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…

The superintendency can be stressful, and increasingly some individuals are superintendents for more than one district. This mixed methods study focuses on the shared superintendency and stress drawing on a combination of the Perceived Stress Scale (PSS) and follow up interviews. While no statistically significant difference between single…

This study examines the visual design processes and strategies used by graphic design experts and non-design college students when applying visual design principles to compose an infographic. The focus is on the visual design stage, often reported as challenging for adult and young students (e.g., Fragou & Papadopoulou, 2020; O'Mahony et al.,…

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…

Language production and the execution of motor acts have long been thought to have similarities in the rules of their execution. Recent studies have begun to directly compare these two processes by measuring certain phenomena found in both. Until now, comparisons have only been made in parallel, with different groups of participants and/or tasks.…

The problem addressed in this comparative case study was to understand the creation and implementation of the medical withdrawal policy and differences of the return from withdrawal policies in the University State System in the context of students with severe and persistent mental illness. This study focused on two specific institutions in the…

In this three-paper dissertation, I examine three seemingly unconnected historical philosophers--Locke, Cockburn, and Kant--on questions concerning moral knowledge, human nature, and moral development. In the first chapter, my focus is on Locke's peculiar claim that a demonstrative science of morality is possible, and I address an interpretive…

Instruction, designed to impact learning, accentuates the quantity and quality of learner interactions. Theoretically, the higher the level or quantity of learner interaction within instruction, the higher the quality of instruction. Learner interactions are fostered through learner-to-learner (L2L), learner-to-instructor (L2I), and…

This quantitative study examined the impact school mentors have on the attendance of 15 male fourth and fifth grade students. Student attendance data were collected to compare the students' absences in the 2021-2022 school year versus the 2022-2023 school year. This data was analyzed to determine whether there was a difference in the attendance…

This dissertation explores the impact of mindful meditation on imaging students, aiming to determine whether meditation practices can enhance students' overall outlook and mood amidst the numerous stressors encountered within their academic program. Imaging students often face high-pressure situations, including the emotional toll of caring for…

The use of Mixed Methods (MM) in evaluation has increasingly become a valuable asset in evaluators' methodological toolbox. Despite prolific research on various aspects of mixed methods, from typologies to ontological debates, there remains a dearth of empirically derived evidence on effectively communicating MM findings. This lack of empirical…

Intelligence tests have been used in the United States since the early 1900s for assessing soldiers during World War I (Kaufman & Harrison, 2008; White & Hall, 1980). Presently, cognitive assessments are used in school, civil service, military, clinical, and industry settings (White & Hall, 1980). Although the results of these…

This dissertation compares the performance of equivalence test (EQT) and null hypothesis test (NHT) procedures for identifying invariant and noninvariant factor loadings under a range of experimental manipulations. EQT is the statistically appropriate approach when the research goal is to find evidence of group similarity rather than group…

The visual system is tuned by its inputs. The behavior of reading offers a unique way to examine tuning for visual representations (letters) because readers have massive experience recognizing letters in a systematic context (reading). One aspect of reading is that letters are highly crowded within words, which severely limits their…

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…