Digital Commons Network^™

Age-Related Differences In Vehicle Control And Eye Movement Patterns At Intersections: Older And Middle-Aged Drivers, Yusuke Yamani, William J. Horrey, Yulan Liang, Donald L. Fisher

Psychology Faculty Publications

Older drivers are at increased risk of intersection crashes. Previous work found that older drivers execute less frequent glances for detecting potential threats at intersections than middle-aged drivers. Yet, earlier work has also shown that an active training program doubled the frequency of these glances among older drivers, suggesting that these effects are not necessarily due to age-related functional declines. In light of findings, the current study sought to explore the ability of older drivers to coordinate their head and eye movements while simultaneously steering the vehicle as well as their glance behavior at intersections. In a driving simulator, older …

College Student Dating Partner Drinking Profiles: Differences In Relationship Functioning And Relationship-Specific Alcohol Expectancies, Ashley N. Linden-Carmichael, Cathy Lau-Barraco, Michelle L. Kelley

Psychology Faculty Publications

Background: Although the majority of research on partner drinking styles has examined married couples, dating partners may influence one another's problem behaviors including alcohol use.

Objectives: This study identified patterns of at-risk alcohol use in college women and their dating partners using a person-centered statistical approach (i.e., latent profile analysis). Methods: Participants were 286 college student women in dating relationships. They completed questionnaires regarding their own and their partners' drinking, alcohol use severity, intimate partner violence (IPV), relationship satisfaction, and relationship-specific alcohol expectancies. Data were collected in 2012 through 2013.

Results: Results revealed three distinct, latent classes based on both …

Behavioral Couples Treatment For Substance Use Disorder: Secondary Effects On The Reduction Of Risk For Child Abuse, Michelle L. Kelley, Adrian J. Bravo, Abby L. Braitman, Adrienne K. Lawless, Hannah R. Lawrence

Psychology Faculty Publications

Risk for child abuse was examined prior to and after behavioral couples treatment (BCT) among 61 couples in which one or both parents were diagnosed with substance use disorder (SUD). All couples were residing with one or more school-age children. Mothers and fathers completed pretreatment, post-intervention, and 6 month post-intervention follow-up assessments. Results of piecewise latent growth models tested whether the number of BCT sessions attended and number of days abstinent from drugs and alcohol influenced relationship satisfaction and its growth over time, and in turn if relationship satisfaction and change in relationship satisfaction influenced risk for child abuse. For …

Finding Success In Failure: Using Latent Profile Analysis To Examine Heterogeneity In Psychosocial Functioning Among Heavy Drinkers Following Treatment, Adam D. Wilson, Adrian J. Bravo, Matthew R. Pearson, Katie Witkiewitz

Psychology Faculty Publications

Aims- To estimate differences in post-treatment psychosocial functioning among treatment failures' (i.e. heavy drinkers, defined as 4+/5+ drinks for women/men) from two large multi-site clinical trials and to compare these levels of functioning to those of the purported treatment successes' (i.e. non-heavy drinkers).

Design- Separate latent profile analyses of data from two of the largest alcohol clinical trials conducted in the United States, COMBINE (Combined Pharmacotherapies and Behavioral Interventions) and Project MATCH (Matching Alcoholism Treatments to Client Heterogeneity), comparing psychosocial outcomes across derived classes of heterogeneous treatment responders.

Setting- Eleven US academic sites in COMBINE, 27US treatment sites local to …

A Latent Profile Analysis Of Drinking Patterns Among Nonstudent Emerging Adults, Cathy Lau-Barraco, Abby L. Braitman, Amy L. Stamates, Ashley N. Linden-Carmichael

Psychology Faculty Publications

Research indicates that nonstudent emerging adults, as compared to their college-attending peers, are at higher risk for experiencing alcohol-related problems, including alcohol use disorders. The present study sought to extend the limited research on nonstudent drinking by (1) identifying sub-groups of nonstudent drinkers based on their drinking patterns and (2) determining the extent to which social-cognitive between-person factors related to drinking (i.e., social expectancies, perceived drinking norms, social drinking motivations) distinguish these sub-groups. Participants were 195 (65.1% men) nonstudent emerging adult heavy episodic drinkers recruited from the community. Mean age was 21.88 (SD = 2.08) years and 45.4% were unemployed. …

Molly Users Versus Non-Users In A Sample Of College Alcohol Drinkers: Differences In Substance-Related Harms And Sensation Seeking, Ashley N. Linden-Carmichael, Amy L. Stamates, Brynn E. Sheehan, Cathy Lau-Barraco

Psychology Faculty Publications

Background: Molly is one form of MDMA (3,4-methylenedioxymethamphetamine) that is touted to be more pure and potentially less harmful than other forms, such as ecstasy. Media reports and case studies suggest that this drug is popular among college students and is related to adverse health problems. The current study sought to address the knowledge gaps about Molly by examining whether users differ in substance use outcomes and sensation seeking than nonusers. Specifically, this study tested whether Molly users engaged in heavier use of other substances and experienced more substance-related harms in general than nonusers. Further, the current study investigated whether …

Depressive Symptoms And Alcohol-Related Problems Among College Students: A Moderated-Mediated Model Of Mindfulness And Drinking To Cope, Adrian J. Bravo, Matthew R. Pearson, Leah E. Stevens, James M. Henson

Psychology Faculty Publications

Objective: In college student samples, the association between depressive symptoms and alcohol-related problems has been found to be mediated by drinking-to-cope motives. Mindfulness-based interventions suggest that mindfulness may attenuate the conditioned response of using substances in response to negative emotional states, and trait mindfulness has been shown to be a protective factor associated with experiencing fewer alcohol-related problems. In the present study, we examined trait mindfulness as a moderator of the indirect associations of depressive symptoms on alcohol-related problems via drinking-to-cope motives. Method: Participants were undergraduate students at a large, southeastern university in the United States who drank at least …

Alcohol Expectancies Mediate The Relationship Between Age Of First Intoxication And Drinking Outcomes In College Binge Drinkers, Amy L. Stamates, Cathy Lau-Barraco, Ashley Linden-Carmichael

Psychology Faculty Publications

Background: While prior research has shown that age of first intoxication (AI) is associated with negative alcohol outcomes, limited research has examined factors accounting for this relationship. Alcohol expectancies, or beliefs about the effects of alcohol, may explain such associations as both positive and negative expectancies have been shown to be key predictors of drinking outcomes.

Objective: The present study examined expectancies as mediators between early AI and alcohol-related outcomes.

Method: Data collection occurred in 2012 and 2013. Participants were college students (N = 562, 65.8% women) who completed an online survey including measures of alcohol use history, alcohol expectancies, …

Standardized Patient Encounters Periodic Versus Postencounter Evaluation Of Nontechnical Clinical Performance, T. Robert Turner, Mark W. Scerbo, Gayle A. Gliva-Mcconvey, Amelia M. Wallace

Psychology Faculty Publications

Introduction: Standardized patients are a beneficial component of modern healthcare education and training, but few studies have explored cognitive factors potentially impacting clinical skills assessment during standardized patient encounters. This study examined the impact of a periodic (vs. traditional postencounter) evaluation approach and the appearance of critical verbal and nonverbal behaviors throughout a standardized patient encounter on scoring accuracy in a video-based scenario.

Methods: Forty-nine standardized patients scored either periodically or at only 1 point in time (postencounter) a healthcare provider's verbal and nonverbal clinical performance during a videotaped standardized patient encounter. The healthcare provider portrayed in this study was …

The Bread She Earns With Her Own Hands: An Examination Of Lincoln's Political Economy, Rodolfo K. Hernandez

LSU Doctoral Dissertations

This dissertation focuses on how Abraham Lincoln’s idea of “liberty to all” affected his political thought about the intersection of government and the economy. It is a search for Lincoln’s political economy. While contemporary economists focus on a single aspect of the person such as self-interest, Lincoln following thinkers such as Francis Wayland viewed economics as a moral science. I do this by examining the speeches and deeds of Abraham Lincoln. I explore topics such as what he meant by “liberty to all”, his valuing of a commercial society over an agrarian one, and his understanding of the importance of …

Websites Vs. Apps: A Comparison Of Consumer Acceptance Of Apparel Mass-Customization Across Channels, Yuli Liang

LSU Doctoral Dissertations

After 20 years of industrial practice, consumers now can shop for mass-customized apparel in various channels including websites and smart device applications (apps). Online apparel mass-customization (OAMC), which provides platforms and convenience for customers to communicate with retailers effectively, provides retailers with a growing opportunity in today’s evolving omni-channel environment. Meanwhile, product value and experiential value delivered to consumers will help increase customer satisfaction and lower the return rate. However, little is known about consumers’ beliefs, attitudes, and purchase intentions of mass-customized apparels when using different channels. Two studies were intended to fill the research gap. Study 1 is an …

Object Affordances Potentiate Responses But Do Not Guide Attentional Prioritization, Yusuke Yamani, Atsunori Ariga, Yuki Yamada

Psychology Faculty Publications

Handled objects automatically activate afforded responses. The current experiment examined whether objects that afford a response are also prioritized for attentional processing in visual search. Targets were pictures of coffee cups with handles oriented either to the right or the left. Subjects searched for a target, a right-handled vs. left -handled coffee cup, among a varying number of distractor cups oriented in the opposite direction. Responses were faster when the direction of target handle and the key press were spatially matched than mismatched (stimulus -response compatibility (SRC) effect), but object affordance did not moderate slopes of the search functions, indicating …

Psychological And Environmental Predictors Of Test Anxiety: A Structural Equation Model, Meredith Taylor Harris

LSU Doctoral Dissertations

Test anxiety is a construct that includes cognitive, physiological, and behavioral symptoms occurring in response to anxiety prior to, during, or following examinations. The current literature on test anxiety has evaluated a number of possible predictors, including demographic variables, academic indicators, and self-perceptions. The movement toward school accountability and higher academic expectations of students has increased the severity of consequences occurring as a result of poor academic achievement. Thus, test anxiety is a critical concern that may impact student academic success. The current study evaluated a structural equation model to determine the strength of associations between trait anxiety, academic achievement, …

Development Of Functional Markers For Resistance To Leaf Scald In Sugarcane, Andres Felipe Gutierrez Viveros

LSU Doctoral Dissertations

Leaf scald, caused by Xanthomonas albilineans, is a major sugarcane disease worldwide. The disease is managed primarily with resistant cultivars obtained through classical breeding; however, the erratic symptom expression hinders the reliability and reproducibility of the selection process. The development of molecular markers associated with incompatible/compatible reaction can overcome this limitation. Suppression subtractive hybridization (SSH) and quantitative trait locus (QTL) mapping were the strategies used to find leaf scald resistance-associated genes and molecular markers in sugarcane. SSH results showed that genes involved in signal perception and transduction, and DNA binding, were highly expressed in the resistant clone LCP 85-384 compared …

On The Degradation Of Lubricating Grease, Asghar Rezasoltani

LSU Doctoral Dissertations

A comprehensive literature review on physical and chemical degradation monitoring and life estimation models for lubricating greases is presented in chapter one. Degradation mechanisms for lubricating grease are categorized and described, and an extensive survey of the available empirical and analytical grease life estimation models including degradation monitoring standards and methods are presented. In chapter two, irreversible thermodynamic theory is employed to study the mechanical degradation of lubricating grease. A correlation between the mechanical degradation and entropy generation is established and the results are verified experimentally using a rheometer, a journal bearing test rig, and a modified grease worker machine. …

A Novel Recurrent Convolutional Neural Network For Ocean And Weather Forecasting, Robert James Firth

LSU Doctoral Dissertations

Numerical weather prediction is a computationally expensive task that requires not only the numerical solution to a complex set of non-linear partial differential equations, but also the creation of a parameterization scheme to estimate sub-grid scale phenomenon. The proposed method is an alternative approach to developing a mesoscale meteorological model – a modified recurrent convolutional neural network that learns to simulate the solution to these equations. Along with an appropriate time integration scheme and learning algorithm, this method can be used to create multi-day forecasts for a large region. The learning method presented is an extended form of Backpropagation Through …

Essays On Empirical Asset Pricing, Mu-Shu Yun

LSU Doctoral Dissertations

This work contains three essays on empirical pricing. In the first essay, I propose to re-examine the evidence on mutual fund managers' illiquidity and volatility timing ability by using a holdings-based approach, which is free from the artificial timing bias occurred in the traditional return-based timing method. Through testing the timing evidence by the holdings approach, I am able to know to what degree the results in the literature are biased by no-information reasons. In the second essay, I investigate mutual fund managers' skills from their reactions to the observable market condition, which is a relatively overlooked dimension in the …

Paying For Infrastructure In An Urban Environment: Roles Of Ideological Beliefs And Self-Interest In Support For Two Funding Mechanisms, Juita-Elena (Wie) Yusuf, Lenahan O'Connell, Khairul A. Anuar, Kaitrin Mahar

School of Public Service Faculty Publications

This study examines public preferences for two revenue options—fuel taxes and tolls—to finance transportation infrastructure in an urban area with the use of the results of a survey of residents of the Hampton Roads region of southeastern Virginia. Specifically, the study addresses two related research questions: (a) To what extent do residents support instituting tolls, increasing the fuel tax, or both? (b) What roles do self-interest and ideological beliefs play in support of increasing the fuel tax, imposing tolls, or doing both? The study finds that 50% of respondents expressed a willingness to support fuel taxes or tolls for infrastructure, …

Managing For Performance: Measurement And Monitoring Of Contracts In The Transit Industry, Olga Smirnova, Juita-Elena (Wie) Yusuf, Suzanne Leland

School of Public Service Faculty Publications

Public agencies contract out to pursue a variety of goals. But, these goals cannot be realized if the performance of contractors is not assessed and monitored. This study examines the state of performance measurement and contract monitoring in the U.S. transit agencies. We focus on three research questions: (1) What monitoring capacity exists within transit agencies? (2) What monitoring methods are used by transit agencies? (3) What performance measures are tracked by transit agencies? We find monitoring units are common in a third of agencies in the study. Service and customer complaints are the most common performance measures, while penalties …

Spectral Properties Of Photonic Crystals: Bloch Waves And Band Gaps, Robert Paul Viator Jr

LSU Doctoral Dissertations

The author of this dissertation studies the spectral properties of high-contrast photonic crystals, i.e. periodic electromagnetic waveguides made of two materials (a connected phase and included phase) whose electromagnetic material properties are in large contrast. A spectral analysis of 2nd-order divergence-form partial differential operators (with a coupling constant k) is provided. A result of this analysis is a uniformly convergent power series representation of Bloch-wave eigenvalues in terms of the coupling constant k in the high-contrast limit k -> infinity. An explicit radius of convergence for this power series is obtained, and can be written explicitly in terms of the …

Student Internalizing Behavior Screener And Student Externalizing Behavior Screener: An Analysis Of Reliability, Validity, And Usability In Elementary School Populations, Kelsey Lynn Hartman

LSU Doctoral Dissertations

Universal screening for emotional and behavioral risk in schools facilitates early identification and intervention for students as part of multitiered systems of support. Because early intervention has the potential to mitigate adverse outcomes of emotional and behavioral disorders and schools are prime locations to reach at-risk youth, research on the technical adequacy and usability of universal screeners to identify students for available school-based supports is vital. The purpose of this study was to extend existing research by Cook et al. (2011) and Cook, Volpe, and Gresham (2012) on the technical adequacy and usability of two universal screening measures, the Student …

An Investigation Of How Accountability Systems Influence The Design And Development Of Student Centered Learning Environments, Peter James Mathis

Electronic Theses and Dissertations

The research reported in this dissertation investigates the impact that accountability systems have on the design and development of student centered learning environments. The nature of student-centered learning environments (SCLEs) in this study is framed theoretically by cultural historical activity theory (CHAT). The investigation itself occurred within a specific practice context: an urban charter school serving elementary-aged children. The efforts to design and develop SCLEs in the school focused on the use of improvement inquiry by groups of stakeholders organized into a developing human ecology in educational contexts called networked improvement communities. The research sought to determine (1) how accountability …

What Must There Be To Account For Being?, Dillon T. Mccrea

Williams Honors College, Honors Research Projects

The purpose of this essay is to identify what I consider to be core philosophical arguments supporting the thesis that being subsists. The design of the thesis is as follows: First, I will attempt to identify arguments supporting the claim that we posit the universe and all of its content in relation to the question of being. Second, I will identify arguments supporting the claim that it is incoherent to claim that being is merely a function of the existence of individual entities, and that all entities share being in common. Third, I will identify arguments supporting the claim that …

The Effect Of Therapeutic Horseback Riding On Balance And Self-Efficacy In Children With Developmental Disabilities, Alexandra Smola, Lauren Hurley

Williams Honors College, Honors Research Projects

Therapeutic horseback riding (THR) has positive health related outcomes in children with developmental disabilities. The purpose of this study was to determine the effect of a 10-week THR intervention on balance and task-specific self-efficacy in children with developmental disabilities. Bandura’s social cognitive theory and the physical stress theory guided the quasi-experimental study. A pre-test post-test design (N=20) was implemented with a 10-week THR class at a riding center in Midwest United States. The first research question was: In children with developmental disabilities ages 5 to 18, does one 10-week session of THR affect balance? With time 1 balance mean at …

Suicide Prevention: The Professional And Moral Responsibilities Of The Speech-Language Pathologist, Madelyn Anderson

Williams Honors College, Honors Research Projects

The purpose of this paper is to explore the possible connection between suicide and stuttering, identify warning signs and risk factors of suicide as they apply to our clients, and examine the moral implications and professional responsibilities of speech-language pathologists as they pertain to suicide prevention. From the research I conducted, I found that, as a whole, the national community of speech-language pathologists does not recognize any correlation between stuttering and suicide. However, as dictated by the American Speech-Language-Hearing Association’s (ASHA) Code of Ethics, we as speech-language pathologists are obligated to make referrals outside of our profession as the need …

The Effect Of School Based Nursing On Health Related Outcomes In Children: A Review Of Literature, Alexandra M. Pianalto, Mitchell C. Wall

Williams Honors College, Honors Research Projects

Background: School nursing staff deal with acute, chronic, screening, and education issues in the school based clinic. It is the school nursing staff’s role to provide care and treatment to children during school hours.

Purpose: Conduct a systematic review of the literature comparing disposition outcomes of children seen by school nursing staff to answer the PICO question: How does implementation of school based nursing affect health related outcomes in children within and outside the school environment?

Methods: Integrative literature review

Description of Evidence: Twenty research articles chosen from the database CINAHL, articles published within past nine years

Critical Appraisal: …

Calculators In High School Classrooms, Adam P. Rohrabaugh, Clay M. Cooper

Williams Honors College, Honors Research Projects

In today’s mathematics classrooms, calculators are becoming incredibly well known and used almost daily. However, there has been a common question about the use of these calculators: Is too much exposure to calculators causing students to become dependent on them and consequently start to forget basic addition, subtraction, multiplication, and division, leading into confusion on other mathematics topics because the most basic foundation of mathematics is not there? The purpose of this paper is to discuss both sides of this question by looking at different studies as well as provide our own experiences with this subject while working in different …

Protein Sequence-Structure-Function Relationship: Testing Ke-50 Modification On Recombinant Green Fluorescent Protein (Acgfp), Anna E. Burkey

Williams Honors College, Honors Research Projects

Protein modification shows promise for improving the effectiveness of protein therapy, including the use of Interferon-beta-1b for the treatment of multiple sclerosis. The addition of a chain of 50 lysine and glutamic acid residues (also called a KE50 modification) was tested on green fluorescent protein (AcGFP) to determine its effect on the bioactivity of the protein. Standard transformation protocol was used to grow the normal and modified proteins in E.Coli, and the bioactivity of the protein was measured using quantum yield and extinction coefficients to determine the reduction in brightness from the native form to the modified form. The …

The Takeover Of Standardized Tests, Karlie M. Lieberth

Williams Honors College, Honors Research Projects

Diane Ravitch once said, “Sometimes the most brilliant and intelligent students do not shine in standardized tests because they do not have standardized minds”. Standardized testing is a very controversial issue occurring in our school systems today. Standards hold schools and teachers accountable for properly progressing our youth through school. However, is administering the same exact test to every child in every school district the best way to measure growth? There are many factors that makes up a school and student body such as poverty, cultural beliefs etc. These factors are not addressed in the standardized tests that our students …

Lipid-Protein Interactions Via Fluorescence Quenching In Small Unilamellar Vesicles, Talia Kordahi

Williams Honors College, Honors Research Projects

Studying peptide interactions with model membranes have aided in understanding protein-lipid interactions more clearly. In this report, fluorescent small unilamellar vesicles (SUVs) of a known composition were made. Two peptides, RND1 and MARCKS, were also fluorescently labeled and added to a solution of SUVs. The interactions between these were observed via fluorescence quenching, read out with a spectrofluorimeter. In addition, two environments of buffer were tested: 1X PBS and 0.1X PBS. After obtaining data, it was concluded that MARCKS quenched the SUVs more than RND1. This could be due to the presence of more lysine amino acids in MARCKS, which …