Piecewise latent growth modeling (PLGM) is a class of longitudinal models using a structural equation modeling framework to describe stage-like, discontinuous change of individuals over time. PLGM breaks the overall time window into non-overlapped segments where separate functions can be fitted to represent differential growth patterns for each…

There has been extensive research into the underrepresentation of minoritized students in STEM disciplines since the 1990s with limited success in improving the representation of Black women in math-intensive STEM fields. This dissertation aims to address how the guiding tenets of critical quantitative (QuantCrit) methods work when used with…

The present study was motivated by the theory-method mismatch between heterotypic continuity (aspects of development that manifest differently across the lifespan thus cannot be measured the same way over time) and longitudinal measurement equivalence (the statistical assumption that the developmental phenomenon studied is measured on the same…

This study examined the relationship of family characteristics (i.e., SES and race), parent-child engagement, and interactive reading behaviors on preschooler's emergent literacy scores. This study used a structural equation model to examine variables that impact emergent literacy development by evaluating data from the Early Childhood…

Social skills and academic competence are key factors influencing children's development and functioning across early childhood and through adolescence. There is a great need to understand the longitudinal patterns of growth in social and academic skills in order to further inform intervention, particularly for at-risk groups such as individuals…

The United States faces high demand for science, technology, engineering, or mathematics (STEM) professionals and a scarce supply of individuals who pursue STEM careers, especially minority populations in the U.S with proficiency in a language other than English. The primary goal of this research was to determine the impact of use of Spanish in…

The under-preparation in math at the high school and college levels, as well as the low participation of ethnically and linguistically diverse individuals in STEM fields are concerning because their preparation for work in these areas is essential for the U.S. to remain competitive in the innovative knowledge economy. While there is now a…

This dissertation empirically tested Tinto's student integration theory through structural equation modeling using a national sample of 2,847 first-time entering community college students. Tinto theorized that the more academically and socially integrated a student is to the college environment, the more likely the student will persist through…

Children with learning disabilities represent the largest category of students served within special education systems in schools, and are at increased risk for academic and psychosocial problems in comparison to peers without learning disabilities. While much of clinical practice and research focus has been on academic interventions,…

College completion is an issue of great concern in the United States, where only 50% of students who start college as freshmen complete a bachelor's degree at that institution within six years. Researchers have studied a variety of factors to understand their relationship to student persistence. Not surprisingly, student characteristics,…

The fact that Latina/o students are losing ground to their non-Latino White peers in four-year college enrollment and bachelor's degree attainment even as Latino college enrollment and graduation rates are at an all time high constitutes a perplexing puzzle. In order to realize the potential "demographic dividend" embedded in the…

Online services (OLS) provide billions of Internet users with a variety of opportunities to exchange goods, share information, and develop or maintain relationships. Popular examples of OLS web sites include eBay.com, Amazon.com, Dell.com, Craigslist.com, MSN.com, Yahoo.com, LinkedIn.com, Zillow.com, Facebook.com, Wikipedia.com, and Twitter.com.…

Drawing on data from the Education Longitudinal Study 2002 (ELS:2002), this study examined psychological factors, student engagement and student achievement in relationship to the process of dropping out. Student engagement has been included in many theoretical models of the dropout process, but few empirical studies have investigated the role of…

Many young children exhibit aggressive and disruptive behaviors at early ages. However, while aggressive behaviors are normative and serve as a way to communicate needs in the midst of developing verbal abilities, continued disruptive behavior can lead to stable or increasing levels of behavioral dysregulation, oppositionality and aggression.…

Hays (1996) was the first to describe the construct of intensive mothering beliefs, yet little empirical research exists to substantiate its prevalence among contemporary mothers and its implications for their lives. The purpose of this study was to examine the construct of intensive mothering beliefs and its longitudinal associations with…