In recent years, discussion of the limitations of the standard cross-lagged panel model (CLPM) has increased, and the random intercept cross-lagged panel model (RI-CLPM) has been proposed as an improved approach to modeling. By now, there are some first applications of the model to investigate reciprocal relations in self-concept development.…

The Center for Gifted Education (Center) at William & Mary has provided diverse enrichment programs for high-ability students since 1988. With an aspiration to serve financially disadvantaged students, the Center developed and hosted a summer residential enrichment program in STEM areas. Camp Launch, for low-income, high-ability middle school…

Maintaining adolescents' engagement with STEM (science, technology, engineering, and math) in and out of school may help ensure that adolescents are prepared to enter the STEM workforce. This study aims to extend prior work by documenting internal and external factors that matter for both STEM class engagement as well as engagement with STEM…

Bullying behaviours are shown to be associated with symptoms of affective disorder; however, there is limited evidence of these associations in a Canadian high school context. We sought to examine the relationship between psychosocial characteristics of high school youth, their bullying involvement, and their self-reported symptoms of anxiety and…

In this article, a heterogeneous latent growth curve model for modeling heterogeneity of growth rates is proposed. The suggested model is an extension of a conventional growth curve model and a complementary tool to mixed growth modeling. It allows the modeling of heterogeneity of growth rates as a continuous function of latent initial status and…