Digital Commons Network^™

Vergence Task-Based Neural Pathways With Binocularly Normal Vision And Comorbid Persistent Post-Concussive Symptoms -Convergence Insufficiency, Ayushi Sangoi

Dissertations

Binocular dysfunctions are more prevalent in the persistent post-concussive symptoms (PPCS) population than in the general population. The most prevalent binocular disorder is convergence insufficiency (CI), affecting 3-17% of the general population and up to 10 times as many people with PPCS. CI makes it difficult to fuse or maintain fusion on targets at near, and its symptoms include double or blurry vision and headaches when performing close-range tasks such as reading, which can exacerbate PPCS symptoms. Given controversy over the subjectivity and effectiveness of diagnostic tools and symptom surveys for both PPCS and CI, understanding why CI has high …

Significant Crash Characteristics Associated With E-Scooter And E-Bike Crashes, Aimee Jefferson

Dissertations

Micromobility devices—namely e-scooters and e-bikes—have rapidly gained popularity in the United Sates, rising from 35 million annual shared rides in 2017 to over 133 million in 2023 (NACTO 2024). But also increasing is the number of injuries associated with these devices; however, most research emphasizes injury and demographic patterns rather than crash characteristics that would inform prevention strategies. Most existing crash research also relies on small sample sizes, lacks nuance distinguishing between involved parties (motorists, pedestrians, single device), and fails to distinguish between bicycle and micromobility crash patterns despite micromobility devices often being instructed to use conventional bicycle facilities. These …

Anonymity And Accountability In Secure Messaging, Erin Kenney

Dissertations

Encypted messaging has become more and more prevalent as time moves on, and its benefits in assuring privacy cannot be overstated, but it also brings along with it concerns on how to moderate platforms where all messages are hidden. Message Franking, followed by Traceback systems, addressed these concerns by allowing the sender of a message to be proven when reported, even for forwarded messages in the case of Traceback, however these systems damage the privacy guarantees that originally motivated encrypted messaging to begin with.

In practice, even without those concerns encrypted messaging alone is not enough to prevent the most …

Reclamando Corazón Y Voz: Latinas Speak Their Truth Through Plática As Resistance In California Community College Learning Disabilities Assessments, Maricela Becerra

Dissertations

Although California Community Colleges (CCCs) offer learning disability (LD) assessments to determine eligibility for academic accommodations, for Latina students navigating converging forces of race, gender, language, citizenship, and ableism, these assessments often surface unspoken histories of harm. This study advanced Chicana feminista DisCrit (CFDC), extending disability critical race theory through Chicana spirituality and cultural intuition to examine possibilities when an educadora situates assessments in a plática grounded in consideración—respectful, relational, and unhurried care.

Rooted in Chicana feminist pláticas methodology and authored from the positionality of a disabled Latina scholar–practitioner, this qualitative decolonial dissertation explored how Latina students reflected on …

Generative Ai And Student Engagement, Motivation, And Learning: Exploring The Use Of Generative Ai In Higher Education Online Courses, Jeffrey L. Simmons

Dissertations

ABSTRACT

The rapid emergence of Generative AI (GenAI) large language models (LLMs) such as ChatGPT in higher education has left many institutions unprepared to assess their potential benefits and risks. This mixed-methods study examined how ChatGPT and Google’s NotebookLM were integrated into online course development and delivery at a small private nonprofit university in California, and assessed their perceived impact on student engagement, motivation, and learning.

Data were collected from post-course Likert-scale surveys completed by students across three online master’s-level courses and from pre-course prediction surveys by instructors in the two NotebookLM courses. Quantitative analyses included one-sample t-tests against a …

“I Have A Voice”: Bridging The Communication And Sensemaking Gap Between Restorative Justice Practice And Program Implementation, Stefan Cocorelis

Dissertations

Restorative justice (RJ), a philosophy, practice, and movement inspired by local, largely Indigenous traditions, has increasingly been introduced in modern criminal justice systems as an alternative process to more comprehensively address harmful incidents, heal harms, and meet victim’s needs. While RJ implementation growth is encouraging for its advocates, there remain significant questions around formalized RJ practice. Specifically, little is known about the decision-making process in implementing and administering RJ programming within criminal justice. This dissertation aimed to contribute to the understanding of RJ practice and implementation efforts within criminal justice systems by putting emphasis on practitioners already working directly in …

Learning Through Lowriding: Knowledge In The Garage, Bianca Elisa Arellano

Dissertations

Lowriding culture has long been situated at the margins where state-sanctioned criminalization processes delegitimize the intellectual agency of lowriders, rendering their knowledge systems institutionally illegible. This dissertation argues that such epistemic invisibility denies lowriders the agency to define their own intellectual contributions, and it reclaims lowriding as a site of profound resourceful innovation. Grounded in Chicana feminist epistemologies, the study theorizes how nepantla—the process of navigating and living at the margins—works alongside rasquachismo, the working-class sensibility through which constraint becomes a site of knowledge production, to frame lowriding in Chicanx San Diego communities as an embodied tension where subversive, resourceful …

Heat Shock Factor 1 Signaling: A Novel Pathway Implicated In Rett Syndrome Pathophysiology, Sonia Gonzalez

Dissertations

Rett syndrome (RTT) is a severe neurodevelopmental disorder that is associated with loss-of-function mutations in the methyl-CPG binding protein 2 (MECP2) gene. There are limited therapeutic options to address the wide range of social, cognitive, motor, and respiratory symptoms that patients experience throughout their lifetime. To identify novel therapeutic targets, we leveraged a rare form of RTT known as MeCP2-mutation-negative or atypical RTT. Traditionally, RTT is first diagnosed clinically and then confirmed through the identification of mutations in the MECP2 gene. However, ~5% of RTT patients are found to be MeCP2-mutation-negative (atypical), despite sharing overlapping symptomology with typical RTT. We …

Underlying Mechanisms In The Relationship Between Ptsd And Irritable Bowel Syndrome, Jillian B. Heymann

Dissertations

Current bodies of knowledge support the relationships between posttraumatic stress disorder (PTSD) and irritable bowel syndrome (IBS), pain catastrophizing and PTSD, and pain catastrophizing and IBS. However, much less is known regarding how pain catastrophizing influences the relationship between PTSD and IBS. Additionally, while correlations between some demographic and trauma-related symptomatology have been elucidated in the relationship between PTSD and IBS, their impact as potential moderators on the relationship between PTSD and IBS has yet to be fully examined. Examining a student sample from a large midwestern university, the present study aimed to investigate the potential mediating and moderating roles …

Justice-Oriented Pedagogy: Personal And Programmatic Commitments In Teacher Education, Cheetara A. Hudson

Dissertations

This qualitative case study examined how faculty in an urban, justice-oriented undergraduate teacher education program prepare elementary teacher candidates to develop socially just and culturally responsive teaching practices. Guided by Critical Race Theory and critical multiculturalism, this study explored how instructors integrated social justice education and culturally responsive pedagogy into coursework and field experiences. Data were collected through semi-structured interviews, classroom observations, and document analysis with four faculty members teaching foundational and methods courses. Thematic analysis revealed four key findings: (a) faculty beliefs and identities, shaped by prior K–12 teaching experiences, strongly influence their pedagogical choices; (b) instructors model justice-oriented …

From Stranger To Self: The Role Of Familiarity In Modulating The N170 And N250 Erp Components, Tabish Gul

Dissertations

This study investigated how varying levels of face familiarity modulate the N170 and N250 event-related potential (ERP) components, two neural markers of face perception and recognition. While the N250 is widely considered familiarity-sensitive, the N170 has traditionally been linked to the structural encoding stage of face perception. However, recent research suggests that face familiarity may also influence N170 amplitude and latency. While most previous studies have compared up to three familiarity levels, the present study examined five levels of familiarity: own face, friend’s face, famous face, experimentally familiar face, and unfamiliar face. Twenty-six participants viewed face images while completing a …

Exploring Alternative Curriculum Implementation In Special Education Settings, Amber R. Wilson

Dissertations

The purpose of this qualitative case study was to understand teachers’ perceptions of implementing an alternative curriculum in their self-contained special education settings and grade levels, as well as their perceptions of the training and ongoing support provided for its implementation. This study used a case study research design. Findings revealed that the participants experienced several challenges related to training, ongoing support, and curriculum implementation, including issues aligning the alternative curriculum with state standards and assessments. This study is significant because alternative curriculum implementation is under-researched in the United States, and the international literature on this topic is limited.

Defining My Country: An Appalachian Educator’S Autoethnography Of Linguistic Erasure And Ai, Kimberly B. Wright

Dissertations

When students use AI writing tools to revise their work, the algorithms often erase the cultural and linguistic markers that constitute their authentic voice. This erasure operates through the same mechanisms that linguistic justice scholars have documented for decades: a dominant language ideology that frames non-dominant expression as deficient and “corrects” it into standardized prose. As a first-generation Appalachian educator who spent years suppressing her own voice to succeed in academic spaces, I recognize this pattern from the inside. Using autoethnography as a methodology, this study examines how my journey from voice erasure to reclamation informs my pedagogy to help …

Performing (For The) Guru: A Performance Studies Approach To The Study Of Cults, Todd M. Brown

Dissertations

This project approaches a long-term experience of living in a cult through a performance studies lens. Utilizing autoethnographic methods, it explores personal insights and observations from years within the inner-circle of a coercive religious environment under tyrannical leadership. A variety of systems and relationships are narrated and analyzed according to three categories: ritualization, deployability, and occupation. Ritualization explains how a body becomes imbued with the rhythms and mantras of a cultic milieu. Deployability describes how this body is put into action at the service of the leadership. Occupation, as a metaphor, illuminates how a cultic subject becomes filled with the …

Police, Punishment, And Mental Health: Examining The Effects Of School-Based Services On Disciplinary Inequities, Jessica Peña

Dissertations

The purpose of this study was to examine how school-based law enforcement officer (LEO) staffing ratios and school-based mental health provider (MHP) staffing ratios were associated with disciplinary disproportionality for students of color, and whether MHP staffing moderated the relationship between LEO staffing and disproportionality using a comprehensive national dataset. The following research questions guided this study:

Q1 Does disciplinary disproportionality exist in exclusionary practices within the current educational system?

Q2 How are ratios of school police officers related to disciplinary disproportionality?

Q3 How are ratios of school-based MHPs related to disciplinary disproportionality?

Q4 Does the ratio of school-based MHPs …

The Use And Efficacy Of Non-Verbal Gestures In Applied Studio Voice Instruction And Vocal Coaching, Mark Eugene Lubas

Dissertations

Despite important innovations in the use of technology in vocal instruction, individualized, faceto- face communication remains the predominant delivery modality for applied voice lessons and vocal coaching. Applied voice instructors and vocal coaches consistently identify non-verbal, gestural communication as a significant dimension of these instructional interactions. Existing scholarship has examined the expressive use of gesture in musical performance, the role of gesture in facilitating pitch accuracy acquisition among young singers, and the neurological responses of singers to gestural input. However, systematic investigation of gesture as a pedagogical instrument from the perspective of the instructor remains underdeveloped in the literature. This …

Reframing Health: A Phenomenological Inquiry Into The Lived Experiences Of Weight- Inclusive Healthcare Providers, Hannah Brass

Dissertations

The purpose of this phenomenological study was to understand the unique lived experiences of healthcare professionals who practiced from a weight-inclusive lens. This study was guided by the following research questions:

Q1 What is the unique lived experience of a healthcare provider practicing from a weight-inclusive lens?

Q2 What are the significant experiences that have influenced the development of weight-inclusive providers’ attitudes (i.e., thoughts, feelings, and behaviors)?

Data from these findings were analyzed using Giorgi’s (2009) descriptive phenomenological method to discover rich descriptions and themes of weight-inclusive healthcare practitioners' experiences. The study explored the significant experiences and supports that influenced …

Convergence And Divergence Of Opinion About Treatment Of Binocular Vision Disorders Among Vision Care Professionals, Sonia Young

Dissertations

There are three distinct professions prominent in the field of pediatric vision care. They are ophthalmology, optometry and orthoptics. All professions are integral to the detection and treatment of pediatric binocular vision disorders. However, distinct schools of thought exist to describe the best approach to pediatric binocular vision disorders and their treatments. Literature often highlights two opposing schools of thought represented by the “medical” and “behavioral” approaches. While there is academic debate about the merits and pitfalls of either approach, there is a paucity of nuanced perspectives which more closely resemble the ways in which pediatric ocular clinicians approach diagnosis …

“The Thorns Of The Most Severe Virtue”: Education, Religion, And Cultural Power In Michigan, 1798–1855, Kyle Christopher Vanderwall

Dissertations

This project seeks to demonstrate the centrality of education and religion as cultural power levers used by Americans, Odawa, and Catholic missionaries. Though the power of each culture was uneven, efforts to create educational institutions imbued with different denominations of Christianity, as well as continued contestation over land, remade the cultures of all involved. Americans privileged state-building practices, the Odawa acculturated to remain in Michigan when removal policies were enacted throughout the United States, and the Catholic church attempted to proselytize Indigenous communities.

Although the ethnohistorical method needed to be understood in order to write this project, it is not …

The Effects Of Fluency Building On Undergraduate Student Performance, Lauren B. Shibley

Dissertations

Online learning has become integral to higher education, with enrollment steadily increasing over the past decade and accelerating during the COVID-19 pandemic. Research highlights the importance of flexibility, learner autonomy, and self-regulated learning skills in this environment, with studies demonstrating that strategies such as mastery-based, self-paced instruction, fluency training, and timely feedback support student engagement and academic success. Early work adapting personalized instruction for online use (Pear & Crone-Todd, 1999) and subsequent studies on fluency practice (Quigley et al., 2018; Urbina et al., 2019) emphasize how these supports can improve concept retention. Despite these advances, more quantitative research is needed …

Structure-Property Relationships In Epoxy/Amine-Derived Polyester Thermosets, Jeffrey Aguinaga

Dissertations

This dissertation relates to ester-containing aromatic epoxy monomers and thermosets formed via reaction of those monomers with either ester-containing or non-ester-containing amine comonomers.  Due to the wide array of potential reactants (many bioderivable) to form ester-containing epoxy monomers that are closely related in structure, fundamental study of structure-property relationships was highly practical for this platform of materials.

Though properties of aromatic epoxy thermosets of relatively high-crosslink density and network strand rigidity vary widely with chemical composition and architecture, relatively low fracture toughness and impact resistance due to lack of ductility are typical. Integration of ester functionality and aliphatic spacers/connectors for …

Popular Protest And Corporate Reputation: Exploring The Impact On Recruitment And Retention, Heather Miller

Dissertations

In today’s sociopolitical climate, popular protest has become a powerful force shaping how organizations are judged and how people decide where to work. This qualitative study took place during a period of heightened sociopolitical activity and public unrest in the United States, when organizational responses to contested issues were especially visible and consequential. This study explored how popular protest affects corporate reputation (CR) and, in turn, influences employee recruitment and retention. Drawing on stakeholder theory (ST), corporate social responsibility (CSR), and corporate social advocacy (CSA), the study situated popular protest as an external pressure that exposes alignment or misalignment in …

Exploring The Effects Of Polymer-Graphene Interactions On Bulk Composite Properties Using Finite Element Analysis, Bryant Grove

Dissertations

As a filler in high performance materials, graphene significantly enhances the mechanical properties of polymer composites. Experimental characterization of graphene composite enhancements is limited by labor-intensive processes in both synthesizing composites for different purposes and in characterizing the interactions between graphene and polymer composites that lead to these enhancements. Computational approaches such as finite element analysis (FEA) are suitable alternatives that go beyond experimental analysis. This dissertation demonstrates the utility of FEA in analyzing polymer graphene composites with an emphasis on modeling the interaction between graphene fillers and the matrix within the interphase formed between them. The accessible design framework …

Small College Registrars As Leaders: A Multiple Case Study Of Shared Leadership, Kyle John Wigboldy

Dissertations

This study investigates the leadership relationship between the small college registrar and the people with whom they work most closely. The college registrar is not structured to be a strategic leader within the small college, but their leadership contributions across the campus are constantly felt. This research uses a qualitative case study approach to explore how three college registrars lead and participate with coworkers.

This investigation used a multiple case study design where data collection involved exploring three small colleges of fewer than 1,000 students. The study used semi-structured interviews with the registrar at each of the three colleges, and …

Assessing The Viability Of Cryptocurrency As A Payment Method: A Consumer Perspective, Aadavan Dharumaiyan

Dissertations

The problem addressed in this study was the limited mainstream adoption of cryptocurrencies for daily retail transactions despite continued technological advancement and increasing institutional interest. The purpose of this qualitative study, grounded in Husserlian descriptive phenomenology, was to explore the perceptual and behavioral factors influencing this adoption gap. Participants were recruited using snowball sampling, resulting in eight participants divided into two cohorts: active cryptocurrency payment users (Cohort 1, n = 2) and cryptocurrency holders who did not use cryptocurrencies for payments (Cohort 2, n = 6). Data were analyzed using the Moustakas phenomenological approach to identify patterns in participant experiences. …

Unpacking American Reception Of Glocalized Non-English Content In The Netflix Era, Sur Govindarajan

Dissertations

The swift growth of streaming services has revolutionized the worldwide distribution of media, making it possible for non-English and non-English-adjacent content to reach American consumers on a never-before-seen scale, which is sometimes perceived as an indication of increasing cultural tolerance. However, while a lot is known about what audiences see, far less is known about how they really understand and assess these stories. There is a fundamental vacuum in our understanding of audience reception as a lived, meaning-making process because previous research has mostly focused on consumption patterns. In order to close that gap, this study examines how American audiences …

Agents Of Agency: Identifying Teacher Traits And Trainings Associated With Promoting Student Agency, Clara Mateo

Dissertations

This study shifts the focus of mathematics teacher quality from the traditional metric of test scores to “student agency,” defined as a learner's capacity to access power, make decisions, and take ownership of their learning process. While the literature on student agency provides ample qualitative insights, it is largely composed of small-scale studies. This research addresses this gap by conducting a large-scale, nationwide quantitative analysis to identify teacher factors associated with the promotion of student agency. The central research question is: What teacher demographics, dispositions, and professional development experiences are associated with increased student agency?

This study used a cross-sectional …

The Impact Of Framing Effects And Moral Values On Prosocial Engagement, Olajuwon Olagbegi

Dissertations

Framing effects can shape perceptions, beliefs and behavior, particularly in prosocial contexts. The current study examined how language framing (social justice, social activism, volunteerism) and moral values influence interest in prosocial engagement across low- and high-cost helping scenarios. Participants (N = 219) were randomly assigned to one of three framing conditions and reported willingness to help in both low- and high-cost situations. They also completed the Moral Foundations Questionnaire. Replicating prior work (Olagbegi and colleagues, 2024), participants were more willing to engage in low- than high-cost helping. Across conditions, social justice framing elicited the greatest willingness to help. Higher fairness …

Intelligent Surveillance For Weapon Threat Detection: Transformer-Based Detection And Segmentation Using Thermal And Rgb Imagery, Akhila Kambhatla

Dissertations

Proactive public-safety surveillance requires deep learning systems that can detect and segment weapons reliably under real-world conditions. This research develops and evaluates a progressive, multi-phase pipeline that moves (i) from RGB object detection to pixel-level semantic segmentation and (ii) from visible-spectrum cameras to thermal imagery to improve robustness under low-light, clutter, and occlusion. Early phases establish strong detection baselines using one-stage and two-stage detectors (YOLOv5 and Faster R-CNN) for multi-class weapon localization, followed by practical optimization through pruning and ensembling to reduce false positives and computational overhead while maintaining real-time feasibility. Building on the limitations of bounding-box localization, the methodology …

The Phylogenetic And Biogeographic History Of Cranes (Gruidae), Phillip Conrad Williams

Dissertations

Cranes (Gruidae) are a globally distributed clade of large, wetland-associated birds. Prior phylogenetic analyses have shown there to be two major subfamilies, Balearicinae and Gruinae, and five consistently recovered clades within Gruinae. However, the relationships among those five clades has remained contentious. In addition, little has been done to reconstruct the biogeographic history of cranes. To that end, I first inferred phylogeny using a large, nuclear dataset sampled from all 15 extant crane species and two outgroup species. The phylogeny mostly agreed with previous analysis using whole mitochondrial genomes but differed in that the Anthropoides species group formed a sister …