Jennifer D. Shapka

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BACKGROUND Current health literature suggests that there has been a decline in the age of pubertal onset, and that pubertal development is influenced by social context. Unfortunately, contemporary Canadian-specific data have not been available. This study examined the odds of having entered puberty at various ages during adolescence, before and after(More)
This study evaluated the psychometric properties of a newly developed adolescent-reported domain-specific measure of parental behavioral control. In addition, this study examined the relationships between domains of perceived behavioral control and adolescent problem behaviors and tested whether psychological control played a mediating role in these(More)
BACKGROUND This study examined the effects of maternal anger, partner transitions and partner conflict on later oppositional and angry behavior of the children of teenage mothers. METHODS One hundred and twenty-one teenage women were interviewed prior to the birth of the baby and at 3 points subsequently, when children were newborn, 7 years old and 12(More)
In this international, longitudinal study, we explored gender differences in, and gendered relationships among, math-related motivations emphasized in the Eccles (Parsons) et al. (1983) expectancy-value framework, high school math participation, educational aspirations, and career plans. Participants were from Australia, Canada, and the United States (Ns =(More)
Cyberbullying has become a growing concern for adolescents. This study examined differences in cyber-aggression for 518 Canadian adolescents of either East Asian or European descent (61% female; M age = 15.24; SD = 1.68). Associations between parenting behaviors (parental control, parental solicitation, and child disclosure) and engagement in(More)
This study examined reciprocal relationships between adolescents' perceptions of parental nurturance and two types of adolescent aggressive behaviors (indirect and direct aggression) using a transactional model. Three waves of longitudinal data were drawn from the Canadian National Longitudinal Survey of Children and Youth. The sample included 1,416 (735(More)