Digital Commons Network^™

Task-Dependent Modulation Of The N170 Erp Component In Facial Perception, Mary M. Krdikashyan

Electronic Theses, Projects, and Dissertations

The N170 component plays a key role in face perception, but how attention influences it remains debated. In a series of five electroencephalography (EEG) experiments, we examined how attention to different facial features (holistic versus feature-based) affects the N170 amplitude. This study aims to determine whether perceptual competition explains these effects. In a preliminary study (Experiment 1), participants were primed to focus on either gender, age, emotional expression, race, or no specific task. This study showed a larger amplitude for gender and age, followed by emotion, with minimal differences for race, and no task was assigned. Since all these conditions …

Female Victimization In Intimate Partner Violence, Phileine Phan

Electronic Theses, Projects, and Dissertations

Intimate Partner Violence (IPV) is a widespread issue that disproportionately affects women, causing significant physical, psychological, and economic harm. Although research has explored IPV prevalence and risk factors, fewer studies address how race, socioeconomic status, sexual orientation, and disability intersect to shape women’s experiences and access to support. Generalizing survivors’ experiences often leads to overlooked services and policies for marginalized women. This study addresses that gap through a qualitative systematic review of peer-reviewed research on IPV victimization among women in the United States. A thematic analysis will be used to identify patterns related to systematic inequalities, help-seeking barriers, and the …

Impact Of Escitalopram On Postpartum Sleep/Wake Activity And Maternal Behaviors, Kimberly Guerrero Leon

Electronic Theses, Projects, and Dissertations

The postpartum period is characterized by profound physiological and psychological changes, including disruptions in sleep and activity patterns, which may contribute to the onset of postpartum depression. If left untreated, postpartum depression can result in long-term consequences, including cognitive impairments, emotional dysregulation, impaired maternal-infant attachment, and the onset of sleep-related disorders. Selective serotonin reuptake inhibitor (SSRI), escitalopram, is prescribed for the treatment of postpartum depression due to its efficacy, favorable safety profile, and relatively low cost. While escitalopram is considered an effective treatment for depression and anxiety, far less is known about its impact on maternal behaviors during the postpartum …

Serotonin 7 Receptor Modulation On Measures Of Working Memory And Anxiety, Antonio Gutierrez

Electronic Theses, Projects, and Dissertations

Serotonin (5-HT) function is critical in the regulation and homeostasis of several neural systems. Alterations in 5-HT levels can directly impact the presence of neuropsychiatric disorders such as schizophrenia. With a wide range of 5-HT receptors, the potential impact each of these modulators have on behavior is important to better understand. The 5-HT7 receptor is the most recently identified 5-HT receptor. 5-HT7 receptors can be found in the thalamus, hypothalamus, and several areas of the hippocampus. Modulation of these receptors impact circadian rhythms, hormonal regulation and memory function. Previous research has that 5-HT7 antagonist compounds lead to conflicting results, highlighting …

Trauma-Informed School Practices, Mental Health, And Academic Engagement Among High School Foster Youth, Ashley Avila, Vanessa Ramirez, Jaden Simmons

Electronic Theses, Projects, and Dissertations

Exposure to abuse, neglect, family separation, and violence can negatively affect foster youths’ well-being and their ability to succeed in school environments. Studies have shown that punitive disciplinary responses may contribute to retraumatization and school discouragement, while school settings are often one of the few stable environments in the lives of foster youth. Although trauma-informed school practices have been associated with improved school climate and student engagement, limited research has specifically examined how foster youths’ perceptions of these practices are associated with their mental well-being and academic engagement in high school settings. The purpose of this proposed study is to …

Interrupting Intergenerational Trauma, Teresa Iribe-Arroyo, Demiana Adel Shenouda

Electronic Theses, Projects, and Dissertations

Adverse childhood experiences (ACEs) are traumatic events that occur during childhood, the ages of 0 and 17. Many individuals may have experienced ACEs without fully recognizing how these early experiences continue to affect their daily lives. These inhibitors can include mental health struggles, physical health problems, academic and behavioral functioning. In contrast, Positive Childhood Experiences (PCEs) can serve as protective factors, helping to buffer against some of the negative outcomes associated with childhood trauma. This proposed study seeks to better understand how both ACEs and PCEs shape individuals into adulthood, particularly in their roles as parents.

This proposed research would …

Raising Resilient Children: Parent Video Guide To Support Children’S Emotional Development, Perla F. Nunez-Chavez

Electronic Theses, Projects, and Dissertations

Social-emotional learning (SEL) in early childhood plays a critical role in

children’s ability to recognize emotions, regulate behavior, build relationships,

and succeed in academic settings. During the preschool years (ages 3–5),

children experience rapid emotional development and rely heavily on parents for

co-regulation, emotional modeling, and guidance. Research consistently shows

that when parents engage in emotion coaching practices, such as labeling

feelings, validating emotions, and modeling regulation strategies, children

demonstrate stronger emotional competence and improved developmental

outcomes. However, despite strong evidence supporting parent involvement in

SEL, many existing interventions are delivered through structured, in-person

programs that are often inaccessible to …

Nonbinary And Transgender Representation In Media: How Scripted Media Impacts And Shapes The Identities Of Communities Outside The Gender Binary, Makenna Dykstra

Electronic Theses, Projects, and Dissertations

The lack of, and otherwise poor, representation of nonbinary and trans communities contributes to the societal othering of these communities. However, nonbinary and trans representation holds importance to these communities. Trans and nonbinary communities, like other communities, use media to help them negotiate their identities (Hall, 2005). However, current representation in scripted television is small and contentious, with the ability to have just as much of a negative impact as a positive one. LGBTQ+ television has a history of favoring moderate depictions of queerness, like that in nonbinary and trans characters, as a means of defining these identities to cisgender …

Access, Equity, And Achievement: The Impact Of Student Support Programs On First-Generation College Students Through Their Lived Experiences, Veronica Carrero

Electronic Theses, Projects, and Dissertations

First-generation college students often enter higher education while confronting significant systemic inequalities that limit their academic preparedness, confidence, and sense of belonging. These challenges deeply intertwined and often overlooked intensify gaps, the complexity of their college process, and underscore the urgent need for support structures that nurture both cognitive development and socio-emotional well-being. This qualitative, exploratory, phenomenological study examines the lived experiences of ten first-generation college students enrolled across California State Universities (CSU), focusing on how access and equity initiatives shape their academic journeys.  Student Support Programs such as the Educational Opportunity Program (EOP), TRIO Student Support Services (SSS), and …

Tips For Health Care Practitioners: A Guide For Adolescent Obesity, Regina Santana

Electronic Theses, Projects, and Dissertations

Adolescent obesity continues to be a significant public health concern that is associated with long term physical consequences. The purpose of this project was to develop an evidence based, user friendly guidebook that supports healthcare professionals in the education of adolescents with obesity and their families. A structured literature review development process was used to inform the current development of the guidebook. The guidebook includes components of obesity management such as nutrition and physical activity recommendations. The validity of the content was established through the evaluation of five healthcare professionals that include registered dietitians and licensed therapists. The guidebook was …

Effectiveness Of Independent Living Programs On Preparing Transition-Age Foster Youth For Higher Education And Employment., Naomi Cailipan, Jasmine Nevarez, Emily Matias

Electronic Theses, Projects, and Dissertations

Transition-age foster youth face significant barriers to higher education and stable employment, increasing their risk of housing instability, unemployment, and long-term economic hardship. Independent living programs (ILPs) aim to support the youth develop life skills and connect them to resources that prepare them for a successful transition into adulthood, however, there is limited research that explores the youth’s perspective on the effectiveness of ILPs. This study seeks to provide insight by interviewing current and former foster youth who participated in an ILP by conducting combined research, integrating both quantitative and qualitative approaches. Quantitative data will be collected through a Likert-scale …

Investigating Fentanyl-Xylazine Interactions: Implications For Opioid-Induced Hyperalgesia And Affective Dysregulation In Rats, Alejandra R. Lujan

Electronic Theses, Projects, and Dissertations

The growing prevalence of fentanyl adulterated with xylazine presents a major public health concern, yet the behavioral and physiological effects of this combination remain poorly characterized. This study examined the effects of acute fentanyl administration, alone and in combination with xylazine, on opioid-induced hyperalgesia, affective behavior, and mortality in male and female Sprague-Dawley rats (n=80). Rats received four fentanyl injections (60 µg/kg) administered at 15-minute intervals, with or without xylazine (0, 0.1, 0.333, or 1.0 mg/kg), as well as a saline control condition. Pain sensitivity was assessed using a hot plate assay at 6.5, 12, 24, and 48 hours post-injection. …

Enrichment Of The Thermophilic Archaea Gearchaeales And Calditenuis In Lab Culture, Walter Saldivar

Electronic Theses, Projects, and Dissertations

Numerous microbes on Earth have yet to be grown in pure cultures and studied in the laboratory. Cultivation-independent genomic methods, such as metagenomics, can help us predict their metabolic capabilities, but cultivation remains valuable for testing these predictions. These uncultivated microbes are very diverse, especially within hot springs. Examples of these uncultivated microbes include the genus Calditenuis (formerly Aigarchaeota Group 1) and the order Gearchaeales; they are often abundant in terrestrial hot springs such as Great Boiling Springs (GBS) in Nevada. Previous work allowed for the establishment of laboratory enrichment cultures inoculated from sediments of GBS containing Calditenuis and …

Associations Between Water Intake, Dietary Quality, And Beverage Consumption Among University Students, Mohammad A. Qazi

Electronic Theses, Projects, and Dissertations

Title: Associations Between Water Intake, Dietary Quality, and Beverage Consumption Among University Students

Background and Aims: Sugar-sweetened beverage (SSB) and ultra-processed food (UPF) consumption significantly contribute to chronic disease risk and is often more common in underserved and racially/ethnically diverse communities. Drinking water is a low-cost, calorie-free behavior that may support healthier beverage and dietary patterns. Previous studies show that increased daily water consumption positively correlates with better diet quality and is inversely correlated with SSB and UPF consumption. This study aims to examine whether (1) increased daily water intake is associated with self-reported diet quality and (2) self-reported hydration …

Easy Travel-Friendly Snack Recipes For College Students To Support Mental Well-Being, Lidia Vides

Electronic Theses, Projects, and Dissertations

College is a pivotal period in life of a young adult, marked by newfound independence, increased responsibilities, heightened academic pressure, and significant changes in daily routine. While this transition can often be exciting for a young adult, it also presents many different challenges. As a result, many students experience increased levels of stress, anxiety, and depression. Nutrition plays a powerful yet often overlooked role in supporting mental and physical health. Current research studies show that a balanced diet rich in whole food ingredients can help regulate mood and promote emotional well-being through multiple biological pathways. However, despite this knowledge, convenient, …

Lgtbq+ Foster Youth Aging Out Of The Child Welfare System, Anna M. Gutierrez Chavez

Electronic Theses, Projects, and Dissertations

ABSTRACT

On the average time frame, former foster youth were reported homeless between 2012 and 2017. Equally important, is that nearly 39% of homeless youth identify as LGTBQ+.  This research will discuss disproportionality and disparities among youth who struggle with homelessness in the LGTBQ+ population. Research suggests that youth aging out of foster care are more likely to become homeless. Studies found that LGBTQ+ youth being discharged from care did not receive adequate support and guidance from the child welfare system to help them transition into adulthood, which may have led to homelessness.  This study will examine what services and …

Healing Beyond Bars: Integrated And Sustainable Recovery Models For Post-Incarcerated Women, Patricia A. Nunez, Jonathan Solomon

Electronic Theses, Projects, and Dissertations

Substance Use Disorders (SUDs) significantly impact the re-entry process for formerly incarcerated individuals, particularly Latina/x women, who face unique cultural, social, and economic challenges in accessing effective treatment. The purpose of this study is to explore the effectiveness of substance use disorder treatment programs in support of successful reentry outcomes for Latina/x women post-incarceration. Previous research on SUD treatment for this population remains limited despite growing awareness of the need for gender-responsive and culturally informed interventions. Qualitative research with an exploratory design within an interpretive research paradigm will be utilized to investigate the lived experiences of Latina/x women who have …

Barriers To Healthcare In Lgbtq+ Baby Boomers, Kellie Jones, Alexandra Lomeli, Bryant Vargas

Electronic Theses, Projects, and Dissertations

LGBTQ+ Baby Boomers have experienced decades of discrimination, societal suppression, and exclusion from equitable healthcare. Despite advancement in recent years, healthcare disparities persist, and past experiences of discrimination may contribute to present-day barriers in accessing quality care. Existing research often neglects the intersectionality of aging, sexual orientation, and identity, leaving a gap in understanding the long-term effects of historical trauma on healthcare access for this population.

This quantitative study seeks to answer the question: How does the historical trauma experienced by the LGBTQ+ Baby Boomer population impact the healthcare barriers they face? This study proposes to examine the relationship of …

A Qualitative Study Of Maternal Morbidity And Mortality In The United States, Stacy D. Harris

Electronic Theses, Projects, and Dissertations

Maternal morbidity and mortality (MMM) in America are largely preventable. The aim is to analyze disparities found in women of color regarding MMM in America and evaluate: How does adequate maternal health care affect the morbidity and mortality disparities found in communities of disadvantaged mothers? This research will employ a qualitative analysis of mothers, a more specified age group, and region (West Coast) of the United States. Previous work neglected to obtain in-depth, first-hand interviews with mothers residing regionally in the United States from a specified age group. An interview guide will be used to conduct comprehensive interviews virtually. Expert …

Mental Health Stigma And Barriers Among The Latino Community, Noemi Toraya

Electronic Theses, Projects, and Dissertations

Being faced with a lack of awareness of mental health in the Latino community has brought much attention to the reasons why Latinos lack treatment or choose not to get treated. In Latino culture, mental health is a construct of society, a label applied to justify not being able to function, work, or be present. For many Latinos who experience mental health problems, getting treatment is critical. However, there are several obstacles to overcome, one of which is the stigma associated with mental health and how it is viewed in the Latino community. In Latino communities, stigma sometimes involves associating …

Learning A Second Language In A Second Language: Bi/Multilingual Students’ Experiences In Stem, Lara L. Spence

Electronic Theses, Projects, and Dissertations

Drawing on qualitative interview data from undergraduate students at a public university in California, this thesis conducts a Critical Discourse Analysis (CDA) of the experiences of bilingual and multilingual STEM students as they navigate language barriers in higher education. Specifically, it examines how disciplinary sublanguage, defined as the specialized vocabulary and communication practices unique to an academic field of study, and dominant language ideologies (e.g., monoglossic ideology, the English-only movement, etc.) gatekeep students’ access to knowledge, participation, and academic success. To do so, this thesis employs Fairclough’s three-dimensional model of CDA to connect individual experiences with broader institutional and societal …

Can Carpobrotus Edulis Cause Significant Changes To The Soil Microbiome?, Samantha J. Cowan

Electronic Theses, Projects, and Dissertations

Invasive species cause significant damage to ecosystem biodiversity and can cost billions of dollars to restore native species (Van der Wal et al, 2008; Diagne et al., 2021).  In certain instances, even if the invasive species are removed, they can leave legacy effects on the environment that make restoration more challenging (Conser and Connor, 2008; Elgersma et al., 2011). Carpobrotus edulis is an invasive species of plant that is known to cause changes to its environment such as affecting the soil nitrogen cycle and the pH, potentially leading to persistent changes in the soil microbiome and causing native species to …

Separating And Identifying Delta-8-Thc And Delta-9-Thc On Gc/Ms, Ann Schmidt

Honors Projects

Delta-8-THC and delta-9-THC are two psychoactive compounds found in marijuana products which are only distinguishable from each other by alternating the location of a single double bond.  This makes them a challenge to separate and identify as different compounds using the GC/MS.  These isomers are legally recognized as the different compounds, so being able to identify delta-8 and delta-9 THC separately is crucial to forensic analysis. The goal of this research project is to optimize an Intuvo 9000 GC connected to a standard MS to be able to separately and prominently identify delta-8-THC and delta-9-THC in a sample.  This was …

Constraint-Aware Metaheuristic Optimization For Experimental Design, Benjamin N. Fuller

All Graduate Theses and Dissertations, Fall 2023 to Present

Designing experiments becomes much more challenging when many variables and strict constraints are involved, as is common in modern science and engineering. This thesis introduces a new computational and mathematical framework that efficiently searches for optimal experiments in complex, high-dimensional spaces where traditional methods fail. By combining geometric techniques with flexible optimization algorithms like particle swarm optimization, our methods handle difficult constraints while scaling to real-world problems. Built in the high-performance Julia programming language and released as open-source software, this work bridges advanced theory with practical tools, offering researchers a powerful and accessible way to design better experiments under realistic …

A Mixed-Methods Investigation Of Physician Compassion In Consultations For Chronic Primary Pain, Sarah Daehler

All Graduate Theses and Dissertations, Fall 2023 to Present

Chronic primary pain refers to physical pain that has no apparent organic cause, cannot be explained by another condition, and has associated psychological distress or functional impairment. Chronic primary pain is common and can significantly interfere with functioning, including occupational or social functioning. Research has shown that physicians struggle to treat this population, with many physicians reporting feeling unequipped and many patients feeling that their physicians are unhelpful and dismissive. Compassion may play a key role in improving these difficult interactions. The present study analyzed a sample of 99 participants with chronic pain and 100 healthy controls to learn more …

Impact Of Social Worker Bias On African American Fathers With Open Children Family Services Cases, Jenna Espinosa, Cecil Perry, Jasmine Alvarado, Jennifer Garcia, Lacrietia Grate-Dixson

Electronic Theses, Projects, and Dissertations

Systemic barriers and biases within institutions and policies affect how African American fathers engage with Children and Family Services (CFS). According to research, social worker bias, whether overt or covert, can influence case decision-making, affecting fathers' access to resources and overall involvement in their children’s lives. This study aims to quantitatively assess the impact of social worker bias on African American fathers' engagement by evaluating service completion rates at the .21e hearing. A quantitative research design will be utilized by implementing a validated survey to measure social worker bias and case file reviews to assess service completion. Statistical analyses, including …

Glucagon-Like Peptide-1ra As A Public Health Interventions, Briana Sepeda

Electronic Theses, Projects, and Dissertations

Glucagon-like peptide receptor agonist (GLP-1RA) medications have become a prominent topic of interest both in clinical medicine and broader societal discussions. Although the medication are relatively new and expensive, ongoing research continues to explore pharmacologic modifications aimed at improving therapeutic effectiveness and prolonged drug half-life. GLP-1RAs have gained significant traction due to their ability to lower glycosylated hemoglobin (A1c) and blood glucose levels in individuals who have been diagnosed with type 2 diabetes (T2D). In addition to glycemic control, evidence suggests its associations with appetite suppression, weight loss, reducing cardiovascular disease, improved renal dysfunction, neuroprotective effects related to neurodegenerative disease …

Resilience, Stress, And Emotion Regulation In College Students: A Moderated Mediation Model Of Tiktok Engagement, Samuel Bibat, Jon Thang, Hui Zhang, Hannah Carrie, Jessica Golden

Journal of Social, Behavioral, and Health Sciences

This study examined associations between stress, resilience, emotion regulation (ER), and TikTok use. Data were collected from 101 undergraduate students (M_age = 20.04, SD_age = 4.02) at a Midwestern private university. Participants completed self-report measures of TikTok use and intensity (i.e., emotional attachment), resilience, perceived stress, and intrapersonal and interpersonal ER. Mediation and moderated mediation analyses were conducted using PROCESS macro models. Stress mediated the relationship between resilience and TikTok use but not intensity. Interpersonal ER moderated the resilience–stress link, with higher interpersonal ER amplifying the negative association between resilience and stress, which in turn was linked …

Self-Directed Violence In Athletes, Adela Vavrinova

Graduate Theses and Dissertations

Self-directed violence (SDV) in athletes comprises a spectrum of behaviors, including non-suicidal self-injury (NSSI), suicidality, and self-harming behaviors that can be embed- ded within sport contexts. Competitive sport environments may intensify psychological vulnerability through factors such as performance demands, body-image pressures, injury and rehabilitation stress, and norms that discourage help-seeking. This thesis synthesizes existing literature on SDV among athletes with the aim of clarifying how SDV is concep- tualized and measured, summarizing what is known about prevalence patterns, functions, and contextual risk factors, and identifying prevention and intervention strategies relevant to athlete systems. The reviewed evidence suggests the SDV literature …

From Data Digitization To Personalized Care: Deep Learning And Decision Analytics In Healthcare Systems, Ahla Ko

Graduate Theses and Dissertations

This dissertation traces a progression from foundational data infrastructure to individualized clinical decision-making, developing and evaluating three computational frameworks that advance healthcare efficiency and personalization through deep learning and decision analytics. The first study presents an end-to-end pipeline for automated recognition of handwritten medical forms, addressing persistent challenges in health data digitization. Integrating a YOLO-based field detection model, a Convolutional Recurrent Neural Network (CRNN) for text transcription, and a confidence-based human-in-the-loop quality assurance framework, the system achieved 99.75\% Exact Match Accuracy and a 0.13\% Character Error Rate on medical forms collected from a tuberculosis research project in Moldova. A GPU-accelerated …