Extinction Bursts Reexamined: The Role Of Consummatory Time And Response Reallocation, Braden Toler

Graduate Theses, Dissertations, and Problem Reports (ETD)

Two experiments were conducted to examine how the removal of the opportunity to consume reinforcement and the reallocation of that time might account for extinction bursts during within-session transitions from FR 1 to extinction. In Experiment 1, rats and pigeons were trained under FR 1 schedules and subsequently exposed to within-session extinction. Total counts of responses suggested that extinction bursts occurred for each subject, but when adjusted to exclude responses that would have overlapped with food consumption, no bursts were observed. In Experiment 2, pigeons experienced four extinction arrangements: conventional extinction, response-independent reinforcement, conditioned reinforcement, and differential reinforcement of alternative …

Back To The Future Self: Parsing Age Effects In Future Self-Continuity Through Goal Orientation And Life Satisfaction, Laken A. Mooney

Graduate Theses, Dissertations, and Problem Reports (ETD)

Future self-continuity, the psychological feeling of connectedness between the current and the future self, is a relatively novel concept that is associated with and has been used to predict a variety of outcomes. Though work investigating individual differences is comparatively rare, a robust demographic difference found in previous literature is the presence of an age effect, where older adults are more likely to feel a greater connection to their future self than younger adults. This finding has been replicated a number of times, but potential mechanisms behind this observed age-related increase have yet to be fully uncovered. Limited previous work …

Radical Hope Amid Generational Oppression And Puerto Rican Well-Being, Natalia Gomez Giuliani

Theses and Dissertations

Oppressive systems (e.g., colonialism, racism, capitalism) create a disparate distribution of power that, through various mechanisms, negatively impacts the health and well-being of members of the oppressed group. Boricuas have experienced over 500 years of oppression, with the island currently maintaining a colonial relationship with the United States. As these adverse effects of oppression are identified, the need for protective factors (e.g., hope) has emerged. This study explored how islander Boricuas practice radical hope, understand their history of oppression and resistance, and how they perceived it to impact their overall well-being. Utilizing a phenomenological qualitative approach, I conducted 15 semi-structured …

Ai-Based Steganography Method To Enhance The Information Security Of Hidden Messages In Digital Images, Nhi Do Ngoc Huynh, Jiajun Jiang, Chung-Hao Chen, Wen-Chao Yang

Electrical & Computer Engineering Faculty Publications

With the increasing sophistication of Artificial Intelligence (AI), traditional digital steganography methods face a growing risk of being detected and compromised. Adversarial attacks, in particular, pose a significant threat to the security and robustness of hidden information. To address these challenges, this paper proposes a novel AI-based steganography framework designed to enhance the security of concealed messages within digital images. Our approach introduces a multi-stage embedding process that utilizes a sequence of encoder models, including a base encoder, a residual encoder, and a dense encoder, to create a more complex and secure hiding environment. To further improve robustness, we integrate …

Parting The Corn Rows: Nikita Khrushchev’S Visit To Iowa, 1959, Jordan Stiles

Dissertations and Theses @ UNI

On September 23, 1959, Soviet leader Nikita Khrushchev visited Roswell Garst to inspect US hybrid corn and agricultural methods. Khrushchev’s initial reforms are discussed to show why Khrushchev sought agricultural knowledge abroad. The details of Khrushchev’s and Garst’s life regarding their work in agriculture are explored up to the visit. The visit would leave an indelible mark on the USSR and Iowa. Khrushchev and his successors would use Garst’s model for hybrid corn farming as the template for Soviet farming. Garst would use his limelight to catapult his corn diplomacy into action around the world. Lastly, the legacy of Khrushchev’s …

The Correlation Between Working From Home And Depression, Anxiety & Stress And The Moderating Effect Of Parenting, Lauren H. Marshall

Murray State Theses and Dissertations

This thesis explores the impact of working from home on depression, anxiety and stress and whether parenting has a moderating role in its impact. The number of individuals working from home increased dramatically because of the pandemic and many individuals continue to work from home despite the absence of government-issued lockdowns and the diminishing threat of the COVID-19 virus. Earlier pre-pandemic research supports several positive work-related outcomes of working from home; however, little consideration has been given to the long-term impact of this major change in the way we work on individual’s mental health. Social isolation, an increase in sedentary …

Racial And Ethnic Threat And The Accessibility Of The Legal Recreational Cannabis Market In California, Kathryn L. Burnham

Graduate Theses, Dissertations, and Problem Reports (ETD)

Racial and Ethnic Threat and the Accessibility of the Legal Recreational Cannabis Market in California

By Kathryn L. Burnham

Drug prohibition has a racialized history in the United States (US). Cannabis became synonymous with the perceived enhanced criminality of Black and Hispanic populations by the White public. Despite similar prevalence of cannabis use among people who are Black, White, and Hispanic, the vilification and stigmatization of Black and Hispanic cannabis users began in the early 1900s and continued for over a century. As individual states continue to legalize cannabis use and public opinion favors the federal legalization of cannabis, it …

An Intersectional Approach To Examining The Impact Of Cigarette Taxes On Tobacco Use By Urbanization Level, Andrea R. Milstred

Graduate Theses, Dissertations, and Problem Reports (ETD)

Rates of traditional tobacco use have reached a century-level low though not universally with some vulnerable populations continuing high rates of tobacco use, such as those located in geographically isolated areas of the United States (US). Rural populations experience a unique set of challenges (i.e., decreased access to health promoting resources, high density of tobacco retailers, increased pro-tobacco advertising) that compound to produce a “cumulative disadvantage” ultimately increasing their risk of tobacco use. To curb and prevent tobacco use, tobacco control policies, such as excise taxes, can be implemented. At least one study suggests tobacco control policies are less effective …

Media Framing Of The Local And National News Coverage Of The East Palestine Train Derailment, Lauren Delo

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research examined digital news coverage of the East Palestine train derailment to determine the frames and dominant frames used in both local and national coverage of the disaster, and whether these frames differed over time. Specifically, this research used a content analysis of digital newspaper articles from five media outlets—three national level and two local level—and applied the frames identified from Colistra’s (2010) study of print news coverage of the 1972 Buffalo Creek mine disaster. Results revealed significant differences between the most frequently used frames between local and national coverage, shifts in frame usage over time within each media …

Simulated Slot Machine Gambling In Relation To Sign-Tracking, Polina Krom

Graduate Theses, Dissertations, and Problem Reports (ETD)

The propensity to attribute incentive salience to reward-related cues, or sign-tracking (ST) has been linked to addiction in animal models and some initial human data. The current study explores the role of sign-tracking (ST), as a potential risk factor for problematic slot machine gambling, which abundantly features audiovisual reward-related cues, henceforth sensory features. A sample of healthy participants without gambling problems (n = 30) completed a Pavlovian-to-Instrumental Transfer (PIT) paradigm to assess ST propensity and played on a realistic slot machine simulator consisting of two versions: with sensory features (SF+) and without (SF-). Each game version had fixed bet sizes, …

Neurobiological Variables Mediating The Relationship Between Breast Cancer And Sleep Disruption, Brittany Domenique Elliott

Graduate Theses, Dissertations, and Problem Reports (ETD)

Neurobiological Variables Mediating the Relationship between

Breast Cancer and Sleep Disruption

Brittany D. Elliott, MS

Breast cancer is the most commonly diagnosed malignancy in women, with more than two million new cases diagnosed world-wide each year. Improvements in screening technology and diagnostics have increased survival rates, but cancer-associated sleep disruptions persist for the majority of breast cancer survivors well beyond the treatment period. In addition to reducing quality of life, reduced sleep quality is associated with greater incidences of affective dysfunction, reduced treatment efficiency, aggressive cancer progression, increased symptom severity, and increased mortality by all causes. Thus, identifying the variables …

Wildlife Distribution Mapping And Analysis In Gorongosa National Park, Mozambique, Using Site And Satellite Imagery Data, Pinho Joaquim Munhequeira Mr

Murray State Theses and Dissertations

One of Mozambique's most important conservation sites, Gorongosa National Park has seen critical ecological changes over the past several decades resulting from climate variability, habitat loss, and political instability. This research integrates Geographic Information Systems (GIS) and remote sensing to examine the relationship between vegetation dynamics and wildlife population, and distribution. The main goals of this study are to evaluate the spatial distribution of particular wildlife species: buffalo (Syncerus caffer), elephant (Loxodonta africana), hippopotamus (Hippopotamus amphibius), and zebra (Equus quagga), and determine the impact of vegetation density and land cover on their …

The Geography Of Rock Glaciers In The American West, Allison Reese Trcka, Andrew G. Fountain, Bryce Allen Glenn

Geology Faculty Publications and Presentations

Rock glaciers are relatively common in conterminous United States west of the 100° meridian, yet their distribution and number are not well known. Using aerial and satellite imagery, we inventoried the population of rock glaciers, yielding 2,257 rock glaciers totaling 234.28 km² with an area of uncertainty of 7 percent. Of these, 1,561 (155.44 km²) are considered intact (moving) and 696 (76.84 km²) relict. Based on published estimates of ice content, total water-equivalent volume is roughly 2.52 km³. Rock glacier elevations increase from the northwest (Washington) to the southeast (Colorado), following a spatial …

Children’S ‘Playbour’ As Influencers On Social Media: An Investigation Into The Legal And Ethical Issues Surrounding Kidfluencers, Catherine J. Archer, Kate Mirandilla Delmo

Research outputs 2022 to 2026

The legal and ethical concerns around children performing as social media influencers (SMIs) on various social media platforms have been in the spotlight, with the recent world-first decision by the Australian Government to ban social media for those under 16. Social media influence is big business across the globe, with organisations investing in working with influencers to promote their brands and/or ideas. Some children now ‘work’, often managed by their parents, to produce posts that promote brands and ideas on behalf of organisations–not only to other children but also to adults. This paper presents findings of two case studies of …

The Somatechnics Of Journalism: Applying An Embodied Perspective To Enduring Issues In Journalism Studies, Laura Glitsos, Mark Deuze

Research outputs 2022 to 2026

This research applies Somatechnics to the study of journalism and contributes to an emergent epistemological “bodily turn” in the discipline of Journalism Studies. This is a turn toward the body, embodied experience, and the inevitable emotionality of journalism and the journalist as brought forth by Chantal Francoeur and Belinda Middleweek, among others. We invite journalism scholars (and practitioners) to understand journalists’ bodies as sophisticated organic technologies—and to subsequently understand how those bodies are further transmogrified by, and collapsed into, the ever-changing world of news media. We deploy a process of retheorising as a qualitative method in which researchers apply new …

The Role Of Interpersonal Communication With Clients In Supporting Work Effectiveness At Pt. Antavaya Tour & Travel, Dennisa Arofani Aurellia

Journal of Indonesian Tourism and Policy Studies

Humans are social creatures who cannot live without other people around us. Humans also need to communicate with each other in order to become a basic need to share information with each other. Communication is also used as a measure of the effectiveness of a job. Communication is also divided into several meanings, one of which is interpersonal communication. Interpersonal communication is also used in the document division at PT. Antavaya Tour & Travel to support work effectiveness. Generally, the document division of PT. Antavaya Tour & Travel acts as a provider and service provider for making travel documents. Therefore, …

Emotional Balance, Health, And Resilience At The Start Of Covid-19 Pandemic, David Pincus, Bernard P. Ricca, Brooke Jenkins, Julia K. Boehm, Vincent Berardi, Amy C. Moors, David A. Frederick

Psychology Faculty Articles and Research

Self-organizing systems can shift between stability and flexibility in response to perturbation, a potential adaptive mechanism for understanding biopsychosocial resilience. Inverse Power-Law (IPL) structure, a frequency distribution that describes fractal patterns commonly produced by self-organization, produce measurements of stability and flexibility. This study applies these measures to emotional resilience at the start of the Covid-19 pandemic. Ratings of frequency over the past week (1-5 Likert scale) across 12 emotions (six positive and six negative) gathered in mid-April 2020 as part of a survey of adults’ (N = 4,094) pandemic experiences and health in the USA. The distributions of everyone’s emotion …

Systematic Reexamination Of Early Verb Dominance: Verbal And Nonverbal Characteristics Of Caregiver Input And Their Contribution To Long-Term Language Outcomes, Minju Kim, Jeonghee Mun, Gayoung Kim, Solyeon Jeon, Youngon Choi

Psychology Faculty Articles and Research

Early language input to infants varies in lexical composition across languages and contexts. For instance, American-English input emphasizes nouns more than verbs, while Mandarin Chinese and Korean inputs provide more verbs than nouns, the difference of which is considered an influential factor in the child’s early vocabulary acquisition. Furthermore, a possibility was raised that nonverbal input accompanying child-directed language provides additional support for verb meanings in verb-dominant caregiver input. However, these early verb dominance and support patterns have been derived from a handful of studies that examined very small samples. Thus, we aimed to systematically reexamine the verb dominance pattern …

Divided By Fear: The Influence Of Political Beliefs On The Perception Of Extremist Groups, Hannah A. Scott

Electronic Theses & Dissertations (2024 - present)

Acts of violent extremism and support for political violence have increased in the United States over the past decade. Previous studies have primarily focused on the differences in risk perception between White Supremacists and Islamic Extremists/Jihadists, neglecting other ideological movements. This study utilizes data from the fifth wave of the Chapman Survey of American Fears and employs ordinal logistic regression to compare the fear of seven different extremist groups and movements: Islamic Extremists/Jihadists, the Militia/Patriot Movement, White Supremacists, Extreme Environmentalists, Extreme Animal Rightists, Anti-Immigration Groups, and ANTIFA. The findings reveal notable differences across political parties (Democrats, Republicans, and Independents) and …

“A ‘Normal’ Life”: Red Dwarf, Temporality, And The Neuroqueer Absurd, Gretchen B. Graf

Electronic Theses & Dissertations (2024 - present)

The science fiction series Red Dwarf, beginning in 1988 and broadcasting sporadically over the past nearly four decades, takes place more than three million years in the future where human beings have gone extinct. All, that is, except one; the show’s central character, Dave Lister, is the last known living human being in the universe, outliving humanity by remaining in stasis during a radiation leak that killed the rest of the crew of the titular mining ship. Besides Lister, the narrative also focuses on the nonhuman beings that keep him company. Besides residing in the genre of science fiction, …

Self-Preservation: Autobiography As A Form Of Archivization As Seen Through The Life And Poetic Works Of John Clare, Meghan J. Slaff

Electronic Theses & Dissertations (2024 - present)

This paper will look at how the processing efforts of an archivist mirror that of an autobiographer through the shared motivation of adding to the cultural memory or textual canon of a society. For archival purposes, the typical steps of ingesting, preparing, and presenting a collection are creation, capture, arrangement/description, and pluralization. To create an autobiography, writers take the memories that have been created and experienced due to events in their lives and capture those memories via recording in the literary form known as autobiography. These autobiographers then arrange and describe their memories in a way that shows vast similarities …

Essays On Place-Based Policy And Regional Economic Development, Tingting Peng

Electronic Theses & Dissertations (2024 - present)

The first chapter examines the economic impacts of large theme park openings in China from 2000 to 2020 using a newly compiled dataset on county-level theme parks and entrepreneurship. Leveraging the staggered openings of theme parks across various counties, we document three main findings. First, theme park openings lead to a 14% increase in entrepreneurial activities, especially in tourism-related service sectors. This result is robust to the instrumental variable approach, the heterogeneous treatment effect, alternative specification and measurement, and propensity score matching. Second, theme park openings generate spillover effects on neighboring counties within a 50-75 kilometer radius. Third, we identify …

The Intermediate And Remote Effects Of Acute Juvenile Stress Upon Auditory Fear Learning, Recognition Memory, And Anxiety Measures In A Rodent Model Of Ptsd, Laura J. Baron

Electronic Theses & Dissertations (2024 - present)

Abstract

Early-life stress is a risk factor for increased susceptibility to stress- and trauma-related disorders, including Posttraumatic Stress Disorder (PTSD). PTSD is characterized by exposure to trauma that results in exaggerated and extinction-resistant fear responses that persist for over a month. Understanding how the severity of early-life stressors in animal models impacts adult behavior, cognition, and underlying neurobiology could aid in the development of more effective PTSD treatments.

Various early-life stress models, especially in infant rats, have been used to induce stress and assess PTSD like-symptoms. Different stressors impact short- and long-term behavior, with some effects influenced by developmental timing …

Postnatal Programming Of Infant Temperament At 12-Months: A Test Of Lactation Programming Theory, Lydia Bierce

Electronic Theses & Dissertations (2024 - present)

The current study examined how maternal cortisol and breastfeeding duration across the first six months postpartum might relate to infant temperament profile membership at 12 months in 322 low-income Mexican American mother-infant dyads (46.3% male). Results revealed that maternal postnatal cortisol levels were significantly moderated by breastfeeding duration to predict infant temperament profile (β = 0.14, p = .030) such that more maternal cortisol was linked to higher likelihood of belonging to a high positive affect, well-regulated profile when mothers breastfed for above average durations. This suggests that while maternal cortisol in breastmilk might initially shape infant negative temperament, …

Does Type Of Metta Phrase Impact The Acceptability And Utility Of Loving-Kindness Interventions: An Experimental Evaluation, Shannon B. Underwood

Electronic Theses & Dissertations (2024 - present)

Loving-kindness (metta) meditation (LKM) is a widely utilized self-compassion intervention with numerous biopsychosocial benefits. Yet a smaller, emerging body of evidence suggests that LKM is difficult and various barriers impact its accessibility and effectiveness. Relational Frame Theory provides a behavioral and contextual perspective of language and cognition that may help clarify how LKM may yield receptivity or rejection of the practice itself. Prior research examining the role of language in LKM identified specific metta phrases more likely to evoke a coordinated (i.e., sameness/agreement) or oppositional (i.e., rejection/lacking) response, and found that indices of psychological suffering predicted oppositional responding (Underwood, 2023). …

Explaining Mass Shooting Motivations: A Case Survey Analysis Of Us Mass Shootings (2006-2024), Isaiah H. Harris

Electronic Theses & Dissertations (2024 - present)

Research on the motivations behind mass shootings remains inconclusive as these events often lack a singular or explicit cause. The motivations of mass shooters are complex, shaped by the interplay of psychological, social, and ideological factors. While some attacks are clearly driven by extremist beliefs, others appear to stem from less defined forces such as depravity or sadistic intent. Existing typologies, such as Langman’s (2009) analysis of school shooters, offer valuable insight but are limited in scope. This study expands upon previous research by examining U.S. mass shootings from 2006 to 2024 to determine whether such events are more frequently …

Categorical Perception Of The Index Finger As An American Sign Language Phonological Construct, Lareina Hingson, Jeffrey Jack Green, Brooklyn Lorenc

Faculty Publications

In American Sign Language, specific handshapes found in the manual alphabet and/or numbering system (such as the pointed index finger—the number “1”—and its bent counterpart—the letter “x”) are assumed to be phonologically distinct under the rationale that bentness of the finger(s) constitutes a phonemic distinctive feature. This study investigates this notion, building on previous behavioral studies of American Sign Language categorical perception of bentness of the index finger. We examined varying levels of bentness between 180◦ and 90◦ using a scale ranging from the signs BLACK and SUMMER in the standard dialect. Experiment 1 found that when presented with all …

Indigenous Wisdom For Regeneration: Reducing The Knowledge Gap, Sandra Wooltorton

Research outputs 2022 to 2026

The author of this paper uses Indigenous-informed literature and explores the use of a Multispecies Collaboratory to hear place-based voices and practice ways of knowing often denied value by the mainstream. In the Indigenous nation of Australia, the author sets out to learn ways to practice environmental education that build upon aeons of experience at caring for and responding to Country. The starting point is a 2024 paper with three claims, which are: a culture of epistemic violence and denial support the mainstream paradigm which silences Indigenous voices; an Indigenous-informed way of being with living-places can inform the core of …

Animating Soil: Cultivating Young Children's Soil Relations, Jane Merewether, Mindy Blaise, Stefania Giamminuti

Research outputs 2022 to 2026

This article explores young children's relations with soil, drawing on research that positioned soil as animate, lively and interconnected. The paper investigates how animist approaches offered a mode of encounter for children and their teachers, encouraging them to see themselves as part of a larger ecological community. The research began with a "soil biome immersion"experience where teachers engaged with soil through sensory and arts-based experiences. These initial encounters led to further exploration of child-soil relations through experiential learning and storytelling. Children, as active meaning-makers, co-constructed the inquiry through imaginative and sensory engagements. Findings suggest animism cultivates soil relations, challenging traditional …

Exploring How Political Affiliations Influence Trust In Ai Applications, Md Imran Ahsan

Theses and Dissertations

This paper examines the impact of partisanship on public trust in the utilization of Artificial Intelligence (AI) by private and public institutions. This study utilizes data from the “Artificial Intelligence: American Attitudes and Trends” survey (Zhang & Dafoe, 2019). Survey-weighted OLS regression models are employed to examine the variations in trust levels across different private and public institutions. This study hypothesizes that H1: Compared to Republicans, Democrats will report higher levels of confidence in public institutions to develop AI in the best interests of the public. H2: Compared to Democrats, Republicans will report higher levels of confidence in private institutions …