 36 months, at which each temperament dimension began to correlate with aggression at age 7. We employed latent growth modeling to show that developmental increases (i.e., slopes) in activity were positively associated with aggression, whereas increases in affect-extraversion and task orientation were negatively associated with aggression. Genetically informed models revealed that correlations between temperament and aggression were primarily explained by common genetic variance, with nonshared environmental variance accounting for a small proportion of each correlation by 36 months. Genetic variance explained the correlations of the slopes of activity and task orientation with aggression. Nonshared environmental variance accounted for almost half of the correlation between the slopes of affect-extraversion and aggression. Exploratory analyses revealed quantitative sex differences in each temperament-aggression association. By establishing which dimensions of temperament correlate with aggression, as well as when and how they do so, our work informs the development of future child and family interventions for children at highest risk of aggression. En ligne : https://dx.doi.org/10.1017/S0954579424000634 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=552

How nonshared environmental factors come to correlate with heredity / Christopher R. BEAM in Development and Psychopathology, 34-1 (February 2022)  

Public ISBD [article]  inDevelopment and Psychopathology > 34-1 (February 2022) . - p.321-333 Titre : How nonshared environmental factors come to correlate with heredity Type de document : Texte imprimé et/ou numérique Auteurs : Christopher R. BEAM, Auteur ; Patrizia PEZZOLI, Auteur ; Jane MENDLE, Auteur ; S. Alexandra BURT, Auteur ; Michael C. NEALE, Auteur ; Steven M. BOKER, Auteur ; Pamela K. KEEL, Auteur ; Kelly L. KLUMP, Auteur Article en page(s) : p.321-333 Langues : Anglais (eng) Mots-clés : affect  developmental behavioral genetics  gene?environment interplay  longitudinal modeling  mood Index. décimale : PER Périodiques Résumé : Conventional longitudinal behavioral genetic models estimate the relative contribution of genetic and environmental factors to stability and change of traits and behaviors. Longitudinal models rarely explain the processes that generate observed differences between genetically and socially related individuals. We propose that exchanges between individuals and their environments (i.e., phenotype?environment effects) can explain the emergence of observed differences over time. Phenotype?environment models, however, would require violation of the independence assumption of standard behavioral genetic models; that is, uncorrelated genetic and environmental factors. We review how specification of phenotype?environment effects contributes to understanding observed changes in genetic variability over time and longitudinal correlations among nonshared environmental factors. We then provide an example using 30 days of positive and negative affect scores from an all-female sample of twins. Results demonstrate that the phenotype?environment effects explain how heritability estimates fluctuate as well as how nonshared environmental factors persist over time. We discuss possible mechanisms underlying change in gene?environment correlation over time, the advantages and challenges of including gene?environment correlation in longitudinal twin models, and recommendations for future research. En ligne : http://dx.doi.org/10.1017/s0954579420001017 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=474 [article] How nonshared environmental factors come to correlate with heredity [Texte imprimé et/ou numérique] / Christopher R. BEAM, Auteur ; Patrizia PEZZOLI, Auteur ; Jane MENDLE, Auteur ; S. Alexandra BURT, Auteur ; Michael C. NEALE, Auteur ; Steven M. BOKER, Auteur ; Pamela K. KEEL, Auteur ; Kelly L. KLUMP, Auteur . - p.321-333. Langues : Anglais (eng) in Development and Psychopathology > 34-1 (February 2022) . - p.321-333 Mots-clés : affect  developmental behavioral genetics  gene?environment interplay  longitudinal modeling  mood Index. décimale : PER Périodiques Résumé : Conventional longitudinal behavioral genetic models estimate the relative contribution of genetic and environmental factors to stability and change of traits and behaviors. Longitudinal models rarely explain the processes that generate observed differences between genetically and socially related individuals. We propose that exchanges between individuals and their environments (i.e., phenotype?environment effects) can explain the emergence of observed differences over time. Phenotype?environment models, however, would require violation of the independence assumption of standard behavioral genetic models; that is, uncorrelated genetic and environmental factors. We review how specification of phenotype?environment effects contributes to understanding observed changes in genetic variability over time and longitudinal correlations among nonshared environmental factors. We then provide an example using 30 days of positive and negative affect scores from an all-female sample of twins. Results demonstrate that the phenotype?environment effects explain how heritability estimates fluctuate as well as how nonshared environmental factors persist over time. We discuss possible mechanisms underlying change in gene?environment correlation over time, the advantages and challenges of including gene?environment correlation in longitudinal twin models, and recommendations for future research. En ligne : http://dx.doi.org/10.1017/s0954579420001017 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=474

Phenotype–environment correlations in longitudinal twin models / Christopher R. BEAM in Development and Psychopathology, 25-1 (February 2013)  

Public ISBD [article]  inDevelopment and Psychopathology > 25-1 (February 2013) . - p.7-16 Titre : Phenotype–environment correlations in longitudinal twin models Type de document : Texte imprimé et/ou numérique Auteurs : Christopher R. BEAM, Auteur ; Eric TURKHEIMER, Auteur Article en page(s) : p.7-16 Index. décimale : PER Périodiques Résumé : Gene–environment correlation (rGE) exists both within and between families. Between families, accumulating rGE has been used to explain dramatic changes in phenotypic means over time. The Dickens and Flynn model of increases in cognitive ability over generational time, for example, suggests that small changes in phenotype can lead to subsequent reallocation of environmental resources. This process sets up a reciprocal feedback loop between phenotype and environment, producing accumulating rGE that can cause large changes in the mean of ability, even though ability remains highly heritable in cross-sectional data. We report simulations suggesting that similar processes may operate within twin and sibling pairs. Especially in dizygotic twins and siblings, small differences in phenotype can become associated with reallocations of environmental resources within families. We show that phenotype–environment effects can account for age-related increases in rGE, rapid differentiation of siblings raised together, and widely reported increases in the heritability of behavior during childhood and adolescence. En ligne : http://dx.doi.org/10.1017/S0954579412000867 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=190 [article] Phenotype–environment correlations in longitudinal twin models [Texte imprimé et/ou numérique] / Christopher R. BEAM, Auteur ; Eric TURKHEIMER, Auteur . - p.7-16. in Development and Psychopathology > 25-1 (February 2013) . - p.7-16 Index. décimale : PER Périodiques Résumé : Gene–environment correlation (rGE) exists both within and between families. Between families, accumulating rGE has been used to explain dramatic changes in phenotypic means over time. The Dickens and Flynn model of increases in cognitive ability over generational time, for example, suggests that small changes in phenotype can lead to subsequent reallocation of environmental resources. This process sets up a reciprocal feedback loop between phenotype and environment, producing accumulating rGE that can cause large changes in the mean of ability, even though ability remains highly heritable in cross-sectional data. We report simulations suggesting that similar processes may operate within twin and sibling pairs. Especially in dizygotic twins and siblings, small differences in phenotype can become associated with reallocations of environmental resources within families. We show that phenotype–environment effects can account for age-related increases in rGE, rapid differentiation of siblings raised together, and widely reported increases in the heritability of behavior during childhood and adolescence. En ligne : http://dx.doi.org/10.1017/S0954579412000867 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=190

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