The intellectually gifted have been found to have higher levels of many prosocial dispositions, but there is limited evidence of increased prosocial behavior. The present research used existing and original datasets to examine relations between intellectual giftedness and prosocial behavior and dispositions. In Study 1, those identified as…

Many developmental theories have not been sufficiently evaluated using designs that control for unobserved familial confounds. Our long-term goal is to determine the causal structure underlying associations between early environmental conditions and later psychosocial and health outcomes. Our overall objective in this study was to further evaluate…

Bullying is widely prevalent in the US. Although anti-bullying laws have been implemented across the country since 1999, bullying prevalence rates remain high. Research suggests that being a bully or a bully victim or both makes an individual more likely to experience worse physical, mental, and financial health. This dissertation comprises of…

Differentiation of intelligence refers to changes in the structure of intelligence that depend on individuals' level of general cognitive ability (ability differentiation hypothesis) or age (developmental differentiation hypothesis). The present article aimed to investigate ability differentiation, developmental differentiation, and their…

Children of teen mothers have worse academic, labor market, and behavioral outcomes in the United States, but it is not clear whether these poor outcomes are caused by having a young mother or driven by selection into teen motherhood. Understanding the reasoning behind poor child outcomes is important for designing effective policies to improve…

Mastery involves a sense of having control over one's surroundings and an ability to accomplish meaningful goals and determine important meaningful outcomes across situations. Mastery is a dynamic, learned resource that has implications for mental health. Although mastery is known to be influenced by exposure to family members (i.e., parental…

As young people progress with their education and their early careers, they find themselves pushed forward or held back at critical junctures without full regard for their individual capabilities. Their paths are too often defined less by their talents and more by characteristics such as their race/ethnicity, gender, and socioeconomic or class…

Longitudinal research is often interested in identifying correlates of heterogeneity in change. This paper compares three approaches for doing so: the mixed-effects model (latent growth curve model), the growth mixture model, and structural equation model trees. Each method is described, with special focus given to how each structures…

Given the questionnaire design and the nature of the problem, partially ordered data that are neither completely ordered nor completely unordered are frequently encountered in social, behavioral, and medical studies. However, early developments in partially ordered data analysis are very limited and restricted only to cross-sectional data. In this…

The aim of the OECD Career Readiness project is to identify patterns of teenage attitudes and activities that are associated with better transitions into employment by analysing multiple national longitudinal datasets. This paper looks for further evidence of the link between teenage activities, experiences and career-related thinking and adult…

Although a small body of research suggests that emotional engagement with school is related to youth behavioral and psychological outcomes, it remains unclear whether these associations represent causal relationships and at what age engagement matters most for student outcomes. Using data from two large, national surveys, this study uses three…

Family structure changes experienced by children are likely to shape their transitions into young adulthood, including the formation of their own romantic relationships. This study examined links between children's family structure trajectories from childhood through adolescence and their timing of entry into cohabitation as young adults, a…

The NLSY97 data were used to explore the patterns of developmental trajectories of body weight in adolescence and how they affected the likelihood of college completion in young adulthood among 2,275 youths aged 13 and 14 in Wave 1. A strong weight trajectory gradient was found for rates of college completion. The study further explored the role…

The children of teen mothers are at elevated risk for becoming teen parents themselves. The current study aimed to identify how levels of mothers' education were associated with risk of teenage childbearing for children of teen versus nonteen mothers. Through structural equation modeling, we tested whether children's environmental and personal…

Using data from the National Longitudinal Survey of Youth of 1979, this article examines the relationship between adolescents' educational and occupational expectations, and how they correspond to their subsequent labor market outcomes in adulthood. We show that over-aligned adolescents, those who expect to obtain more education than is necessary…