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Now showing items 1-10 of 11
Friendships and deviancy training in young children
(Emerald, 2015-04-13)
Purpose
The purpose of this study was to test a new approach to deviancy training, that is, the shaping and reinforcing of disruptive behaviors in social interaction, which considers not only reinforcement, but also the ...
Links between friends' physical aggression and adolescents' physical aggression : what happens if gene-environment correlations are controlled?
(Sage, 2016-05)
Exposure to deviant friends has been found to be a powerful source of influence on children’s and adolescents’ aggressive behavior. However, the contribution of deviant friends may have been overestimated because of a ...
Early warm-rewarding parenting moderates the genetic contributions to callous-unemotional traits in childhood
Warm-rewarding genetic callous-unemotional
(Wiley, 2018-04-23)
Background
Previous gene–environment interaction studies of CU traits have relied on the candidate gene approach, which does not account for the entire genetic load of complex phenotypes. Moreover, these studies have not ...
A longitudinal twin study of callous-unemotional traits during childhood
Longitudinal twin callous-unemotional, 1
(American Psychological Association, 2018-05)
Previous research indicates that genetic factors largely account for the stability of callous-unemotional (CU) traits in adolescence. However, the genetic-environmental etiology of the development of CU traits has not been ...
The expression of genetic risk for aggressive and non-aggressive antisocial behavior is moderated by peer group
(Springer, 2015-07)
Numerous studies have shown that aggressive and non-aggressive antisocial behaviors are important precursors of later adjustment problems. There is also strong empirical evidence that both types of antisocial behavior are ...
The genetic and environmental etiology of the association between vocabulary and syntax in first grade
Etiology of vocabulary and syntax
(Taylor & Francis, 2018-03-09)
This study examined the genetic and environmental etiology of vocabulary, syntax, and their association in first graders. French-speaking same-sex twins (N = 555) completed two vocabulary tests, and two scores of syntax ...
Twin classroom dilemma : to study together or separately?
(American Psychological Association, 2018-07)
There is little research to date on the academic implications of teaching twins in the same or different classroom. Consequently, it is not clear whether twin classroom separation is associated with positive or negative ...
Heterogeneity in the development of proactive and reactive aggression in childhood : Common and specific genetic-environmental factors
(Public Library of Science, 2017-12-06)
Background
Few studies are grounded in a developmental framework to study proactive and reactive aggression. Furthermore, although distinctive correlates, predictors and outcomes have been highlighted, proactive and reactive ...
Persistent genetic and family-wide environmental contributions to early number knowledge and later achievement in mathematics
Etiology of early math knowledge and skills development
(SAGE, 2017-10-03)
This study investigated the stable and transient genetic and environmental contributions to
individual differences in number knowledge in the transition from preschool (age 5) to Grade 1
(age 7) and to the predictive ...
Persistence and innovation effects in genetic and environmental factors in negative emotionality during infancy : a twin study
(Public Library of Science, 2017-04-27)
Background
Difficult temperament in infancy is a risk factor for forms of later internalizing and externalizing
psychopathology, including depression and anxiety. A better understanding of the roots
of difficult temperament ...