The present study investigates the influence of multidimensionality on linking and equating in a unidimensional IRT. Two hypothetical multidimensional scenarios are explored under a nonequivalent group common-item equating design. The first scenario examines test forms designed to measure multiple constructs, while the second scenario examines a…

Higher levels of student achievement are required to meet the needs of a changing workforce. The effect increases in education spending have on student learning gains among algebra students in Florida was unknown. Most research on per-pupil funding and student achievement is qualitative and measures opinions on the long-term effects of increased…

In this dissertation, I examine how fingerspelled words and core signs in American Sign Language (ASL) reduce as they are repeated. This investigation is motivated by theories of language production that posit that reduction may be shaped not only by reducing articulatory effort, but also by accommodation to an interlocutor's understanding of the…

In conducting confirmatory factor analysis with ordered response items, the literature suggests that when the number of responses is five and item skewness (IS) is approximately normal, researchers can employ maximum likelihood with robust standard errors (MLR). However, MLR can yield biased factor loadings (FL) and FL standard errors (FLSE) when…

The problem is staff fear being involved in the next campus shooting, which has pushed campus safety experts to update safety policies and procedures. One of the policies being addressed is the option of allowing concealed carry on campus (CCOC). However, allowing CCOC makes some staff feel less safe. The purpose of this causal-comparative study…

This dissertation is about the learnability of different generative, Separationist approaches to nominal morphosyntax. The core of my investigation is number, gender, and declension class, as manifested across nouns, adnominals (adjectives, numerals, demonstratives, and quantifiers), and articles. An extreme position would require that all of…

Fewer than 10% of private and public school teachers implement instructional innovation following professional development sessions (Spelman et al., 2016). This qualitative interpretive phenomenological study addressed the problem of private school teachers' desires for effective professional development to improve student learning outcomes. The…

This three-article dissertation aims to address three methodological challenges to ensure comparability in educational research, including scale linking, test equating, and propensity score (PS) weighting. The first study intends to improve test scale comparability by evaluating the effect of six missing data handling approaches, including…

Binary item response theory (IRT) models are widely used in educational testing data. These models are not perfect because they simplify the individual item responding process, ignore the differences among different response patterns, cannot handle multidimensionality that lay behind options within a single item, and cannot manage missing response…

In response to legislation from the federal government and the rising number of ELs in public schools many school districts are searching for ways to ensure ELs are making adequate progress on English proficiency. The problem is defining the best method for teaching ELs in the mainstream classroom is difficult. The current gap in educational…

This study focused on the problem that students attending on-ground programs retain significantly higher than students in online programs. The purpose of this quantitative causal-comparative study was to determine what difference, if any, existed in the grades and persistence of adult online students who used student support services and those who…

Despite the increasing demand for diagnostic information, observed subscores have been often reported to lack adequate psychometric qualities such as reliability, distinctiveness, and validity. Therefore, several statistical techniques based on CTT and IRT frameworks have been proposed to improve the quality of subscores. More recently, DCM has…

Learning analytics researchers have been diligently integrating trace data to study Self-Regulated Learning (SRL). Compared to traditionally used survey data, trace data, such as log or clickstream data designed and interpreted to understand a certain SRL construct, are considered to be more effective in capturing dynamic SRL as fine-grained…

As new generations arrive to leadership positions within the higher education arena, there are new opportunities to conduct further research and expand on what has been previously published on leadership and generational cohorts. The purpose of this quantitative, causal-comparative study was to examine if and to what extent there was an effect of…

Since corpus linguistics gained popularity as a methodology in the latter half of the 20th century, second language acquisition research has seen the emergence of work investigating formulaic language, such as idioms, lexical bundles, and collocations. A collocation is a string of words that co-occur more routinely than probability would predict,…