The present study aimed to examine the longitudinal relationship between social inhibition and behavior problems in preschoolers, as well as the potential moderating role of maternal parenting styles (authoritative, authoritarian, and permissive) in this relationship. A total of 196 preschoolers aged 3-4 years (M[subscript T1] = 3.460, SD = 0.594)…

Given established associations between children's sleep and many outcomes, and the theorized relations between sleep and school functioning, the goal of this study was to examine the relations between children's actigraphy-assessed sleep and school engagement. We used data from a diverse sample of twins (N = 710; Analytic N = 599; M[subscript…

We assessed linkages of mothers' emotion coaching and children's emotion regulation and emotion lability/negativity with children's adjustment in 72 mother-child dyads seeking treatment for oppositional defiant disorder (ODD). Dyads completed the questionnaires and discussed emotion-related family events. Maternal emotion coaching was associated…

Research on sex differences in antisocial behaviour may shed light on the causes of childhood antisocial behaviour. Using a longitudinal design, we tested whether there were sex differences in the amount of harsh discipline children received or in the effect of harsh discipline and whether this accounted for sex differences in later conduct…

The present study examined whether adolescent loneliness would be lower within the context of positive relationships with peers. The core conceptual model predicted that hypothesized links between peer-rated social behaviors or victimization and loneliness would be mediated by social acceptance. Relationship experiences (i.e., social acceptance,…

The goal of this study is twofold: (1) to assess brain anatomical differences between children meeting diagnostic criteria for oppositional defiant disorder (ODD) and healthy controls, and (2) to investigate whether morphological brain characteristics associated with ODD differ in boys and girls. Eight-year-old participants (N = 38) were scanned…

The purpose of the current study was to test a conceptual model of the mediated and moderated associations among shyness, coping strategies, and socioemotional functioning in middle childhood. Participants were 358 children (177 boys) aged 9-13 years (M = 10.16 years, SD = 0.95). Children completed self-report assessments of shyness, coping style…

The present study addresses the influence that group norms exert on individual aggressive and prosocial behavior. The study hypothesis is that for early adolescents who change their peer group affiliations, the characteristics of the group they are leaving (departing-group influence) are not as influential as those of the group that they are…

Scholars have distinguished conceptually between multiple forms of social withdrawal among children and adolescents, but this distinction has yet to be investigated fully during emerging adulthood. Therefore, the overarching goal of this study was to employ a person-oriented approach to examine differences between subtypes of withdrawal on…

The present study examined the influence of children's experiences during non-maternal childcare on their behavior toward unfamiliar peers. Participants included children classified as negatively reactive at four months of age (N = 52) and children not negatively reactive (N = 61), who were further divided into those who experienced non-maternal…

Parental depressive symptomatology has consistently been linked to child maladjustment, but these effects are not universal. This investigation examined the role of child temperament as a moderator of the effects of parental depression on behavior problems in five-year-old children. Parents reported on their own depressive symptoms, and both…

This study examined antisocial and prosocial behavior of N = 439 adolescent athletes between 14 and 17 years of age (67 teams). Multi-level analyses showed that team membership explained 20 and 13 percent of the variance in antisocial and prosocial behavior in the sports context, respectively. The team effects suggest that aggregating antisocial…

The main goal of this study was to examine the direct and moderating effects of trustworthiness and modeling on adolescent siblings' adjustment. Data were collected from 438 families including a mother, a younger sibling in fifth, sixth, or seventh grade (M = 11.6 years), and an older sibling (M = 14.3 years). Respondents completed Web-based…

The current study examined relations among child temperament, peer interaction, and theory of mind (ToM) development. We hypothesized that: (1) children classified as behaviorally inhibited at 24 months would show less ToM understanding at 36 months in comparison to nonbehaviorally inhibited children; (2) children who displayed negative peer…

We set out to explore the meaning of the attachment categories in the Cassidy/Marvin strange situation procedure, as employed in the home, using data from a longitudinal study of children adopted into UK families up to the age of 42 months from Romanian institutions, and of adopted children without the experience of institutional care--both groups…