Digital Commons Network^™

The Effects Of Singing In Music Therapy Sessions On Vocabulary Acquisition With Children With Asd, Yeim Kim

Theses and Dissertations

Background: Children with Autism Spectrum Disorder (ASD) often struggle with language acquisition and maintaining engagement during learning activities. While music therapy has shown promise in supporting communication and behavior in children with ASD, few studies have focused on its effect on vocabulary acquisition, particularly in comparing different types of music interventions like singing and non-singing approaches.

Purpose: This study aimed to explore how singing, as a method used in music therapy, affects vocabulary acquisition in a child with ASD. Three research questions guided this study: (1) How do singing and non-singing programs influence receptive vocabulary acquisition in a child with …

Experienscape And The Interior Environment: A Case Study At A Bar With Entertainment, Paige J. Hendrickson

Theses and Dissertations

The goal of this study was to understand what aspects of the interior environment at a bar with bowling affect customers’ willingness to return and word-of-mouth sharing. The dimensions of the experiencescape model were used to guide the research, focusing on sensory, functional, social, and hospitality culture. A mixed qualitative methods approach was used, combining observations, focus group interviews, and moment maps to investigate customer comfort, satisfaction, excitement, memorability, and the difference in one’s perception of their experience based on ethnicity. It was found that the unique atmosphere, price, staff, and diversity were the main reasons customers returned or shared …

Perceptions And Treatment Decisions For A Drug Offender Based On Social Class, Cocaine Type, Personal Characteristics, And Compassionate Love: A Vignette Study, Yasmin A. Odeh

Theses and Dissertations

Problem: The shift from a focus on rehabilitation to the more punitive, “tough on crime” approach to illegal behavior in the U.S. has been enacted in no small way by policies connected to the use and abuse of drugs. The disparities between crack and powder cocaine—two chemically similar substances—have headlined this shift (Vagins and McCurdy 2006). However, research is scarce on laypeople’s approval of deterrence approaches for drug offenses, including as a function of types (e.g., powder vs. cocaine possession). This study examined people’s perceptions of prosecutorial decisions for drug offenders—whether they are punished, rehabilitated, or both—and whether people perceived …

Normalizing Delinquency And Risky Behaviors In Adolescents: An Application Of Neutralization Theory To Parents, Audrey Cheatham

Theses and Dissertations

Sykes and Matza’s Neutralization theory (1957) was originally developed to explain juvenile involvement in delinquency, with extensions of this theory being used to understand crime in other offending groups. Although neutralization theory has been widely applied to offenders, far less research has examined how neutralizations may be used by non-offending groups. This study applies Sykes and Matza’s framework to parents to explore whether neutralizations are being employed to justify risk taking or delinquent behavior among their adolescent children. This study also examines how parents differentiate risky behavior from delinquent behavior, as well as their attitude towards seven major risk factors …

Improving Student Behavior And Safety On Bus Route 40 Through A Team-Based Climate Intervention, Kathleen M. Lopez Rodriguez

Theses and Dissertations

Student transportation is a daily yet often overlooked component of school climate, safety, and equity. This Dissertation in Practice (DiP), aligned with Carnegie Project on the Education Doctorate (CPED) principles of inquiry, collaboration, and continuous improvement, examined how a structured, team-based intervention could improve student behavior and bus climate on Bus Route 40 at Pinecrest Primary School. Guided by improvement science principles and grounded in a commitment to equity, the study applied a 90-day Plan–Do–Study–Act (PDSA) cycle to test and refine strategies aimed at fostering safety, belonging, and accountability among students. The intervention organized students into color-coded teams that earned …

Genetic Relative-Finder Services: A Qualitative Study Of Consumer Experiences, Sarah A. Sciba

Theses and Dissertations

Background: Genetic genealogy is an emergent topic in sociology. To date, over 41 million individuals worldwide have tested with the top four direct-to-consumer genetic testing (DTCGT) companies: AncestryDNA, FamilyTreeDNA, 23andMe, and MyHeritageDNA (Glynn 2022). These tests provide consumers with ethnicity estimates, a list of DNA cousin matches, or both. Despite the popularity of DTCGT, there is a lack of data on consumer experiences with genetic relative-finder services (GRF) in the sociological literature. Methodology: I conducted exploratory, qualitative research in the form of in-depth interviews with eight adult women who have used GRF. I gathered data about their motivations for participation …

Building Student-Teacher Relational Trust Through The Promotion Of Student Voice Initiatives, Scott Scherquist

Theses and Dissertations

This Dissertation in Practice investigated how student voice initiatives can strengthen student–teacher relational trust within an urban Pre-kindergarten through eighth grade (PreK-8) school serving a predominantly Black student population. Grounded in Khalifa’s (2018) Culturally Responsive School Leadership framework, the study implemented a 90-day cycle of inquiry focused on a three-part pathway intervention: the establishment of a Student Voice Committee, professional development on culturally responsive practices, and Student Consultation for School Change. A convergent mixed methods design was employed, combining two administrations of the 5Essentials Survey with pre- and post-intervention interviews of students and teachers. Findings revealed disparities between student and …

Savior To Ally: Exploring White Students' Decisions To Major In Social Work Through The Lens Of White Saviorism, Amy S. Dennison

Theses and Dissertations

This qualitative study explored how white students chose social work as a major and how white savior ideology reinforced or challenged students’ choices. The study contributes to a gap in the literature regarding white saviorism and social work education. Using a phenomenological approach, data were collected through semi-structured interviews from five undergraduate social work students at one Midwestern state university. Transcripts were analyzed thematically using Moustakas’ data analysis for phenomenology framework. The findings revealed that participants chose social work because of an intent to help others, as well as a desire for their work to have a meaningful impact. White …

Examining The Impact Of Conceptual Mathematics Instructional Practices On Middle School Achievement For Low-Income Public-School Students, Tracy L. Donath

Theses and Dissertations

This dissertation in practice investigates the persistent decline in mathematics proficiency between the fourth and fifth grades, particularly among low-income compared to high-income students in a large, urban public school district in central Illinois. Using Mintrop’s Cycle of Inquiry and the CPED framework in a 90-day intervention, seven fifth-grade teachers implemented small group lessons designed to build students’ conceptual understanding of grade level mathematics. This data-driven intervention encouraged the teachers to use a variety of manipulatives and visual representations to improve students’ mathematics proficiency on four grade level Common Core standards. Data collected through classroom pretests, posttests, and exit tickets, …

Adhd Research And Practice: An Evaluation Of Psychologists’ Utilizations Of Adhd Assessments In Practice, Desiree Giesen

Theses and Dissertations

The incidence of first-time Attention-Deficit/Hyperactivity Disorder (ADHD) diagnoses among adults has been on the rise. There is limited research on effective practices for evaluating adult ADHD, with previous studies showing conflicting results regarding the effectiveness of various assessment measures. The current study investigates the assessment tools chosen by psychologists and their perceived importance in evaluating ADHD. A cross-sectional design was used with 200 participants who were primarily licensed psychologists. The unstructured clinical interview with the client was the most used assessment tool and was rated as having the highest importance, whereas continuous performance tasks were rated as having the lowest …

The Role Of Student Loan Debt On Delayed Homeownership Among Black American College Graduates, Dedan Makongoro Kusaga

Theses and Dissertations

The growing burden of student loan debt in the United States has raised significant concerns about its broader social and economic impacts, particularly on young adults’ ability to achieve financial milestones such as homeownership. Black American college graduates are especially affected, often carrying higher loan balances and facing greater financial barriers due to historical and structural inequalities. This quantitative study examined the role of student loan debt and other factors influencing delayed homeownership among Black American college graduates, using the public-use Baccalaureate and Beyond (B&B: 2008/2018) dataset from the National Center for Education Statistics (NCES). Findings indicated student loan debt, …

Identifying The Common Patterns Or Trends That Emerge When Analyzing Past Accidents And Incidents Involving Autopilot Systems, Christopher David Tracy

Theses and Dissertations

This study investigated to what extent over-reliance on automation, particularly autopilot systems, contributed to incidents and accidents in commercial aviation. Despite advancements in automated technologies, there is a growing concern regarding the potential consequences of pilots’ dependency on these systems. This research analyzed past key incidents to identify patterns indicating that pilots may have been inadequately prepared to assume manual control during automation failures. This study employed a qualitative approach, including semi-structured interviews with aviation professionals such as airline flight instructors, line check pilots, flight standards evaluators, and an FAA aviation safety inspector, along with qualitative surveys with professional pilots. …

Advanced Motor Control Using Td3 Model-Free Reinforcement Learning, Muhammad Azam

Theses and Dissertations

Motor control plays a critical role in industrial automation, ensuring the precise regulation of speed, torque, and position across various applications. Traditional motor control techniques, such as open-loop, closed-loop, and feedback control, have been widely used but face limitations in handling complex and dynamic systems. Recent advancements in machine learning (ML) offer potential improvements in motor control by enabling systems to learn optimal control policies autonomously. This research investigates the integration of Reinforcement Learning (RL) with Field-Oriented Control (FOC) for the control of Permanent Magnet Synchronous Motors (PMSMs). The study aims to address a significant gap in reward function design, …

An Exploratory Investigation Of The Impact Of Psychological Intimate Partner Violence On College Women: A Qualitative Study, Dana Juel Conzemius-Schindler

Theses and Dissertations

Researchers have found psychological intimate partner violence (P-IPV; defined as emotional and verbal abuse utilized to degrade, demean, create fear, control, or isolate; Tolman, 1989; Sullivan et al., 2012) is detrimental to mental health functioning, including increased sexual risk behaviors, depressive and anxious symptomology, and relationship dissatisfaction (Hellemans et al., 2015; Overstreet et al., 2015). Despite this, little is known regarding the academic and psychological lived experiences of survivors of P-IPV. Therefore, the current study sought to qualitatively explore the lived experiences of female-identified students exposed to psychological intimate partner violence while in college. Through a Consensual Qualitative Research (CQR; …

Military Recruitment And Retention: A Policy And Practice Analysis, Orly Naum

Theses and Dissertations

The ongoing decline in United States military recruitment and retention presents a growing challenge to sustaining an effective All-Volunteer Force (AVF), particularly within the United States Coast Guard, a branch that has historically been underrepresented in academic research, and across the Department of Defense (DoD). This convergent mixed methods study examined how generational cohorts and individual motivations influence recruitment and retention, integrating quantitative data from the Defense Manpower Data Center (DMDC) and qualitative survey responses from a veteran-rich collegiate population. The quantitative analysis revealed statistically significant differences in Armed Forces Qualification Test (AFQT) scores between Generation Z (GenZ) and Generation …

Ecological Dynamics In Beaver-Engineered Boreal Wetlands: Amphibian Phenology, Occupancy, And Aquatic Macroinvertebrate Communities, Talon Stammen

Theses and Dissertations

Boreal wetlands are ecologically rich yet vulnerable ecosystems shaped by hydrological dynamics, cold climate regimes, and landscape-scale disturbances. Among the most influential agents of change in these systems are beavers (Castor canadensis), whose engineering activities create a mosaic of lentic habitats at varying stages of ecological succession. This dissertation investigates the structure and dynamics of amphibian and aquatic macroinvertebrate communities across a beaver-influenced wetland landscape in Voyageurs National Park, Minnesota, USA.The first study (Chapter II) examines breeding phenology and detection patterns of boreal anurans using a combination of passive acoustic monitoring and visual encounter surveys at 25 wetlands over four …

Walk This Way: Effects Of Eyewitness Identification Factors And The Featural Justification Effect On Mock-Juror Decision-Making, Lauren Nicole Stornelli

Theses and Dissertations

Surveillance cameras serve many purposes, including security, monitoring, and investigating crimes. The presence of surveillance cameras allows for a new form of witness: a non-eyewitness, where crimes are captured by surveillance cameras without a physical witness present (Pezdek & Lerer, 2023a). As such, police officers are acting as eyewitnesses by identifying the perpetrator from the surveillance evidence and testifying about their identification at trial (Rumschik et al., 2020). Previous studies have examined participants’ ability to accurately match previously viewed faces with faces on surveillance evidence, with results suggesting accuracy rates around chance (e.g., Bruce et al., 2001; White et al., …

Targeted Coaching In The Detroit Promise Path: A Thematic Network Analysis Of Current Challenges And Opportunities For Student Success, Maryse Danielle Wilson

Theses and Dissertations

The Detroit Promise Program is one of the many college promise programs operating within the United States that offers full college tuition coverage to students within the city who meet certain residential criteria. Detroit’s population has one of the highest proportions of Black and first-generation students and the lowest average socioeconomic class in the country. From the time of the Promise Program’s launch until now it has seen minor improvements in college degree competition rates, but this rate is still low compared to the national average. The Detroit Promise Path, which is an off branch of the Detroit Promise Program, …

The Weapon Focus Effect On Memory For Male And Female Perpetrators, Faith Christel Aasen

Theses and Dissertations

Previous research on the weapon focus effect suggests that weapon presence causes reduced memory accuracy for perpetrator details due to weapons being surprising and unexpected. The unusualness hypothesis suggests that a stronger weapon focus effect should occur when the perpetrator defies typical gender stereotypes, such as a woman holding a gun. The current study sought to examine how the weapon focus effect impacts eyewitness memory for male and female perpetrators, specifically exploring the magnitude of the effect on female perpetrators. The current study further investigated whether the own gender bias attenuates the weapon focus effect on memory for female perpetrators. …

Comparative Analysis Of Lstm-Based And Traditional Hydrologic Models For River Discharge Prediction: A Case Study Of The Goose River, Adewale Ajao

Theses and Dissertations

Streamflow predictions are important in planning water resources and effective hydrological management. Physically based models such as the Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) have been used in the past for this purpose. Still, the use of machine learning models such as Long Short-Term Memory (LSTM) has been proven to complement the use of traditional models. This study compares the reliability performances of HEC-HMS and LSTM models to predict the streamflow of Goose River Watershed in North Dakota. The objective of the research is to perform a comprehensive comparative analysis between the performance of HEC-HMS and LSTM models to predict …

Machine Learning-Guided Discovery Of Metal-Ligand Catalysts For Affordable Green Hydrogen Produced Via Proton Exchange Membrane Electrolyzers, Achouak Benarbia

Theses and Dissertations

The rising demand for clean and sustainable energy sources has underscored the critical role of hydrogen in the global energy transition. However, the widespread adoption of green hydrogen remains constrained by the high cost and scarcity of platinum-based electrocatalysts used in Proton Exchange Membrane (PEM) electrolyzers. This dependence inflates production costs and poses long-term risks related to supply security and scalability. While numerous studies have explored alternative materials, the discovery of efficient and stable non-platinum catalysts remains a major bottleneck due to the vastness of chemical space and the resource-intensive nature of experimental screening. To address this challenge, this study …

End-To-End Autonomous Quadcopter Using Reinforcement Learning, Mohamed Marwan Chawa

Theses and Dissertations

This thesis investigates the potential of Reinforcement Learning (RL) for achieving robust and adaptable quadcopter control, focusing on trajectory and attitude stabilization. We compare state-of-the-art RL algorithms, specifically Proximal Policy Optimization (PPO), against traditional Proportional-Integral-Derivative (PID) controllers across three tasks: hovering, slow trajectory following, and fast trajectory following. To enhance realism, we employ a modified PyFlyt simulation environment with a high-fidelity Crazyflie 2.x model, accounting for motor dynamics, noise, wind disturbances, and aerodynamic drag.

The challenge of operating a quadcopter can be divided into two distinct parts: planning a flight path and actually following that path. Our focus is on …

Narrative Engineering: Tools, Computational Structure, And Impact Of Stories, Michael A. Debuse

Theses and Dissertations

Computational Linguistics has a long history of applying mathematics to the grammatical and syntactic structure of language; however, applying math to the more complex aspects of language, such as narrative, plot, scenes, character relations, causation, etc. remains a difficult topic. The goal of my research is to bridge the narrative humanities with mathematics, to computationally grasp at these difficult topic, and help develop the field of Narrative Engineering. I view narrative and story with the same mathematical scrutiny as other engineering fields, to take the creativity and fluidity of story and encode it in mathematical representations that have meaning beyond …

An Exploratory Analysis Of Within And Between-Testlet Local Item Dependence In A Medical School Admission Situational Judgment Test Using Exploratory Structural Equation Modeling, Ester Sampson

Theses and Dissertations

To use a Cronbach's alpha coefficient or IRT methods on measuring instruments, both unidimensionality and local item dependence (LID) conditions need to be met. Moreover, LID can potentially introduce an unintended additional dimension into the test at the expense of the constructs of interest. Situational judgment tests use testlet structures, and thus likely present degrees of LID. We explored the latent structure and degrees of local item dependence in a situational judgment test (SJT) used by a Western United States medical school (WMS) for admission purposes. I used a fully deidentified data set from a group of 560 examinees who …

Development Of A Real-Time Convolution System To Simulate Speech In Different Rooms For The Study Of Vocal Strain, Bethany E. Wu

Theses and Dissertations

Due to prevalent vocal health issues in teachers, the acoustics of K-12 classrooms has become a topic of study in acoustics. One way to understand the effects of a classroom's physical space on speech is with vocal effort studies. This thesis aims to enable these studies, without the need to move a talker from room to room, by creating auralizations through real-time convolution of speech with oral binaural room impulse responses (OBRIRs). These auralizations can be used to test talkers inside an anechoic chamber as they experience speaking in different acoustical environments. A system that can successfully execute convolution in …

Post-Processing National Water Model Long-Range Forecasts With Random Forest Regression In The Cloud To Improve Forecast Accuracy For Decision-Makers And Water Managers, Jacob Matthew Anderson

Theses and Dissertations

Post-processing bias correction of streamflow forecasts can be useful in the hydrologic modeling workflow to fine-tune forecasts for operations, water management, and decision-making. Hydrologic model runoff simulations include errors, uncertainties, and biases, leading to less accuracy and precision for applications in real-world scenarios. We used random forest regression to correct biases and errors in streamflow predictions from the U.S. National Water Model (NWM) long-range streamflow forecasts, considering U.S. Geological Survey (USGS) gauge station measurements as a proxy for true streamflow. We used other features in model training, including watershed characteristics, time fraction of year, and lagged streamflow values, to help …

Using Two-Dimensional Terahertz Spectroscopy To Explore Vibrations, Magnetism, And Their Coupling, Megan Faux Biggs

Theses and Dissertations

Terahertz (THz) light is at the resonant frequency of important fundamental excitations within crystalline materials such as carrier dynamics, phonons, and spin-wave excitations called magnons. THz light can be produced at high field strengths using optical rectification in nonlinear optical (NLO) crystals. N-benzyl-2-methyl-4-nitroaniline (BNA) is one such crystal commonly used to produce THz when pumping with 800 nm light. Here, we improve upon the design of the molecular building blocks of BNA by replacing a hydrogen atom with a fluorine atom, leading to improved THz generation and a higher crystal damage threshold. Later, we focus on using THz light to …

New Chapters In An Old Book: New Discoveries In Transferrin's Blood Stream Modulators And Analytical Methods, Shelby Thomas Harris

Theses and Dissertations

Human serum transferrin is a 79 kDa glycoprotein responsible for the safe transport of iron throughout the blood stream. Transferrin binds up to two ferric ions in two domains known as the N-lobe and C-lobe respectively. Thus, there are four transferrin metalloforms: apo-Tf (with no iron bound), FeN-Tf (with one iron bound in the N-lobe), FeC-Tf (with one iron bound in the C-lobe) and holo-Tf(with two iron ions bound, one in each of the lobes). The two domains are homologous but feature differences in the kinetics and thermodynamics of iron binding and release. The two lobes are also different in …

Fans In Ancient Egypt: Iconographic And Contextual Study Of Fans In The Predynastic, Old, And Middle Kingdoms, Nadra Zaki

Theses and Dissertations

A variety of fans existed throughout ancient Egyptian history. They had several forms and were made of different materials. They appear in two- and three-dimensional representations, as well as in texts. They relate to royalty and high officials and also feature in domestic settings, both out- and indoors. Fans were used for creating breeze, and providing shade in real life, and also during the journey to the afterlife, where they combined physical and metaphysical protection. Several names were associated with fans, depending on their functions, both in the secular and sacred world.

Earlier studies have either generally examined fans …

Time Reversal Delivery Of Long Duration Noise To A Targeted Location: Achieving Higher Amplitude While Maintaining A Desired Spectral Shape And Maximizing The Spatial Extent, Rylee Scott Russell

Theses and Dissertations

Time Reversal (TR) is a signal processing technique that can be used to focus acoustic waves to a specific location in space, with most applications aiming to create an impulsive focus. This study instead aims to focus long-duration noise signals using TR. This thesis seeks to generate higher amplitude noise at a desired location over an existing method of broadcasting equalized noise. Additionally, this thesis explores various characteristics associated with focusing long duration noise using TR. The dependence of the focal amplitude on the duration of the focused signal is explored as well as the implications of using multiple sources …