Now showing items 21-30 of 32
Twin’s birth-order differences in height and body mass index from birth to old age: a pooled study of 26 twin cohorts participated in the CODATwins project
(Australian Academic Press, 2016-04)
We analyzed birth order differences in means and variances of height and body mass index (BMI) in monozygotic (MZ) and dizygotic (DZ) twins from infancy to old age. The data were derived from the international CODATwins ...
Does cortisol moderate the environmental association between peer victimization and depression symptoms? a genetically informed twin study
Many youths who are victimized by peers suffer from depression symptoms. However, not all bullying victims become depressed and individuals’ biological sensitivity may play an important moderating role in this regard. ...
Persistent genetic and family-wide environmental contributions to early number knowledge and later achievement in mathematics
Etiology of early math knowledge and skills development
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 ...
Environmental influence of problematic social relationships on adolescents' daily cortisol secretion : a monozygotic twin-difference study
(Cambridge University Press, 2017-02)
BACKGROUND: This study investigated the potential environmental effects of peer victimization and the quality of relationships with parents and friends on diurnal cortisol secretion in mid-adolescence. METHOD: ...
Serotonin transporter promoter methylation in peripheral cells and neural responses to negative stimuli : a study of adolescent monozygotic twins
(Springer Nature, 2018-08-08)
Several studies have examined associations between peripheral DNA methylation patterns of the serotonin transporter gene (SLC6A4) promoter and symptoms of depression and anxiety. The SLC6A4 promoter methylation has also ...
The dark side of friends : a genetically informed study of victimization within early adolescents’ friendships
(Taylor & Francis, 2015)
Using a genetically informed twin design, this study examined (a) whether, in line with gene–environment correlation (rGE), a genetic disposition for anxiety puts children at risk of being victimized by a close friend or ...
Associations between mother-child relationship quality and adolescent adjustment : using a genetically controlled design to determine the direction and magnitude of effects
This study used a genetically controlled design to examine the direction and the magnitude of effects in the over-time associations between perceived relationship quality with mothers and adolescent maladjustment (i.e., ...
Links between the mother-adolescent and father-adolescent relationships and adolescent depression : a genetically informed study
Links between the parent-adolescent Relationship quality and depression
(Taylor & Francis, 2017-08-18)
This study examined the unique roles of support and conflict in the relationship with the mother and the father in predicting changes in adolescents’ depressive symptoms over a 1- year period. Potential moderating effects ...
Evidence of a unique and common genetic etiology between the CAR and the remaining part of the diurnal cycle : a study of 14 year-old twins
Introduction By and large, studies have reported moderate contributions of genetic factors to cortisol secreted in the early morning and even smaller estimates later in the day. In contrast, the cortisol awakening ...
Genetic and environmental influences on developmental trajectories of adolescent alcohol use
Adolescent alcohol use demonstrates distinct developmental trajectories with different times of onset, levels, and rates of growth. Twin research on adolescent alcohol use has shown that genetic influences are consistent ...