This research was conducted to explore predictors and moderators of bullying involvement, social and emotional problems, vocabulary knowledge, and crimes. There was one main research question: (1) Is there a the relationship between adolescents with social and emotional problems as measured by the SDQ (Goodman, 1997) and adolescents'…

Although longitudinal evidence has linked alcohol use with aggressive behavior during adolescence, most studies have failed to adequately control for the numerous between-individual differences that may underlie this association. In addition, few studies of adolescents have examined whether the nature of the within-individual association between…

Prior work has suggested that inter-parental conflict likely plays an etiological role in child behavior problems. However, family-level measurement of inter-parental conflict in most traditional child twin studies has made it difficult to tease apart the specific causal mechanisms underlying this association. The Children's Perception of…

Bullying is a major concern in schools, yet there has been limited research examining the ways in which students respond to frequent victimization by their peers. The current study explored whether there are discrete groups of children who display similar patterns of responses to frequent bullying. We also examined the associations between the…

Children with an intellectual disability (ID) and/or autism spectrum disorder (ASD) are known to suffer from significantly more sleep problems, anxiety and challenging behaviour (CB) than typically developing children (TD), yet little is known about the relationship between these factors in the child ID/ASD population. The study aim was to examine…

The present study examined relations among sleep, routines, and externalizing behavior (based on parent report) in 115 children ages 6 to 12 years in two groups: 58 children with an autism spectrum disorder (age M = 9.0, SD = 2.09) and 57 non-ASD children (age M = 8.25, SD = 1.98). Within the ASD group, sleep hygiene and sleep quality were related…

The current study used developmental trajectories to examine the relationship between internalising and externalising behaviours and victimisation over the transition period from primary to secondary school. Data were collected using a self-completion questionnaire four times over 3 years from 3,459 students aged 11-14 years. Students were tracked…

There is evidence for co-occurrence of social, emotional and behavioural difficulties (SEBD) and communication/language difficulties in children. Our research investigated the feasibility of vocalisation technology, its combination with observational software and the efficacy of a novel coding scheme and assessment technique. It aimed to…

The current study examined interactions among genetic influences and children's early environments on the development of externalizing behaviors from 18 months to 6 years of age. Participants included 233 families linked through adoption (birth parents and adoptive families). Genetic influences were assessed by birth parent temperamental…

The degree to which experiential avoidance may represent a functional response class was examined by comparing the perseverance of participants displaying high versus low levels of experiential avoidance, as assessed by the Acceptance and Action Questionnaire (Hayes et al., 2004), during a "psychological biathlon" consisting of 2 challenging tasks…

Objective: Iron deficiency is associated with impaired dopaminergic signaling and externalizing behavior. The authors examine, whether iron stores in toddlerhood influence later response to psychostimulants. Method: Youth participating in a study monitoring the long-term safety of risperidone were included in this analysis if they had received…

The current study aimed to examine the relation between experiential avoidance and anxiety disorders, as well as the usefulness of the Avoidance and Fusion Questionnaire for Youth (AFQ-Y; Greco, Lambert, & Baer, 2008) in detecting anxiety disorder in a sample of adolescent inpatients. First, the relation between experiential avoidance and anxiety…

This longitudinal study examined the bidirectional associations between parents' sense of competence and children's externalizing problems, mediation of these associations by parenting behaviors, and differences between mothers and fathers concerning these associations. A sample of 551 families with children (49.9% girls; mean age = 7.83 years, SD…

This study examined relationships between parent-child emotional communication and callous-unemotional (CU) traits and conduct problems. References to negative and positive emotions made by clinic-referred boys (3-9 years) and their parents were coded from direct observations of family interactions involving the discussion of shared emotional…

Several researchers have argued that the functional behavior assessment (FBA) and behavior intervention plan (BIP) mandates in the Individuals With Disabilities Education Act of 2004 have gone beyond the current research base. For instance, although BIPs have been shown to improve student outcomes when implemented with strict control and oversight…