An expanded Theory of Planned Behaviour (TPB; Ajzen, "Organizational Behavior and Human Decision Processes" 50:179-211, 1991, Ajzen, "Journal of Applied Social Psychology" 32:665-683, 2002) which incorporates affective, moral, and personal belief variables with Ajzen's original social, behavioural, and cognitive factors has not…

Symptoms of attention-deficit/hyperactivity disorder (ADHD) in elementary school-age children are associated with poor relationships with classroom peers, as indicated by poor social preference, low peer support, and peer victimization. Less is known about how friendship patterns relate to ADHD symptoms, or how friendships may buffer risk for…

Cyberbullying has become an important public health issue due to documented associations among victimization, perpetration, and greater likelihood of depression, substance abuse, anxiety, insomnia, and school-related problems for adolescents. Less is known, however, about how youth cope with cyberbullying and the types of services and supports…

Background: Many Canadian schools offer breakfast programs; however, students' engagement in these programs is low, while breakfast skipping is highly prevalent among youth. This study examined whether the availability of breakfast programs supports adolescents' regular breakfast eating, and identified characteristics of breakfast skippers who are…

This study explored cyberbullying and cybervictimization (CBCV), for adolescents aged 11-15 from Tanzania (N = 426) and Canada (N = 592). Measurement invariance and model invariance was found for CBCV. In addition, multigroup structural equation modeling was used to explore several variables: age, gender, average hours online each day, accessing…

We examined the impact of adolescents' popularity motivations on their involvement in relational aggression perpetration and victimization, heavy drinking, and antiauthority behavior, while also considering the role of teens' perception of their own popularity and psychosocial adjustment. High school students (N = 986; 50% female; M[subscript age]…

This study examined how student reports of bullying were related to different dimensions of school climate, at both the school and the student levels, using a contextual effects model in a two-level multilevel modeling framework. Participants included 48,874 secondary students (grades 8 to 12; 24,244 girls) from 76 schools in Western Canada.…

The joint development of trajectories of bullying perpetration and peer victimization from Grade 5 to Grade 8 and concurrent and predictive associations with parent- and child-reported symptoms of psychopathology (anxiety, depression, attention-deficit/hyperactivity disorder, and somatization) were examined in a large sample (N = 695) of Canadian…

This study explored the clinical profiles of 77 female teenager survivors of sexual abuse and examined the association of abuse-related and personal variables with suicidal ideations. Analyses revealed that 64% of participants experienced suicidal ideations. Findings from classification and regression tree analysis indicated that depression,…

The goal of this study was to examine how different types of social experiences in kindergarten relate to Grade 1 academic achievement, while controlling for possible genetic and shared environmental influences through the use of the monozygotic (MZ) twin difference method. Social experiences in kindergarten included relationship quality with the…

This longitudinal study examined psychological integration of women who were homeless at the study's outset. Participants (N = 101) were recruited at homeless shelters and participated in 2 in-person interviews, approximately 2 years apart. A predictive model identifying factors associated with having a psychological sense of community within…

This study examines the role of sex, gender role orientation, social representations of indirect aggression, and indicators of psychosocial adjustment in indirect aggression and victimization in an emerging adult sample. A total of 42 participants (19 men, 23 women) recruited are required to complete the questionnaires, along with 18 participants…

Adolescent females under Child Protective Services care in Quebec, Canada (n = 328) completed a questionnaire designed to explore associations between prior victimization (childhood sexual abuse and four forms of dating violence) and four dimensions of sexual and contraceptive self-efficacy. Five MANCOVAs were performed. In each model, a…

This study investigated whether peer victimization and gender nonconformity are connected for both pre- and early adolescent boys and girls. 462 predominantly white, middle-class students from Grade 5-9 provided self-reports of victimization (physical, verbal, and relational) and gender nonconformity, as well as peer nominations of gender…

This study compared the usefulness of single- and multiple-indicator strategies in a model examining the role of child sexual abuse (CSA) to predict later marital satisfaction through attachment and psychological distress. The sample included 1,092 women and men from a nonclinical population in cohabiting or marital relationships. The single-item…