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Examining The Interaction Between Stress Exposure And Stress Reactivity As Predictors Of Reward Sensitivity And Anhedonia Symptoms, Joshua Ahles

Clinical Psychology Dissertations

There is a well-documented relationship between stress and depression, although only recently has the field begun to articulate clear models regarding how stress exerts this effect. One prominent model highlights the disruptive impact of stress on reward processing, which relates to anhedonia – a cardinal symptom of depression. Vulnerability-stress models also play an important role in depression research and hold that individual differences in responses to stress may exacerbate the relationship between stress and depression. Pre-ejection period (PEP) reactivity to reward has been posited as an index of reward sensitivity and approach motivation and has been increasingly linked to depression. …

Can They Suffer?, Todd K. Shackelford

Animal Sentience

We should treat sentient nonhuman animals as worthy of moral consideration, not because we share an evolutionary history with them, but because they can suffer. As Chapman & Huffman (2018) argue, humans are not uniquely disconnected from other species. We should minimize the suffering we inflict on sentient beings — whether human or nonhuman — not because they, too, are tool-makers or have sophisticated communication systems, but because they, too, can suffer, and suffering is bad.

The Effects Of Preceding Stimuli Formats On Proportional Reasoning Ability In Elementary School Students, Natalie D. Branch

College of Graduate Studies: Theses & Dissertations

The National Mathematics Advisory Panel (2008) described fraction knowledge as the most important, yet most underdeveloped foundational skill among students. Due to the complex nature of fraction education, this study sought to understand the underlying fraction problem-solving skill of proportional reasoning in the hopes of gaining insight into children’s problem-solving strategies in order to implement more focused educational designs. The current study examined the effects of stimuli formats on children’s proportional reasoning ability by presenting four conditions involving two formats (continuous and discrete). Previous research indicates that students perform better on continuous stimuli and the goal of this study was …

Ecological Uncertainty Influences Vigilance As A Marker Of Fear, Laurence E. A. Feyten, Grant E. Brown

Animal Sentience

We expand on the factors that may shape the predictability of risk and the potential impacts on the links between vigilance and fear, primarily in aquatic prey communities. Uncertainty in predation risks has been shown to induce increased levels of neophobia among prey. As a result of this phenotypically plastic response, prey are faced with risk assessment cues that may vary widely in their reliability. We argue that decomposing predictability may provide useful insights into the relationship between vigilance and fear.

Competing Activities As Measures Of Fear And Vigilance, Ferenc Mónus

Animal Sentience

In animal behavioural research on vigilance, visual signs of alertness are usually used to estimate perceived risk (an internal “fear” state) of free-ranging animals. Different measures of vigilance and competing activities (e.g., predator vigilance, conspecific vigilance, feeding, food handling) provide clues for better understanding vigilance behaviour. How efficiently does an animal in a vigilant/non-vigilant posture devote attention to threats or invest in other activities, such as searching for or handling food? Several species regularly withdraw to a sheltered spot when feeding in an abundant food patch, spending short periods in complete safety. Frequencies of feeding interruptions or false-alarm flights provide …

Effects Of The Nicotinic Agonist Varenicline, Nicotinic Antagonist R-Bpidi, And Dat Inhibitor (R)-Modafinil On Co-Use Of Ethanol And Nicotine In Female P Rats, Sarah E. Maggio, Meredith A. Saunders, Thomas A. Baxter, Kimberly Nixon, Mark A. Prendergast, Guangrong Zheng, Peter A. Crooks, Linda P. Dwoskin, Rachel D. Slack, Amy H. Newman, Richard L. Bell

Psychology Faculty Publications

Rationale: Co-users of alcohol and nicotine are the largest group of polysubstance users worldwide. Commonalities in mechanisms of action for ethanol (EtOH) and nicotine proposes the possibility of developing a single pharmacotherapeutic to treat co-use.

Objectives: Toward developing a preclinical model of co-use, female alcohol-preferring (P) rats were trained for voluntary EtOH drinking and i.v. nicotine self-administration in three phases: (1) EtOH alone (0 vs. 15%, two-bottle choice), (2) nicotine alone (0.03 mg/kg/infusion, active vs. inactive lever), and (3) concurrent access to both EtOH and nicotine. Using this model, we examined the effects of (1) varenicline, a nicotinic acetylcholine receptor …

Predicting Similarity Judgments In Intertemporal Choice With Machine Learning, Jeffrey R. Stevens, Leen-Kiat Soh

Jeffrey Stevens Publications

Similarity models of intertemporal choice are heuristics that choose based on similarity judgments of the reward amounts and time delays. Yet, we do not know how these judgments are made. Here, we use machine-learning algorithms to assess what factors predict similarity judgments and whether decision trees capture the judgment outcomes and process. We find that combining small and large values into numerical differences and ratios and arranging them in tree-like structures can predict both similarity judgments and response times. Our results suggest that we can use machine learning to not only model decision outcomes but also model how decisions are …

Chemical Composition And Safety Of Unrecorded Grain Alcohol (Bai Jiu) Samples From Three Provinces In China, Ian M. Newman, Ling Qian, Niran Tamrakar, Bo-Bo Zhang

Department of Educational Psychology: Faculty Publications

Abstract: About 20% of spirits consumed in China are “unrecorded”, where these spirits are produced in small-scale distilleries and sold outside the systems of taxation and quality control. Researchers visited small distilleries in rural Yunnan, Hubei and Anhui and purchased 56 samples of unrecorded bai jiu. Seven samples of the recorded bai jiu were purchased as reference samples. An independent laboratory conducted a blind analysis of the samples. Results were compared to the standards for unrecorded alcohol adopted by the European Commission’s Alcohol Measures for Public Health Research Alliance (AMPHORA). No samples exceeded the AMPHORA guidelines for methanol, ethyl acetate, …

An Examination Of The Scale Of Accurate Personality Prediction’S (Sapp) Test-Retest Reliability Across A Four-Week Period, Taylor Catherine Anderson

Theses and Dissertations

The questions surrounding how well one can truly know him/herself dates as far back as Ancient Greek times, and answering the question has been a difficult task given the complexity of human beings, and a somewhat subjective term such as the “self.” As science and technology continue to advance, so do the attempts to accurately define self-knowledge. Miller (2000) took defining self-knowledge a step further, and developed a test derived from the Sixteen Personality Prediction Questionnaire (16PF) to measure individuals’ level of self-knowledge how well they know themselves, based on their ability to accurately predict their scores on the 16PF. …

The Dichotomous Model Of Substance Abuse: The Elephant In The Room, Shelby Jones

Murray State Theses and Dissertations

Abstract

Addiction can be defined as a repetitive use of a substance or drug that occurs despite any negative outcomes associated with its use. Substance use addiction affects many different areas of an individual’s life, and is often associated with stigma which can result in shame, secrecy, or rejection. There are many theoretical models behind the etiology and maintenance of substance use addiction that include biological, sociological, physiological, and other factors. This investigation examines college-aged individuals’ beliefs about which theoretical model best explains substance use addiction, and if those beliefs can be manipulated when presented with new or opposing information. …

Creativity, Psychopathology, And Psychological Flexibility, Lee Carpenter

Murray State Theses and Dissertations

The relationship between creativity and impairment in quality of life due to psychological disorder has an unclear relationship. Some studies indicate creativity and psychopathology have a significant relationship (Andreasen, 1987) while other studies indicate the two having no connection at all (Karlsson, 1970). The current study examined (1) what direct correlations exist between creative achievement and quality of life impairment, psychological inflexibility and quality of life impairment, and symptoms of psychoticism and quality of life impairment, and (2) how the indirect relationship between creative achievement and quality of life impairment in the context of symptoms of psychoticism changes at varying …

Testing Performance As It Relates To Academic Self-Concept And Test Anxiety In Students With And Without Adhd, Kyrstin Sutton-Davis

Murray State Theses and Dissertations

Students who are diagnosed with Attention-Deficit/Hyperactivity Disorder (ADHD) comprise 25% of students with disabilities who receive educational accommodations in post-secondary settings, and represent roughly 2 - 4% of college students (Weyandt et al., 2013). However, there are mixed results regarding the efficacy of testing accommodations, specifically extended time, and whether these accommodations may offer an advantage to students with ADHD (Gregg & Nelson, 2012). In addition to extended test time, students with ADHD commonly use minimal disturbance rooms. However, there is little research regarding the efficacy of the accommodation. The relationship among academic self-concept, test anxiety, test performance, and testing …

Neural Correlates Of Nonverbal Social Communication In High-Risk Infants, Casey E. Swick

Master's Theses and Doctoral Dissertations

The aim of this study was to replicate and extend a study by Grossmann and colleagues (2008), examining infant neural responses to gaze in 5-month-olds, to older and high-risk infants. Participants were 9-month-old infants (5 preterm, [3 female]; 12 full term [7 female]) who underwent fNIRS while viewing gaze paradigms. Findings revealed that hemisphere predicted peak oxygenated hemoglobin (HbO₂) across groups and conditions, with higher activation in the left hemisphere across groups. Interaction of group by condition predicted peak HbO₂ value, with an increase in activation in the high-risk group during the averted condition. Participants as random …

A Generative Model Of The Mutual Escalation Of Anxiety Between Religious Groups, F. Leron Shults, Ross Gore, Wesley J. Wildman, Christopher J. Lynch, Justin E. Lane, Monica D. Toft

VMASC Publications

We propose a generative agent-based model of the emergence and escalation of xenophobic anxiety in which individuals from two different religious groups encounter various hazards within an artificial society. The architecture of the model is informed by several empirically validated theories about the role of religion in intergroup conflict. Our results identify some of the conditions and mechanisms that engender the intensification of anxiety within and between religious groups. We define mutually escalating xenophobic anxiety as the increase of the average level of anxiety of the agents in both groups overtime. Trace validation techniques show that the most common conditions …

The Use Of Response Interruption And Redirection (Rird) With Stimulus Control Training For Motor Stereotypy In Children With Autism Spectrum Disorder (Asd), Ambreen Shahabuddin

Master's Theses and Doctoral Dissertations

No abstract provided.

Individual Growth Through Forgiveness: A Multiple Case Study On The Process Of Forgiveness, Bianca Kazoun

Walden Dissertations and Doctoral Studies

Psychology researchers have been gathering information regarding the positive effects of forgiveness, demonstrating that they contribute to better overall physical and emotional wellbeing. Individuals who have suffered a transgression can remain in a place of destructive anger and resentment for years. Long-term, these negative states can have deleterious effects emotionally, physically, and socially. Understanding how to help those who are suffering move past their victimization can have a positive impact. It is therefore important to conduct research to better understand forgiveness through the lived experience of individuals who have experienced some form of victimization. Using evolutionary psychology as the theoretical …

An Exploratory Study Of The Lived Experiences Of Unmarried College-Educated Black Women, Courtney T. Edwards

Walden Dissertations and Doctoral Studies

Although there has been a decline in heterosexual marriages, marriage is still an expectation for adults in the United States. Consequently, unmarried women feel pressured to explain their single marital status. Black women are the least likely to marry, compared to non-Black women and Black men, yet there is limited research addressing the experiences of unmarried Black women. The purpose of this study was to explore the lived experiences of unmarried, college-educated Black women and the effects of cultural and social expectations of marriage. Face-to-face, in-depth interviews were conducted with 10 women. The intersectionality theory was used as the theoretical …

Predictors Of Gambling-Related Problems In Adult Internet Gamblers, Barbaradee Foote

Walden Dissertations and Doctoral Studies

The use of the Internet to gamble has become increasingly prevalent in recent years.

Although researchers have suggested that adult Internet gamblers are at high risk for

developing a gambling disorder, few studies, overall, have been conducted on the effects

of Internet gambling. Furthermore, conflicting research exists regarding what moderates

gambling-related problems. The purpose of this quantitative study was to determine if

age, gender, and emotions prior to the gambling experience are related predictors of

Internet problem gambling severity. A retrospective design was used. The pathways

model was used to support the belief that emotions felt before an Internet gambling …

Survivors' Experiences Of Pet Abuse Within The Cycle Of Domestic Violence, Taylor Chastain Johnson

Walden Dissertations and Doctoral Studies

Domestic violence is a pervasive issue that impacts all members of a household, including pets. There is comprehensive quantitative evidence to suggest that domestic violence and pet abuse commonly co-occur; however, as the personal accounts of pet-owning survivors have started to emerge through qualitative investigation, more research is needed to understand the unique experiences of pet abuse that take place alongside instances of domestic violence. This phenomenological investigation utilized control balance theory and a feminist framework to uncover the experiences of survivors who entered their pets into an animal care program specifically designed to help during times of domestic violence …

Childhood Lead Exposure And Attention-Deficit/Hyperactivity Disorder Symptoms: A Meta-Analysis, Megan Glenn Brown

Walden Dissertations and Doctoral Studies

Lead exposure during childhood is a significant global public health concern as the potential effects of exposure can result in the need for long-term treatment, diminished productivity in society, and financial strain on the health care system. There is strong evidence of a relationship between lead exposure and attention-deficit/hyperactivity disorder (ADHD); however, there is a gap in the current literature regarding the relationship between lead exposure and specific symptoms of ADHD and the strength of that relationship. The purpose of this meta-analysis was to examine and help quantify this relationship. Cohen's d was used as the standardized mean effect size …

Effects Of Occupational Stress On Decision-Making Style In Law Enforcement Officers, Christine M. Crippen

Walden Dissertations and Doctoral Studies

Police officers deal with a variety of stresses from different sources. Organizational stresses have the most effect on police officers, often more than stressful critical incidents. Previous research has indicated that over time, the mundane organizational and operational stresses of the job can result in a variety of effects from psychological to physiological, and this stress can impact police performance and public safety. However, there remains an important gap in the current literature regarding the impact of stress on the decision-making style of police officers. Police officers often make split-second decisions that can affect their life, the public, and other …

Meta-Analysis Of The Effectiveness Magnitude Of Hypnosis On Posttraumatic Stress Disorder Treatment, Gueorgui Klissourov

Walden Dissertations and Doctoral Studies

The increased intensity of modern life and the experiences in combat situations has brought on enormous stress and has led many individuals to develop posttraumatic stress disorder (PTSD). Hypnosis is one of the treatment methods available to professionals and has been proven to provide fast, reliable results in multiple studies. Despite these results, the lack of understanding of the physiological effects of hypnosis on the brain has prevented its use as a common treatment method for PTSD. By examining the differences between the effectiveness of hypnosis in military and civilian populations, the aim of this meta-analysis was to isolate the …

Memory In Adult Female Victims Of Intimate Partner Violence, Jill Waite

Walden Dissertations and Doctoral Studies

Intimate partner violence (IPV) is a national and global health problem. Recent data from the Centers for Disease Control and World Health Organization suggest that 1 in 3 women will become a victim of violence by an intimate partner in her lifetime. Memory and learning have been shown to be affected in in-vivo animal studies under acute and chronic stress conditions. Using Bertalanffy's general systems theory, this study examined the impact of IPV on short-term memory in adult female survivors by comparing their performance to a control group (adult females with no IPV in the past 5 years) on measures …

Childhood Lead Exposure And Adult Verbal Comprehension And Perceptual Reasoning, Carrie A. Wonderly

Walden Dissertations and Doctoral Studies

Lead neurotoxicity is considered a problem in young children and the long-term effects of lead exposure on them have yet to be determined. Studies have been completed to determine how lead exposure has affected children through their most important developmental stages. However, there is a lack of research to uncover any long-term effects lead may have as children enter adulthood. The purpose of this study was to determine long-term effects of lead exposure on IQ. The theoretical foundation for this study is the Cattell Horn Carroll theory of intelligence, which is based on fluid (novel experiences) and crystallized (previous experiences) …

Locus Of Control, Poverty And Health Promoting Lifestyles, Cara Stephenson-Hunter

Walden Dissertations and Doctoral Studies

Despite increased access to care and interventions aimed to change health behavior, socioeconomic health disparities have remained unchanged, even for preventable illness and disease. Health behavior theories and interventions heavily rely on perceptions of control over one's fate and thus ignore populations with low perceptions of personal control. Poverty is associated with an external locus of control (LOC), while both poverty and external LOC are associated with less health protective behavior. The purpose of this quantitative study was to explore the role of LOC as an adaptive response to poverty and to discover the risks and benefits to physical and …

The Impact Of Length Of Stay On Therapeutic Effectiveness Of Multidimensional Treatment Foster Care, Dawn M. Breikss

Walden Dissertations and Doctoral Studies

Youth who are placed in the Multidimensional Treatment Foster Care (MTFC) program come from families with multiple risk factors. The MTFC program is based on social learning theory, which posits that youth learn from modeling those in their environment. It is unclear whether motivation for social learning decreases over time. Past research has indicated that there is an efficacious time period for treatment in the MTFC program (6 to 9 months). The purpose of this quantitative study was to examine the behavior effects of remaining in treatment foster care for an extended length of time. This was measured through pre- …

A Comparison Of Micro-Expression Training Methods, Matthew Patrick Kane

Walden Dissertations and Doctoral Studies

Micro-expressions are brief facial expressions that last for 500 milliseconds or less and show the true emotional state of an individual when he or she is displaying a false emotional state. There are currently 2 different methods to train individuals to recognize micro-expressions-picture-based and video-based. Numerous organizations use micro-expression training as part of a deception detection program, but little research has been conducted on training outcomes, and no research has investigated the difference between the methods. In this quantitative study based on Darwin's theory of the universality of emotional expression, a control group experimental design was used to determine if …

The Relationship Between Religious Practices And Delusional Content Of Christians With Schizophrenia, Latasha Michelle Williams

Walden Dissertations and Doctoral Studies

Religious beliefs and practices are an important source of symptom relief for individuals with schizophrenia; however, it can also be a debilitating source of symptom exacerbation. This quantitative study examined the cognitions and religious life orientations of Christian individuals both with and without a diagnosis of schizophrenia, as measured by the Rust Inventory of Schizotypal Cognitions (RISC) and the Religious Life Inventory (RLI) to examine a baseline for healthy religious cognitions. The aberrant-salience and attribution theories were used to explore the relationship between psychotic stimuli and religious attributions. One hundred and thirty Christian individuals from an outpatient mental health facility, …

Marital Status And Burdensomeness As Risk Factors Of Suicide Ideation In Poststroke Patients, Froso Andreou

Walden Dissertations and Doctoral Studies

Suicide ideation, suicide attempts, and suicide (SISAS) are increased in poststroke patients, yet not everyone who has suffered a stroke is at risk for SISAS. Two risk factors for SISAS, marital status and burdensomeness, may be of particular relevance to poststroke patients. The majority of poststroke patients have a disability that may require help from a family member with basic functions such as dressing and bathing. It was not known if being married decreases risk of SISAS for stoke victims as shown in studies with nonpoststroke subjects or increases risk for SISAS due to its influence on feelings of burdensomeness. …

Between-Group Differences Among Victim Age-Based Typologies Of Juvenile Sexual Offenders, Jennifer Short

Walden Dissertations and Doctoral Studies

Juveniles adjudicated for sexual offenses are often described as homogenous, collectively viewed as inherently dangerous, and subject to specialized legal and clinical interventions. However, empirical studies have identified several typologies suggesting that juveniles adjudicated for sexual offenses are a heterogeneous group with varying degrees of risk and treatment needs. The purpose of this non-experimental between-groups study was to compare family composition, abuse histories, mental health diagnosis, and offense type among a victim age-based typology of juvenile sexual offenders. The theoretical framework that guided this study was developmental-contextual theory. Archival data (N = 105) were collected from Alberta Health Services in …