Digital Commons Network^™

Mechanisms Of Value-Biased Prioritization In Fast Sensorimotor Decision Making, Kivilcim Afacan-Seref

Dissertations and Theses

In dynamic environments, split-second sensorimotor decisions must be prioritized according to potential payoffs to maximize overall rewards. The impact of relative value on deliberative perceptual judgments has been examined extensively, but relatively little is known about value-biasing mechanisms in the common situation where physical evidence is strong but the time to act is severely limited. This research examines the behavioral and electrophysiological indices of how value biases split-second perceptual decisions and the possible mechanisms underlying the process. In prominent decision models, a noisy but statistically stationary representation of sensory evidence is integrated over time to an action-triggering bound, and value-biases …

Motivation And Perceived Barriers For Underrepresented Students Interested In Art Therapy, Michael A. Jesson

Dissertations and Theses

Substantial racial and gender disparities exist in art therapy (AT), with 90% of U.S. art therapists identifying as White and female. This has been identified as a major concern of both practitioners and educators, though little research has been performed. To understand the role of student motivation and barriers to the field, this study recruited 116 undergraduate students academically exposed to AT. Student interest in the field, psychological needs defined by Self-Determination Theory and perceived educational and career barriers were measured. Autonomy, relatedness and competence regarding studies in AT as well as financial barriers were significantly related to interest in …

Free-To-Play? An Examination Of Intrinsic Motivation And Gaming Behaviors In U.S. Female Mobile Gamers, Margot Goldblum

Dissertations and Theses

The prevalence of U.S. female gamers has skyrocketed in recent years, largely due to the popularity of mobile games; however, this population is underrepresented in academic research. The present study aimed to close this gap in the literature by focusing on the motivations and behaviors of adult female mobile gamers in the U.S. It also aimed to capture changes in gaming motivation and behavior resulting from the onset of the COVID-19 pandemic. An online sample of 354 American women 18 to 77 years of age (M = 36.79, SD = 12.38) were surveyed about their motivations for mobile gaming, …

Mindfulness As A Moderator Of The Relation Between Acculturative Stress And Body Dissatisfaction/Eating Disorder Symptoms In Latinx Students, Ariana J. Mackson

Dissertations and Theses

The purpose of this study is to test the theory that mindfulness is an effective coping strategy for reducing acculturative stress and body dissatisfaction/eating disorder symptoms. It was hypothesized that acculturative stress would be associated with more body dissatisfaction/eating disorder symptoms, but this relation was expected to be moderated by mindfulness. It was also predicted that mindfulness would be associated with less acculturative stress and less body dissatisfaction/eating disorder symptoms. Thirty-eight Latinx students were recruited from The City College of New York, CUNY, through the web-based survey participation pool SONA. Participants answered questions assessing their levels of acculturative stress, mindfulness, …

Does Resilience Moderate The Impact Of Children’S Experiences Of Racial And Ethnic Discrimination On Internalizing Problems?, Dahlia Abbas

Dissertations and Theses

This study’s objectives were to investigate how children’s experiences of discrimination impact the severity of their internalizing symptoms, and whether the relation between discrimination and internalizing symptom severity is moderated by resilience. It was predicted that children who had experienced more discrimination would have more severe internalizing symptoms, especially when they have low levels of resilience. Children [N=20; Mean (SD) age= 11.83 (2.50)] receiving low-cost music lessons in northern Manhattan were recruited into a larger study examining how learning music affects cognitive and emotional development. Children were interviewed in-person about experiences of discrimination because of their race/ethnicity using the Perceptions …

Attention Strongly Modulates Reliability Of Neural Response To Naturalistic Narrative Stimuli, Jason Ki

Dissertations and Theses

Attentional engagement is a major determinant of how effectively we gather information through our senses. Alongside the sheer growth in the amount and variety of information content we are presented with through modern media, there is increased variability in the degree to which we ‘absorb’ that information. Traditional research on attention has illuminated the basic principles of sensory selection to isolated features or locations, but it provides little insight into the neural underpinnings of our attentional engagement with modern naturalistic content. Here, we show in human subjects that the reliability of an individual's neural responses with respect to a larger …

To Disclose Or Not To Disclose? Self-Disclosure Of Mental Health In The Workplace, Samantha Margaret Reynolds

Dissertations and Theses

When making the decision to disclose a mental illness, individuals may be met with a number of factors that impact disclosure. This study examines the relationship between self-stigma, psychological safety, social support and self-disclosure of mental illness in the workplace. The present study surveyed 756 participants and found a positive relationship between stigma and self-disclosure as well as a positive relationship between social support and self-disclosure. For work outcomes, there was a negative relationship between both job satisfaction and productivity in relation to self-disclosure. This study potentiates the antecedents and consequences of self-disclosure of mental illness and how it impacts …

Student Sustainability Leadership Development At Portland State University: Developing Holistic Sustainability Leaders, Megan Suzanne Schneider

Dissertations and Theses

In order to address the myriad of social, economic, and environmental challenges the world is facing, we need to be able to engage in leadership that fosters collective action towards sustainable solutions. Higher education is an institution that can equip people with the abilities to engage in sustainability leadership. This master's thesis research explores how students develop sustainability leadership through their college experience. Nine students, who had been identified as sustainability leaders through their participation in the Student Sustainability Center (SSC), a co-curricular sustainability program at Portland State University, were selected to be part of this grounded theory research project. …

The Combined Effects Of Parent And Teacher Involvement On The Development Of Adolescents' Academic Engagement, Nicolette Paige Rickert

Dissertations and Theses

The current dissertation includes two related studies designed to examine the combined effects of parent and teacher involvement on the development of adolescents' academic engagement as they transition to middle school. Previous studies have demonstrated the positive, individual effects of parent and teacher warm involvement on adolescents' engagement in school. However, this research is limited in its focus on only one social partner. Adolescent development is embedded within multiple, dynamic systems, necessitating the examination of both parent and teacher influences. The few studies that have examined parents and teachers together suggest that their combined effects are both cumulative (additive) and …

Systems Isomorphisms In Stochastic Dynamic Systems, Rajesh Venkatachalapathy

Dissertations and Theses

The identification of isomorphisms between disparate systems is an important focus of systems science. Such isomorphisms have not only conceptual and pedagogical value to systems science, but they also provide pragmatic value to specific disciplines by suggesting new ways to model familiar phenomena and by serving as reference models that show how even simple models can generate complex behavior. Specifically, this dissertation looks at certain classes of stochastic dynamic systems (SDS) and shows that similar equations can model phenomena in sociology and psychology. In both disciplines, what is modeled by these SDS isomorphisms is a certain type of reliability, defined …

Statistical Analysis Of Social Network Change, Teresa Danielle Schmidt

Dissertations and Theses

This project explores two statistical methods that infer social network structures and statistically test those structures for change over time: regression-based differential network analysis (R-DNA) and information theory-based differential analysis (I-DNA). R-DNA is adapted from bioinformatics and I-DNA employs reconstructability analysis.

This project applies both R-DNA and I-DNA to analyze Medicaid claims data from one-year periods before (May 2011- Apr 2012) and after (Jan 2013-Dec 2013) the formation of the Health Share of Oregon Coordinated Care Organization (CCO). The formation of CCOs was legislated by the state of Oregon in 2012 with the triple aim of improving health outcomes, reducing …

A Mixed Methods Analysis Of Corpus Data From Reddit Discussions Of "Gay Voice", Sara Elizabeth Mulliner

Dissertations and Theses

In the last decade, there have been a number of public discussions about "gay voice" and "sounding gay." These two phrases often serve as a shorthand for the belief that a listener can determine the sexuality of a speaker based on phonetic qualities found in a speaker's vocal output. However, these expressions are more accurately described as "catch-all" terms for speech that may contain features associated with non-gender conforming stances and personae. Notions about gender and sexuality could be intertwined in complicated ways in this language ideology. Investigating popular discussions of gay-sounding voices could provide information on what people are …

Explaining The Sectarian Violence In The Middle East: A Conflict Analysis Of The Case Study Of Saudi Arabia And Iran, Ahmed Elsayed Eltally

Dissertations and Theses

The Middle East has been rife with conflicts, extremism, and sectarianism in recent decades. Many explanations attribute the rise of sectarianism in the Middle East to the historical divide between Sunni and Shia Muslims, while others attribute it to power or identity concerns. This thesis explores the factors that contributed to the rise of contemporary sectarianism in the Middle East through the case study of Saudi-Iranian rivalry. Drawing on the literature on the history of the Middle East, Islam, theories of international relations, and conflict studies, it underlines how Saudi Arabia and Iran use sectarianism to further their interests. This …

"An Idolatry Of Sound" : Nature, The Natural, And The Castrato's Body In The Eighteenth Century, Caitlin Elizabeth Pala

Dissertations and Theses

The castrati--Italian men castrated before puberty in order to retain their high singing voice--were Europe's first superstars, reaching the height of their popularity in the first few decades of the eighteenth century. While only a tiny percentage of the European population, the castrati embodied many of the significant medical and philosophical questions of the Enlightenment that aimed to understand humanity: human emotion, physiology, sexuality, and culture. As a part of the ongoing debate over what was "natural," the castrati hold an interesting place. At the broadest level, the very existence of the castrati asked what it was to be a …

Bone Mineral Density Of The Common Bottlenose Dolphin, Tursiops Truncatus: A Proposed Model For Monitoring Osteological And Ecosystem Health, James Wright Burrus Powell

Dissertations and Theses

Bone mineral density (BMD) in the pectoral flipper of the common bottlenose dolphin, Tursiops truncatus, was examined to address the need to define a comprehensive target site for clinical osteodensitometric assessment and to establish ranges of observed bone density values for this species. Radii were analyzed using dual energy X-ray absorptiometry (DXA), the accepted standard in human medical studies. Multiple loci within the radius were identified and assessed for their correlation to BMD of the entire bone. Radii BMD were also examined for differences based on sex, age, total body length, handedness, geographical affinity, and nutritional status at time …

The Process Of Establishing Theoretically Grounded Measures Of Science And Chemistry Identity For Use In Undergraduate Chemistry Courses, Kathryn Nicole Hosbein

Dissertations and Theses

Identity has been theorized to aid in student persistence toward science, engineering, technology, and math (STEM) degrees. However, before we can explore the impacts of learning environments on identity, and subsequently persistence, robust measures that can aid in understanding how identity is fostered need to be available. This research study aims to create measures of identity by expanding an existing physics identity framework and contextualizing it to science and chemistry identities. Development of the measures was carried out through two distinct phases that provided evidence for reliability and multiple aspects of validity.

The first phase of the study used qualitative …

Recruitment Marketing: How Do Wellness And Work-Life Benefits Influence Employer Image Perceptions, Organizational Attraction, And Job Pursuit Intentions?, Amy Christine Pytlovany

Dissertations and Theses

A global talent shortage is motivating employers to change the way they approach recruitment. To stay competitive, business leaders are strategizing new ways to attract employees and market their organizations to prospective employees. This research examined the impact of work-life and wellness programs on employer image perceptions (instrumental, symbolic, and experiential) and recruitment outcomes (organizational attraction and job pursuit intentions). It integrated these literatures to inform evidence-based organizational decision-making.

Study materials were developed with pilot testing conducted using Amazon Mechanical Turk (MTurk). Pilot 1 (N = 40) assessed the value of 32 types of benefits across traditional (e.g., health …

Support From Inside Out: Exploring Whether Various Social Supports Assist In Reducing Prison Rule Violations, Sarah Renee Lazzari

Dissertations and Theses

Scholars argue that prison rule violations are a way to assess whether individuals are engaging in prosocial behaviors. Individuals who engage in prosocial behaviors, during periods of incarceration, are less likely to engage in behaviors that result in official rule violations. Decreasing rule violations is one way to work towards a safer prison environment, while also preparing individuals for release. The current study uses cross-sectional data form the 2004 Survey of Inmates in State and Federal Facilities, in order to examine whether multiple types of prisons programs, which will be framed as various types of social supports, influence the frequency …

What Happened To This Child? Identifying Factors That Influence The Identification And Categorization Of Child Maltreatment In The United States, Erika Tullberg

Dissertations and Theses

Background: Research has shown that adverse childhood experiences are strongly linked with health outcomes over the life course, and that child maltreatment – generally defined as physical abuse, sexual abuse, emotional maltreatment and neglect – can have an immediate, negative impact on child health and development and a longer-term impact on adolescent and adult health, including the leading causes of morbidity and mortality in the U.S. With such significant consequences, the accurate identification of child maltreatment is critical.

Child welfare caseworkers are charged with protecting the safety and fostering the well-being of children who have been identified as maltreated or …

Family, School, And Forms Of Capital, Sonja Taylor

Dissertations and Theses

This dissertation contains three separate but related papers, each with a different focus. In the three papers, I sought to gain a deeper understanding of how different forms of cultural and social capital appeared in the relationship between families and schools. The first paper covers an interview study exploring how teachers in elementary school understood and used email to facilitate partnership with parents, a form of social capital that has the potential to benefit families from all class backgrounds. The second paper investigates the relationship between socioeconomic status, bonding social capital and cultural capital; I tested whether social capital affected …

The Impact Of Integrating Traditional Ecological Knowledge In Summer Camps On Middle School Students' Understanding Of The Nature Of Science, SapoóQ'Is WiíIt'es Ciarra Solina Greene

Dissertations and Theses

The Nature of Science (NOS) and traditional ecological knowledge (TEK) have commonalities in the knowledge bases: they are both ways of explaining the natural world; founded on a set of practices and the historical accumulation of knowledge; and part of the education is learning practices and developing knowledge of the concepts that are foundational to the disciplines. Throughout the United States, schools are attempting to strengthen students' understanding of NOS through various approaches, although few have adopted the integration of TEK into curriculum. This research assesses two summer camps for middle school students that are science focused, one with TEK …

Urbanicity As A Moderator Of The Relationship Between Stigma And Well-Being Outcomes For Individuals With Serious Mental Illnesses, Emily Leickly

Dissertations and Theses

During the deinstitutionalization movement in the 1960s, community mental health centers and supportive and affordable housing for people with serious mental illnesses (SMI) was concentrated in economically disadvantaged urban centers. Today, these urban centers are becoming increasingly gentrified and unaffordable for people with SMI. Affordability is no longer synonymous with urban living, and supportive housing for people with SMI is increasingly found in non-urban areas. Given this shift, it is important to understand the potential impacts of non-urban living on people with SMI. Non-urban environments provide potential benefits for the general population, including reduced traffic and increased proximity to the …

Burdern Of Chronic Health Conditions And Healthcare Utilization Among Mobile Populations In Sub-Saharan Africa, Elizabeth M. Ortiz

Dissertations and Theses

Background: Much of public health research in sub-Saharan Africa on mobile occupations, such as truck drivers and sex workers, has focused on HIV risk. However, evidence is emerging to suggest that the HIV epidemic among these groups is coupled with a high prevalence of chronic health conditions (CHC), specifically hypertension, diabetes, and obesity. For people living with HIV, increased risk of CHC may also be linked to HIV-related chronic inflammatory cascade. In Africa, there has been little research on CHC risk factors or patterns of healthcare utilization among mobile populations. Therefore, the objectives of this study are to examine the …

Patient And Provider Perspectives On Sexual History Taking During Gynecological Care: A Pilot Study In An Academic Family Medical Setting In New York City, Ashley M. Chastain

Dissertations and Theses

Background: In the United States (US), women face a number of serious issues concerning sexual health. Current surveillance data indicates that overall rates of bacterial sexually transmitted infections (STIs) are increasing rapidly. While rates of new diagnoses have decreased, the risks of acquiring HIV are still relatively high for some females, specifically Black/African-American women. In New York City (NYC), where this dissertation research was conducted, similar HIV/STI rates exist among females of reproductive age (aged 15-44). Among women in the US, there are also high estimated rates of other sexual health problems, such as sexual anxiety, sexual dysfunction, and intimate …

Hiv, Stigma, And Attribution Of Causal Emotions, Zoe Elizabeth Larson

Dissertations and Theses

Stigmatization of people living with HIV/AIDS is considered a major barrier to the treatment and prevention of HIV/AIDS. Attribution theorists have examined stigmatizing attitudes as a product of causal emotions; to wit, people face greater judgment and stigmatization when their actions are perceived as controllable and less stigmatization when actions are perceived as out of the realms of personal control. The current study examined attribution of causal emotions for three different circumstances of HIV acquisition, which varied in their perceived controllability. The results showed statistically significant differences in participant evaluations of responsibility, blame, and anger. Statistically significant correlations were found …

The Tangle Of Institutional Care And Control At A Shelter For Commercially Sexually Exploited Youth, Liat Tzvia Mayer

Dissertations and Theses

My cultural anthropology master's thesis focuses on the workings of Inanna House, an emergency shelter/residential program for commercially sexually exploited (CSEC) youth in Portland, Oregon. In the summer of 2017, I did participant observation and interviewed youth and direct care staff members at the CSEC shelter I had been working at for 2 years. I begin by situating ideas about domestic minor sex trafficking (DMST) within larger historical, legal, economic, and political contexts. I consider concepts of childhood, race, class, gender, and sexuality on the story of DMST in the United States.

Next, I explore the ways humans and institutions …

The Relationship Between Undergraduate Research Training Programs And Motivational Resources For Underrepresented Minority Students In Stem: Program Participation, Self-Efficacy, A Sense Of Belonging, And Academic Performance, Jennifer Lindwall

Dissertations and Theses

Although calls for a more diverse workforce in biomedical fields have been widespread, racial and ethnic gaps in biomedical degree attainment persist. In order to succeed, URM STEM students must persevere despite numerous challenges and stay continuously motivated on the long road to degree attainment in biomedical disciplines. Past higher education research has identified two key self-appraisals, a sense of belonging and self-efficacy, as crucial for student success. These beliefs, which can serve as motivational resources for students, include students' convictions about whether they are a valued member of their academic community and whether they have what it takes to …

Does X Mark The Applicant? Assessing Reactions To Gender Non-Binary Job Seekers, Kelly Mason Hamilton

Dissertations and Theses

The number of individuals who identify as a non-binary gender has almost tripled over the last 10 years. This growing population, and the legal protection against sex discrimination afforded to them under Title VII, puts a responsibility on employers to better understand their experiences in the workplace. The purpose of the current study was to examine how disclosing a non-binary gender identity when applying for jobs influenced hiring outcomes. Specifically, my study assessed (a) hiring managers' beliefs about non-binary gender identities, (b) how those beliefs impacted hiring managers' perceived ability to provide social support to prospective applicants, and (c) how …

How Does Wasta Bolster Regimes? The Case Of Tunisia, Issrar Chamekh

Dissertations and Theses

This paper aims to highlight the impact of democratization on wasta by examining the everyday performance of wasta, or the use of connections and informal networks to acquire services. Despite its widespread use, I find that it is understudied as an explanatory variable in the literature on democratization and authoritarianism in the Middle East and North Africa, with Tunisia as a case study. In this paper, I argue that wasta can potentially have a consolidating effect on regimes. I examine the ways that wasta is encoded in everyday language. Using literature from Pragmatics, specifically Goffman's dramaturgical model, I find that …

Relationship Between Empathy And Language Proficiency In Adult Language Learners, Mika Sakai

Dissertations and Theses

This study reviews concepts and the mechanism of empathy, and the relationship between empathy and language proficiency, focusing on the aspect of cognitive empathy. It also discusses whether empathy levels could be developed by learning language to a highly proficient level. I compared the empathy levels between high and low proficiency second-language learners to determine if there was correlation between empathy and other factors such as gender, studying abroad, education background, and usage of a second language. I found that there was no relationship between empathy level and language proficiency level; however, there was one between empathy and gender. For …