This dissertation consists of three chapters that contribute to the fields of macroeconomics, economic development, and entrepreneurship. In the first chapter, "Entrepreneurship Selection and Performance in the U.S. and Across Countries: The Role of Human Capital," I seek to establish a set of stylized facts related to entrepreneurship…

Instructional designers make numerous decisions daily to perform their job, for example, what authoring tool to use, what model or strategy to use, and what design process to use to develop learning solutions. Decision-making is important in the field of instructional design. The literature revealed many factors or variables instructional…

This dissertation examined classification outcome differences among four popular individual supervised machine learning (ISML) models (logistic regression, decision tree, support vector machine, and multilayer perceptron) when predicting minor class membership within imbalanced datasets. The study context and the theoretical population sampled…

When measuring latent constructs, for example, language ability, we use statistical models to specify appropriate relationships between the latent construct and observe responses to test items. These models rely on theoretical assumptions to ensure accurate parameter estimates for valid inferences based on the test results. This dissertation…

This quantitative study investigates the predictive power of machine learning (ML) models on degree completion among adult learners in higher education, emphasizing the enhancement of data-driven decision-making (DDDM). By analyzing three ML models - Random Forest, Gradient-Boosting machine (GBM), and CART Decision Tree - within a not-for-profit,…

The Q-diffusion model is a cognitive process model that considers decision making as an unobservable information accumulation process. Both item and person parameters decide the trace line of the cognitive process, which further decides observed response and response time. Because the likelihood function for the Q-diffusion model is intractable,…

A recent phenomenon within the Deaf Indonesian communities brings up the debate of capitalization to the forefront; here the issue is of capitalizing "Tuli", which appears to reflect Western Deaf tradition's influence, instead of using "tuli". This issue led to this study on Tuli Indonesian identity. The data is based on the…

With the rise in popularity of social media and e-commerce platforms, "discrete math" is at the heart of our online experiences, playing a front-end role in the recommendation of what to click, watch, or buy, or who to follow or friend, as well as a back-end role in data storage, access, and transfer. This thesis focuses on two such…

All of our choices and all that sets us apart are governed by what we can do, what we want to do, and what we know. This dissertation aims to quantify two of these channels to better understand why we differ. The first two chapters focus on what we know and how it shapes societal gaps. The first chapter attacks the question of how much of the gap…

In this dissertation, I establish a research program that uses computational modeling as a testbed for theories of phonological learning. This dissertation focuses on a fundamental question: how do children acquire sound patterns from noisy, real-world data, especially in the presence of lexical exceptions that defy regular patterns? For instance,…

While language aptitude and motivation are considered to be important contributors to second language (L2) attainment, two major gaps in the past research have been (1) a lack of nonlinear models stemming from a naive and tacit assumption that learning outcomes are linearly related to their predictors, and (2) a lack of unified and integrative…

The digital age and global technological advancement have brought about unprecedented changes in a wide range of global sectors. The educational sector, as a sector that produces a wide range of professionals, necessitates numerous changes and advancements in educational administration. The introduction and integration of boot camps is one method…

Despite the efforts of traditional and alternative teacher education programs (i.e. pre-service teacher education) in the United States, teachers frequently report feeling unprepared by the time they begin teaching full time in the classroom. Teachers with low levels of self-efficacy are correlated with lower job satisfaction, higher levels of…

Although graduate-educated engineers are essential for the professoriate, technological advancement, and the growth of the U.S. economy, there is concern about the shortage of future PhD-holding engineers pursuing careers in academia and industry. This shortage relates, in part, to high levels of attrition among engineering graduate students. It…

Sexual assault of women is common on college campuses, but the vast majority of victims do not make a formal report. It is imperative to understand these decisions to help design and implement policies to normalize and encourage reporting. This study aimed to extend science on the thematic reasons for non-reporting by (1) establishing validity for…