Digital Commons Network^™

Network Analysis Of Cognitive Symptom Domains In Alzheimer's Disease (Ad), Abigail Rose Baily

UNLV Theses, Dissertations, Professional Papers, and Capstones

Alzheimer’s Disease (AD) is a degenerative neurological disease process that results in cognitive and functional declines and ultimately results in death. The pattern and course of cognitive and functional decline has been well characterized in AD, however little is known about the interactions between the symptoms. Network Analysis is a recently developed mathematical approach of examining the interactions between symptoms, by exploring the covariance of symptoms. The current study utilized network analysis to examine the multivariate structural dependencies among cognitive domains known to be affected in Alzheimer’s disease. The sample consisted of 864 older adults (60-90 years old), selected from …

The Factor Structures Of Ability And Trait Emotional Intelligences Relative To General Intelligence And Personality, Nicholas Carfagno

UNLV Theses, Dissertations, Professional Papers, and Capstones

Emotional Intelligence is a popular term used to describe one’s experience with their own emotions and awareness of others’. Although emotional intelligence is thought to be a helpful predictor of various variables such as work performance and wellbeing, there is disagreement within the field of the precise definition and method of measurement. The current study examines two of the most popular models of emotional intelligence, ability and trait models, to determine if they are the same construct or two different constructs that share a moniker. Additionally, both ability and trait emotional intelligences’ factor structures are examined through hierarchical and bifactor …

An Examination Of The History And Evolution Of Senior Adult Theatre Accomplishments That Impact Intergenerational Theatre Of The 21st Century, William Français Charette

UNLV Theses, Dissertations, Professional Papers, and Capstones

This thesis explores senior adult theatre recorded interviews, several text book, internet, and published articles that report on findings conducted by educational scholars regarding senior adults in theatre 60 and older. Subsequent background research reflects on multigenerational accomplishments within historical American Theatre and The American Theatre Association discoveries regarding senior adult theatre. Further inquiries include reflections on The American Theatre Association of Senior Adult Theatre, Liz Lerman’s Dance Exchange of Maryland, Ohio State University Senior Adult Theatre programs, University of North Carolina Center for Creative Retirement, Montgomery County Maryland Senior Theatre program, University of Oregon, Art Age, the history of …

An Examination Of The Role Of Online Reviews For Niche Restaurant Segments: Casino Buffet Restaurants, Tevfik Demirciftci

UNLV Theses, Dissertations, Professional Papers, and Capstones

This dissertation applied hygiene factor (two-factor theory) and rational choice theory to investigate the factors which influence satisfaction for iconic, niche casino buffet restaurants, determine if the factors that impact satisfaction also impact WTP in the same direction and with the same weight, and examine the relationship between those items mentioned in online reviews and WTP in a buffet setting. Two studies were conducted to discover the key attributes of the casino buffet restaurant. In the first study, a qualitative-text analysis-was made to discover satisfiers and dissatisfiers for casino buffet restaurants. In the second study, a quantitative analysis -conjoint analysis-was …

Functional Capacity Profiles In Bipolar Disorder And Schizophrenia, Ashley Sara Emami

UNLV Theses, Dissertations, Professional Papers, and Capstones

Serious mental illnesses (SMIs) often have an onset early in life and go on to produce disability and functional impairment, which require ongoing supportive services and loss of productivity. Bipolar disorder (BD) and schizophrenia (SZ) are two of the most common SMIs. BD and SZ differ in their pattern of neurocognitive performance, which suggests differences in the severity of functional impairment between the illness groups. Within these psychiatric illness groups, subgroups may also be identified using cluster analysis. Evidence points to heterogeneity in functional outcomes in BD and SZ, yet very little research has assessed for subgroups based on functional …

Supporting The Visible Minority: Factors That Impact Part-Time Faculty Intent To Leave, Michelle Marie Dominguez Chavez

UNLV Theses, Dissertations, Professional Papers, and Capstones

Hiring part-time faculty in higher education is beneficial for both institutions and the part-time faculty member. Particularly during times of budget cuts, institutions turn to part-time faculty. However, it is important for institutions to create a positive working environment for part-time faculty in order to ensure that the use of part-time faculty does not create adverse effects on student learning and institutions can retain their faculty as either part-time or assist in their transition into full-time teaching positions. Using the conceptual frameworks of role conflict and ambiguity, working conditions, morale, job satisfaction, and intent to leave, this study aimed to …

How Did The Nra Employ Presidential Election Year Propaganda Against Barack Obama Within The Shifting Paradigm Of The Digital Age?, Rodney James Edgar

UNLV Theses, Dissertations, Professional Papers, and Capstones

The National Rifle Association is one of the most successful lobbying groups in the United States of America. There are a few key elements that contribute to this perfect storm of passion, constitutional rights, misinformation and social division. Perception is often credited with being synonymous with reality. As an influential organization, the NRA has used its platform to spread communication, a practice which is enabled and enhanced by the technology, speed of delivery and vast reach that comes with the information age. The focus of this study will be on two artifacts from the digital archives of the NRA. For …

Water Quality Prediction Based On Machine Learning Techniques, Zhao Fu

UNLV Theses, Dissertations, Professional Papers, and Capstones

Water is one of the most important natural resources for all living organisms on earth. The monitoring of treated wastewater discharge quality is vitally important for the stability and protection of the ecosystem. Collecting and analyzing water samples in the laboratory consumes much time and resources. In the last decade, many machine learning techniques, like multivariate linear regression (MLR) and artificial neural network (ANN) model, have been proposed to address the problem. However, simple linear regression analysis cannot accurately forecast water quality because of complicated linear and nonlinear relationships in the water quality dataset. The ANN model also has shortcomings …

Rejection Sensitivity And The Intent To Seek Medical Help Among Gender Minority Individuals, Kellyann Garthe

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background: As members of a marginalized and socially devalued group, gender minority (GM) individuals regularly experience rejection in healthcare experiences. These rejecting experiences lead to barriers to healthcare access and health disparities. Consequently, GM individuals’ may develop anxious and avoidant attitudes toward their healthcare needs. When considering healthcare, an individual’s inherent attitude informs their intent to seek medical help (ISMH), defined as the attitude that influences one’s decision to seek medical help. When an individual has a hyper-sensitive reaction to perceived rejection, this is termed rejection sensitivity (RS).

Purpose: The purpose of the study was to determine if the independent …

Anxious And Oppositional Behavior Factors In A Community Sample Of Youth With Selective Mutism, Andrew Gerthoffer

UNLV Theses, Dissertations, Professional Papers, and Capstones

Selective mutism (SM) is a childhood disorder characterized by a failure to speak in certain situations (e.g., school, social situations; APA, 2013). SM is best assessed using a comprehensive multimodal strategy (Dow et al., 1995; Krysanski, 2003; Viana et al., 2009; Wong, 2010), including parent reports of a child’s behavior. One commonly used parent report measure is the Child Behavior Checklist (CBCL; Achenbach & Rescorla, 2001). The purpose of the present study was to identify specific CBCL items that may help substantiate SM subtypes in children. The study used confirmatory factor analysis to determine whether a two-factor structure (anxious and …

An Intervention To Increase Nurses’ Knowledge Of Non-Opioid Pain Management In Post-Operative Elective Knee And Hip Replacement Patients, Kristen K. Grunerud

UNLV Theses, Dissertations, Professional Papers, and Capstones

Post-operative pain control is an enduring problem in health care. The extensive use of opioids since the 1980s has contributed to the current opioid crisis in the United States. In response, healthcare providers have begun to use a more biopsychosocial model to address pain control needs of patients. There is a demonstrated gap in knowledge for nurses in this area, and recent changes to hospital accreditation standards include a requirement to demonstrate both education provisions to staff and the use of non-opioid methods to control pain. The purpose of this Doctor of Nursing Practice (DNP) project was to assess, and …

Examination Of The Relationship Between Sport-Specific Thoughts And Emotions And Anxiety And Depression In College Athletes, Marina Elizabeth Harris

UNLV Theses, Dissertations, Professional Papers, and Capstones

Depression and anxiety are prevalent mental health difficulties affecting student athletes, who notoriously reject mental health interventions that are not sport-relevant. This study will assist in understanding the extent to which sport-relevant thoughts and emotions impact depression and anxiety in collegiate athletes. Two-hundred and twenty-five NCAA athletes competing at the Division, I, II, or III level were administered the Sport Interference Checklist (SIC), Test of Performance Strategies (TOPS), Generalized Anxiety Disorder-7 (GAD-7), and Patient Health Questionnaire (PHQ-9). Results of correlational analyses revealed a significant relationship between SIC Dysfunctional Thinking (in training and competition) and anxiety (GAD-7) and depressive (PHQ-9) symptoms, …

A Chc Theoretical Approach To Examining Cognitive And Academic Deficits Among Students With Adhd Using A Three-Battery Approach, Jacqueline Scott Hart

UNLV Theses, Dissertations, Professional Papers, and Capstones

Current research into ADHD and Cattell-Horn-Carroll (CHC) factor scores has been examined (Rowland, 2013; Sjöwall, Roth, Lindqvist, & Thorell, 2013), but few studies have evaluated the discrepancies in CHC factor scores of students diagnosed with ADHD compared to healthy controls using the updated Woodcock-Johnson ® IV (WJ IV™) three-battery configuration. With little research on the WJ-IV three-battery configuration, this study expands on the limited research into the discrepancies among students with ADHD compared to healthy controls using CHC factor scores.

Subjects for this study were obtained from 12 schools in a large urban district in northwestern Arizona and standardization data …

Thermo-Mechanical Modeling And The Application Of Coiled Polymer Actuators In Soft Robotics And Biomimetics, Robert Hunt

UNLV Theses, Dissertations, Professional Papers, and Capstones

Coiled polymer actuators (CPA) are a recently discovered smart material. Due to their large tensile stoke and power densities they are often used as actuators or artificial muscles. CPA’s are fabricated from a polymer fiber, typically nylon, mechanically twisted into a coil or coiled around a mandrel and annealed. When heated over the glass transition temperature they can contract, expand or exhibit torsional actuation, depending on the fabrication method and end conditions.

The fabrication and application of CPA is well documented and has made many innovations in the fields of smart materials, soft robotics and the likes. However, there is …

Three-Dimensional (3d) Characterization Of The Middle Ordoovician (Darriwilian) Strata In The Southern Great Basin, Western United States, Uday Mohamed Baheej Kara Ali

UNLV Theses, Dissertations, Professional Papers, and Capstones

Carbonates are mostly produced in shallow-marine environments and their deposition is sensitive to water depth changes on carbonate platforms. The water depth in depositional environments of a particular carbonate platform is controlled by the interplay of eustatic sea-level change, tectonic subsidence, platform morphology, and depositional rate. Due to the morphological variations of carbonate platforms in different tectonic settings, facies distribution across carbonate platforms varies significantly even during a single eustatic sea-level cycle. Carbonate platforms developed on passive continental margins are thought to be the most stable platforms and their facies distribution is commonly taken as examples in textbook depositional models. …

Effects Of Embedded Tacting Trials And Systematic Prompting On Intraverbal Skill Acquisition, Sarah Ilana Katz

UNLV Theses, Dissertations, Professional Papers, and Capstones

For all students, the ability to communicate is the most fundamental educational outcome leading to academic success (Kearns et al., 2011). Students with autism (ASD), however, demonstrate particular difficulty with spontaneous communication and use of functional language throughout a variety of settings (CDC, 2018), including academic contexts. The framework of verbal behavior and training of tacting and intraverbal responses has been widely used to increase the language for students with autism (Sundberg & Michael, 2001), but these skills do not begin in or generalize to academic contexts, particularly during reading instruction. Embedded instruction (Jimenez & Kamei, 2015) and systematic prompting …

Toward Developing A Valid And Reliable Assessment Of Learners’ Nature Of Engineering Views, Erdogan Kaya

UNLV Theses, Dissertations, Professional Papers, and Capstones

Nature of Engineering (NOE) refers to the epistemological beliefs pertaining to engineering (Antink-Meyer & Brown, 2019; Deniz et al., 2019; Hartman & Bell, 2018; Kaya et al., 2017; Pleasants & Olson, 2019). Given that a person’s engineering values and beliefs can affect how that individual perceives not only certain tasks, but also his/her ability to accomplish them, it is important to support pre-college teachers and students in improving their NOE understanding. This continues to be one of the main goals of pre-college Science, Technology, Engineering, and Math (STEM) education, and has become particularly relevant since the release of the Next …

Experimental Polycrystal Stress Mapping Using Raman Spectroscopy, Genevieve C. Kidman

UNLV Theses, Dissertations, Professional Papers, and Capstones

Stress conditions leading to rock deformation influence how a rock will ultimately deform. However, the internal distribution of stress in an elastically anisotropic rock under load, a precursor to rock deformation, is not well understood. Two models that may describe the distribution of stress in polycrystals include the Reuss bound and stress percolation. The Reuss bound, when applied to a polycrystal, describes isostress on each grain resulting in homogeneous intragranular strain and heterogeneous intergranular strain. The stress percolation model involves a network of strong contacts or force chains containing domains of high stress interwoven through areas of lower stress that …

The Influence Of Cerebellar Transcranial Direct Current Stimulation On Motor Function In Parkinson’S Disease, Lidio Lima De Albuquerque

UNLV Theses, Dissertations, Professional Papers, and Capstones

Parkinson's disease (PD) is the most common movement disorder and the second most common neurodegenerative disorder. PD is characterized by dopaminergic cell loss in the substantia nigra pars compacta, which leads to a reduction in dopamine in the striatum. These physiological mechanisms lead to a number of motor impairments such as bradykinesia, rigidity, tremor, and postural instability that severely limit the ability of individuals with PD to perform many essential daily living activities. Although current pharmacological, surgical, and physical exercise treatment approaches are valuable they are either only mildly effective, expensive, or associated with a variety of side effects. Therefore, …

School Gardens As A Tool To Improve Student Health Outcomes And Increase Parent Engagement In The Clark County School District, Sabina Malik

UNLV Theses, Dissertations, Professional Papers, and Capstones

Background-School Gardens (SG) have been used in student programming to help achieve many goals that include increasing academic achievement, improving nutrition knowledge, attitudes, and behaviors, increasing physical activity rates, instilling eco-consciousness, and increasing student and community engagement. To date, garden programs have predominantly been evaluated by case control studies examining pilot or informal short term implementation without consideration of garden program longevity. The purpose of this study was to evaluate the impact of SGs on student knowledge, attitudes, and behaviors related to nutrition and physical activity, examine student connection to the garden, and to identify stakeholder perceptions of best practices …

Does Wearing Multiple Pairs Of Shoes Influence Injury Rates?, Julien Mihy

UNLV Theses, Dissertations, Professional Papers, and Capstones

Running research has attempted to better understand the causes of movement-related injuries and a large segment of this research revolves around footwear and training regimens. A survey has reported lower injury rates in runners who wore multiple shoes with in a 5-month period. Previous literature lacks the analysis of variables leading to training related decisions and whether wearing multiple pairs of shoes can have an extended influence on injury rates. PURPOSE: To determine whether wearing multiple pairs of shoes has an influence on injury rates. METHODS: A survey was developed to ask participant’s injury related history along with their footwear, …

Sexually Transmitted Infections And The 65 And Older Population: Knowledge And Perceived Risk, Alexus Miranda

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sexually transmitted infections (STI) can impact all persons. Since 2000, the number of STIs has steadily increased among persons aged 50 years and older in the United States (Purpora, 2012). Persons over the age of 60 accounted for the biggest increase of in-office treatments of STIs between 2014 and 2017 (Howley, 2018). The purpose of this study was to use the Sexual Health Model to examine the relationship between various predictors and these persons’ perceived risk of STIs, their STI knowledge, and other barriers that impact the sexual health of persons 65 years of age and older. This study used …

Investigating The Inner Experience Of Individuals Attending Psychotherapy At A Community Mental Health Center, Stefanie A. Moynihan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Although psychotherapy outcome studies sometimes use qualitative methods (e.g., interviews and traditional sampling methods), the majority of those studies rely mainly on quantitative methods (e.g., retrospective self-report progress-monitoring questionnaires), even when investigating clients’ experience of treatment. However, there are reasons to believe that both qualitative and quantitative methods are substantially flawed—both interviews and self-report questionnaires investigating experience can yield substantially inconsistent findings in comparison to careful, descriptive sampling-based methods such as Descriptive Experience Sampling (DES). To date, there are neither qualitative nor quantitative published studies that explore the everyday, natural inner experience of psychotherapy clients. The current study used DES, …

Musical Meter: Examining Hierarchical Temporal Perception In Complex Musical Stimuli Across Human Development, Sensory Modalities, And Expertise, Jessica Erin Nave-Blodgett

UNLV Theses, Dissertations, Professional Papers, and Capstones

Performing, listening, and moving to music are universal human behaviors. Most music in the world is organized temporally with faster periodicities nested within slower periodicities, creating a perceptual hierarchy of repeating stronger (downbeat) and weaker (upbeat) events. This perceptual organization is theorized to aid our abilities to synchronize our behaviors with music and other individuals, but there is scant empirical evidence that listeners actively perceive these multiple levels of temporal periodicities simultaneously. Furthermore, there is conflicting evidence about when, and how, the ability to perceive the beat in music emerges during development. It is also unclear if this hierarchical organization …

Addressing Disparities In Cross-Cultural Neuropsychological Assessment, Alicia Nuñez

UNLV Theses, Dissertations, Professional Papers, and Capstones

There are existing disparities in Attention-Deficit/Hyperactivity Disorder (ADHD) assessment, diagnosis, and treatment among ethnic/racial minority children. Thus, greater empirical attention must be given to the neuropsychological assessment of Spanish-speaking children to address linguistic diversity and psychometric equivalence of commonly used measures, like the Wechsler Intelligence Scales for Children (WISC), across cultural groups. Therefore, this dissertation addressed the following aims: (I) examined the factor structure of the WISC–Fourth Edition Spanish (WISC-IV Spanish) in Hispanic children with ADHD, (II) evaluated the feasibility of developing short forms of the Spanish version of the WISC to expand the assessment toolbox for Spanish-speaking children with …

Temporal And Spatial Analysis Of The Wage Gap For Women And Underrepresented Minorities In The Architecture, Engineering, And Construction (Aec) Workforce, Saba Nikkhah Manesh

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Architecture, Engineering, and Construction (AEC) industry has failed to solve persistent labor shortage problems or to fill the labor demand in the workforce by recruiting from untapped/underrepresented groups such as Women and Underrepresented Minorities (WUMs). There have been several studies on diversity and inclusion in the AEC industry, but the issue still persists, as the AEC industry has failed to solve these issues. If the industry better understands the status of wage gaps by gender and race, as well as how the industry has performed in terms of providing comparable wages for the workforce over time, along with the …

Examination Of The Influence Of Consumer Preferences For Cognitive Behavioral Treatment Components And Consumer Effort During Treatment Sessions On Child Welfare Outcomes, Christopher Philip Plant

UNLV Theses, Dissertations, Professional Papers, and Capstones

Introduction: The current study is a secondary analysis of one arm of a controlled trial evaluating the efficacy of FBT-CW for mothers identified for concurrent child neglect and substance abuse (see Donohue et al., 2014). FBT-CW is comprised of multiple cognitive behavioral intervention components targeting skill sets that are hypothesized to influence child neglect and/or substance abuse. The primary areas of focus for these interventions include: (a) management of antecedents to substance abuse and/or child neglect, (b) parenting skills training, (c) communication skills training, and (d) job getting and financial management skills. Purpose: The purpose of this study was to …

Awareness Of Apprenticeships Among College Students At A Research University In The Western United States: A Fixed-Convergent Mixed Methods Study, Kendra Vanessa O'Connell

UNLV Theses, Dissertations, Professional Papers, and Capstones

Apprenticeships offer a practical solution to a growing skills gap, youth unemployment and rising school debt in the United States by delivering a low cost, high-skilled, educated, competitive labor force. Government, industry, and educational institutions have increased focus on expanding apprenticeships. However, enrollment and participation in apprenticeships in the United States remains low. Why?

Legislators, educators, and business leaders agree two primary factors contribute to low apprenticeship participation in the United States: lack of awareness and negative perception of apprenticeships. This fixed-convergent mixed-methods study explored only the first factor, awareness of apprenticeships among college students in Nevada.

An original researcher-designed …

Factors Affecting Esophageal Tissue Radiation Response, Latisha T. Pryor

UNLV Theses, Dissertations, Professional Papers, and Capstones

Radiation-induced esophageal cancer can be a deadly and unfortunate secondary outcome of radiotherapy or chronic occupational exposure to radiation. Although the esophagus is known to be a radiosensitive organ, it is under studied and further information regarding how dose and radiation quality impact its sensitivity may provide strategies to prevent esophageal cancer. The purpose of this thesis was to understand factors that play a role in the tissue’s radiosensitivity that may relate to its cancer risk. In this study, we used two esophageal 3D models, as well as both human and mouse cells, to define radiation quality and dose dependent …

Eyewitness Recall And Identification Accuracy: Effects Of Stress In An Extreme Haunt And A Haunted House, William Blake Ridgway

UNLV Theses, Dissertations, Professional Papers, and Capstones

The impact of stress on eyewitness recall and identification accuracy has been studied extensively but with somewhat inconsistent results. Understanding the effects of stress are important if they are to be generalized to victims or witnesses of real crimes. This study consisted of two experiments that used an extreme haunt and a haunted house to examine attendees’ ability to recall details of and identify actors encountered, as a function of state anxiety and in the context of Deffenbacher’s (1994) catastrophe model of memory performance under anxiety. The results showed that physiological (i.e., heart rate) and psychological (i.e., State Anxiety Inventory) …