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Developmental Emergence Of Power-Law Wake Behavior Depends Upon The Functional Integrity Of The Locus Coeruleus, Andrew J. Gall, Badal Joshi, Janet Best, Virginia R. Florang, Jonathan A. Doorn, Mark S. Blumberg

Faculty Publications

STUDY OBJECTIVES:

Daily amounts of sleep and wakefulness are accumulated in discrete bouts that exhibit distinct statistical properties. In adult mammals, sleep bout durations follow an exponential distribution whereas wake bout durations follow a power-law distribution. In infant Norway rats, however, wake bouts initially follow an exponential distribution and only transition to a power-law distribution beginning around postnatal day 15 (P15). Here we test the hypothesis that the locus coeruleus (LC), one of several wake-active nuclei in the brainstem, contributes to this developmental transition.

DESIGN:

At P7, rats were injected subcutaneously with saline or DSP-4, a neurotoxin that targets noradrenergic …

Biological Correlates Of Same Sex Erotic Fantasy And Date Of Birth: An Empirical Study Of 2d:4d Ratios, Rachel Lloyd

Electronic Theses & Dissertations

Based on extensive psychological and embryological research, neurohormonal theory proposes that males and females develop in sexually dimorphic patterns, in large part, because of differential androgen exposure during prenatal development (Kimmel & Weiner, 1995). Likewise, the theory suggests that variations in sexual orientation are also related to differential androgen exposure in prenatal life (Robinson & Manning, 2000). This study examined the ratio of the length of the second finger (2'1 digit) relative to the fourth finger (4th digit), also referred to as 2D:4D, and its relationship to same-sex erotic fantasy. These ratios are sexually dimorphic and are a presumed correlate …

Euthanasia-Related Strain And Coping Strategies In Animal Shelter Employees, Benjamin E. Baran, Joseph A. Allen, Steven G. Rogelberg, Christiane Spitzmüller, Natalie A. Digiacomo, Jennifer B. Webb, Nathan T. Carter, Olga L. Clark, Lisa A. Teeter, Alan G. Walker

Psychology Faculty Publications

Objective—To identify and evaluate coping strategies advocated by experienced animal shelter workers who directly engaged in euthanizing animals.

Design—Cross-sectional study.

Sample Population—Animal shelters across the United States in which euthanasia was conducted (5 to 100 employees/shelter).

Procedures—With the assistance of experts associated with the Humane Society of the United States, the authors identified 88 animal shelters throughout the United States in which animal euthanasia was actively conducted and for which contact information regarding the shelter director was available. Staff at 62 animal shelters agreed to participate in the survey. Survey packets were mailed to the 62 …

Occurrence Of Rumination: Effects Of Feedback Valence, Self-Disclosure, And Social Anxiety, Chun Han Chen

Student Work

Rumination, defined as repetitive and automatic thought reviewing of negative experiences, was the major object to explore. The research contemplated the mechanism facilitating the occurrence of ruminative thoughts. The hypothesis was that negative emotion from depreciated performance as well as the task requiring self-disclosure might instigate the intense discomfort within which rumination might occur. The researcher examined the potential interaction effect of Performance Feedback x Self-disclosure on rumination. In addition, stable individual characteristics of social anxiety might affect rumination. The statistical analysis explored the predictive effect of social anxiety on rumination. When the situation required one to disclose the self …

Enhanced Post-Learning Memory Consolidation Is Influenced By Arousal Predisposition And Emotion Regulation But Not By Stimulus Valence Or Arousal, Kristy A. Nielson, William Lorber

Psychology Faculty Research and Publications

Emotionally arousing stimuli are more memorable than neutral ones and arousal induced after learning enhances later retrieval. However, there is as yet little study of how stimulus qualities might interact with induced arousal and how individual differences might influence the modulation of memory. Thus, the present study examined the effect of arousal induced after learning on memory for words that varied in both arousal and valence quality, as well as the influence of three individual differences factors that are known to influence arousal response: emotional suppression, emotional reappraisal, and arousal predisposition. Seventy-six adults (57 female) viewed and rated 60 words …

An Evolutionary Perspective On Humor: Sexual Selection Or Interest Indication?, Norman P. Li, Vladas Griskevicius, Kristina M. Durante, Peter K. Jonason, Derek J. Pasisz, Katherine Aumer

Research Collection School of Social Sciences

Are people who are funny more attractive? Or does being attractive lead people to be seen as funnier? The answer may depend on the underlying evolutionary function of humor. While humor has been proposed to signal “good genes”, the authors propose that humor also functions to indicate interest in social relationships—in initiating new relationships and in monitoring existing ones. Consistent with this interest indicator model, across three studies both sexes were more likely to initiate humor and to respond more positively and consider the other person to be funny when initially attracted to that person. The findings support that humor …

Developing A Philosophical Profile Of The Individual For Complex Problem-Solving Through Agent-Based Modeling, Ipek Bozkurt

Engineering Management & Systems Engineering Theses & Dissertations

Research that focuses on the emotional, mental, behavioral and cognitive capabilities of individuals has been abundant within disciplines such as psychology, sociology, and anthropology, among others. The main argument made in this dissertation, however, is that a different perspective is necessary in order to gain insight about individuals when facing the complex problems that are presented within engineering and management disciplines. This is done by developing the Philosophical Profile of the Individual (PPI) that uses epistemology, ontology and teleology as underlying dimensions of philosophical predispositions. The epistemology dimension considers whether an individual is an Empiricist or a Rationalist, the ontology …

The Cognitive And Behavioral Effects Of Acute Ethanol Exposure And Acute Ethanol Withdrawal, Natasha Laverne Golden

Psychology Theses & Dissertations

Although ethanol, in the form of alcoholic beverages, is one of the most widely used and abused drugs, little research has focused on cognitive and behavioral impairments relating to acute ethanol withdrawal. The primary purpose of the current study was to determine the effects of acute ethanol withdrawal on cognition and behavior using the radial arm maze (RAM) and the elevated plus maze (EPM). The secondary purpose of the study was to explore the immediate effects of acute ethanol exposure using a repeated acquisition version of the RAM. Sixteen male, Long-Evans rats were used for the study. For acute ethanol …

Gene-Environment Interactions In Attention Deficit Hyperactivity Disorder, Holly Donovan Barnard

Electronic Theses and Dissertations

The overall goal of this project is to advance our understanding of the multifactorial etiology of Attention Deficit Hyperactivity Disorder (ADHD) by testing a diathesis-stress model of gene x environment (g x e) interactions. Although the literature increasingly supports g x e interactions in the manifestation of ADHD, few studies have investigated multiple genetic and environmental risk factors, included direct tests of gene - environment correlations (rG-Es), explored the specificity of interactions to symptom dimensions, or attempted to minimize comparisons. Therefore, utilizing both within-family (FBAT/PBAT) and case-control methodology, this study sought to (1) explore main effects of polymorphisms in the …

Loss Of Shoaling Preference For Familiar Individuals In Captive-Reared Crimson Spotted Rainbowfish Melanotaenia Duboulayi, Erin Kydd, Culum Brown

Sentience Collection

Captive-reared rainbowfish Melanotonia duboulayi showed no preference for familiar individuals in an experiment examining shoaling preferences. Fortnightly re-examination of the shoaling preferences of the captive-reared population showed that the lack of preference for familiar individuals did not alter over an 8 week period. The same experiment performed on laboratory-reared offspring raised in isolated groups for 8 months since hatching also showed no preference for shoals consisting of familiar individuals. In contrast, trials performed on a wild population of M. duboulayi found a strong preference for familiar shoalmates, a result that is consistent with previous studies. The lack of shoaling preferences …

A Comparison Of Four Models Of Delay Discounting In Humans, Todd L. Mckerchar, Leonard Green, Joel Myerson, T. Stephen Pickford, Jade C. Hill, Steven C. Stout

Research, Publications & Creative Work

The present study compared four prominent models of delay discounting: a one-parameter exponential decay, a one-parameter hyperbola (Mazur, 1987), a two-parameter hyperboloid in which the denominator is raised to a power (Green and Myerson, 2004), and a two-parameter hyperbola in which delay is raised to a power (Rachlin, 2006). Sixty-four college undergraduates made choices between hypothetical monetary rewards, one immediate and one delayed, and the fit of the four models to their data was assessed. All four equations accounted for a large proportion of the variance at both the group and the individual levels, but the exponents of both two-parameter …

Joint Attention In Young Children With Autism, Sabrina Jara

Honors Scholar Theses

Autism spectrum disorders (ASDs) are classified as pervasive developmental disorders characterized by social, communicative, and behavioral impairments. According to formal and informal reports, children with ASD present with receptive and expressive language delay. Joint attention (JA: the behavior that occurs when two individuals focus on the same object or event) has been identified as a possible marker of delayed language development in children with ASD. In this study, the JA behaviors in children with ASD were contrasted with initially language-matched typically developing (TYP) children across three visits.

Measures of language, the frequency, duration, and source of initiation of JA episodes, …

Behavioral Implications Of Knockout For The Dyslexia-Risk Gene Dcdc2 In Mice, Dongnhu Truong

Honors Scholar Theses

Several genetic linkage and epidemiological studies have provided strong evidence that DCDC2 is a candidate gene for developmental dyslexia, a disorder that impairs a person’s reading ability despite adequate intelligence, education, and socio-economic status. Studies investigating embryonic intra-ventricular RNA interference (RNAi) of Dcdc2, a rat homolog of the DCDC2 gene in humans, indicate disruptions in neuronal migration in the rat cortex during development. Interestingly, these anatomical anomalies are consistent with post mortem histological analysis of human dyslexic patients. Other rodent models of cortical developmental disruption have shown impairment in rapid auditory processing and learning maze tasks in affected subjects.

The …

Cooperation & Competition Between Navigation Systems In The Rat Brain: The Role Of The Hippocampus And Striatum During A Dissociative Maze Task, Benjamin Gruenbaum

Honors Scholar Theses

While many tend to think of memory systems in the brain as a single process, in reality several experiments have supported multiple dissociations of different forms of learning, such as spatial learning and response learning. In both humans and rats, the hippocampus has long been shown to be specialized in the storage of spatial and contextual memory whereas the striatum is associated with motor responses and habitual behaviors.

Previous studies have examined how damage to hippocampus or striatum has affected the acquisition of either a spatial or response navigation task. However even in a very familiar environment organisms must continuously …

Understanding Death Anxiety In Women With Gynecologic Cancer, Hana Kim

Theses and Dissertations

For most of us, thoughts about our own mortality are largely unconscious, an invisible backdrop to our daily living. However, when forced to face a potentially life threatening event, these otherwise underlying thoughts about human transience rise to consciousness. Given the seemingly inherent link between receiving a cancer diagnosis and developing an increased awareness of one’s own mortality, the present study sought to address the following research question, “What are the experiences and processes by which women with gynecologic cancer construct meaning and manage death anxiety in the face of their cancer diagnosis?” Based on an interpretive grounded theory paradigm, …

Attentional Biases And Ptsd Symptomology In Victims Of Sexual Assault And Motor Vehicle Accidents, Orin R. Redmond

Theses and Dissertations

While the field of change detection and attentional biases has become an increasingly popular area of study and much is already known about Posttraumatic Stress Disorder (PTSD), very little research has been done integrating these two areas. In the present study, we chose to investigate two types of traumatic experiences prevalent in the college population, motor vehicle accidents (MVAs) and sexual assaults. The flicker paradigm, used to measure change detection, was utilized to examine hypersensitivity to environments with threatening stimuli in individuals whom experienced either of these traumas. The paradigm monitored reaction times to identifying changes that took place in …

Diet-Related Changes In Sensitivity To The Pharmacological Effects Of Delta-9-Tetrahydrocannabinol, Mayo Wright

Theses and Dissertations

Recent evidence suggests that sustained consumption of a high-fat diet is associated with reduced CB1 receptor expression in some brain areas. Many of the neuromodulatory functions of endogenous cannabinoids are mediated by the CB1 receptor. The CB1 receptor also mediates the behavioral and physiological effects of delta-9-tetrahydrocannabinol (delta-9-THC), the primary psychoactive constituent of marijuana. While high-fat diets are associated with region-specific changes in CB1 receptor expression, it is not clear whether such changes are behaviorally relevant. To that end, separate groups of male and female rats were placed on either a high-fat diet or a standard diet. Cannabinoid function was …

The Effects Of Priming On Self-Esteem With An Emphasis On Extroversion, Jamie A. Zagar, Danielle C. Merli

Undergraduate Psychology Research Methods Journal

This experiment looked at priming on self-esteem. We were also interested in the differences between extroverts and introverts in relation to priming on self-esteem. A priming message with a graphic was used on the experimental group, while only the graphic (same image) was used for the control group. We measured extroversion between the two groups to look for differences within and between the group conditions, in relation to self-esteem. Participants in the experimental group were expected to have a higher self-esteem. A significant difference was found. The priming condition showed that participants had a higher self-esteem. However, a relationship between …

Animal Pleasure And Its Moral Significance, Jonathan Balcombe

Sentience Collection

This paper presents arguments for, and evidence in support of, the important role of pleasure in animals’ lives, and outlines its considerable significance to humankind’s relationship to other animals. In the realms of animal sentience, almost all scholarly discussion revolves around its negative aspects: pain, stress, distress, and suffering. By contrast, the positive aspects of sentience – rewards and pleasures – have been rarely broached by scientists. Yet, evolutionary principles predict that animals, like humans, are motivated to seek rewards, and not merely to avoid pain and suffering. Natural selection favours behaviours that enhance survival and procreation. In the conscious, …

Animal Behaviour, Animal Welfare And The Scientific Study Of Affect, David Fraser

Emotion Collection

Many questions about animal welfare involve the affective states of animals (pain, fear, distress) and people look to science to clarify these issues as a basis for practices, policies and standards. However, the science of the mid twentieth century tended to be silent on matters of animal affect for both philosophical and methodological reasons. Philosophically, under the influence of Positivism many scientists considered that the affective states of animals fall outside the scope of science. Certain methodological features of the research also favoured explanations that did not involve affect. The features included the tendency to rely on abstract, quantitative measures …

Personality And Leader Emergence In Groups, Rhett M. Smith

Masters Theses and Doctoral Dissertations

Trait-based approaches to leadership have been around for a long time. Starting out as one of the original theories of leadership, research in the area of trait- based perspectives began to slow and give way to other, different domains of predicting leadership in the 1950s. Only recently has there been a revived interest in the trait approaches to leadership. Building on this resurgence, the present study examined the relationship between leader emergence and the Five Factor Model of personality (Extraversion, Agreeableness, Openness to Experience, Neuroticism, and Conscientiousness).

A Positive Development View Of Risk-Taking : Attachment, Mental Health, Internal Control, And Life Engagement, Lauren Michelle Denneson

Dissertations and Theses

Previous research has primarily focused on potential negative outcomes of risk-taking (e.g., Byrnes, Miller, & Schafer, 1999). However, risk-taking may be beneficial for our mental health. Currently, the United States (U.S.) is seeing an increase in the prevalence and incidence of anxiety and depressive symptoms (N1MH, 2002, 2003, 2006; WHO, 2001). At the same time, individuals in the U.S. spend a large percentage of time in low-energy, "time wasting" activities, such as watching television (United States Department of Labor, 2007), which is in discord with how our stress response functions optimally (Sapolsky, 1998; Dhabhar, 2002). Furthermore, attachment theory posits a …

Perceived Danger And Judged Likelihood Of Restoration, Thomas R. Herzog, Ashley E. Rector

Peer Reviewed Articles

The authors investigated the impact of perceived danger on judged likelihood of restoration. Participants imagined that they were in a state of directed attention fatigue and then that they were taking a walk in a potentially restorative setting. The authors varied two properties of the setting in a factorial design. The setting was either a nature trail or a busy urban street, and it contained either no obvious source of danger or an ominous stalker. Measures of perceived danger and of judged likelihood of restoration were obtained. For both types of measures, in the low-danger condition the two setting categories …

The Effects Of Prenatal Exposure Of Valproic Acid On Cranial Nerve Nuclei: A Rat Model For An Autistic Phenotype, Shannon Pickup

Renée Crown University Honors Thesis Projects - All

Autistic spectrum disorder is a term referring to five pervasive developmental disorders characterized by impairment in social interaction, deficits in verbal and non-verbal communication and stereotyped repetitive behaviors and interests. The underlying brain injury that leads to autism is also unknown. The cause is also unknown but appears to be a combination of genetic and environmental factors. A study on prenatal thalidomide exposure found patients exposure on days 20-24 of gestation lead to a 1/3 rate of autism, a huge increase from the 1/150 rate of the general population. The thalidomide data suggests the initial injury leading to autism occurs …

Adult Estimation, Eye Movements And Math Anxiety, Robert T. Durette

UNLV Theses, Dissertations, Professional Papers, and Capstones

In this experiment the estimation ability of college undergraduates was examined using a number line task, with lines numbered 0-to-100, 0-to1,000 and 0-to-723 presented on a computer monitor. Previous research on kindergarteners' through 6^th graders' ability to estimate showed a progression from a logarithmic mental representation of numbers to a linear mental number line. Children's ability to estimate was found to correlate strongly with math achievement. We used this task to examine the hypothesis that remnants of the underlying logarithmic number line representation persist into adulthood despite formal educational experience with the number system (e.g. Dehaene, 1997). 0 to …

An Examination Of The Relationships Among Personality, Religiosity, Spirituality, And Mysticism, Matthew L. Campbell

Masters Theses and Doctoral Dissertations

Empirical research has demonstrated differences between religiosity and spirituality; the current study further clarifies the constructs by exploring their respective divergent and convergent validities in relation to two higher-order factors of the Big Five personality variables, traditionalism and transformation. The current study examines the relationships among personality, spirituality, religiosity and mysticism. Predictions were partially supported. Participants high on traditionalism and low on transformation scored higher in extrinsic religious orientation compared to those low on traditionalism and high on transformation. Participants low on traditionalism and high on transformation did not score higher on spirituality compared to those high on traditionalism and …

The Relationship Between Education About Dress Practices And Change In Perception Of Self-Concept Related To Dress, Jennifer L. Nielson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The influence of an individual's dress practices on his/her sense of self has been studied for many years. Courses such as the Dress and Humanity course at Utah State University have been developed to educate students on the impact of dress on society. In this study, students in the Dress and Humanity course were given a pre-course and post-course survey to determine if self-perceptions related to dress practices underwent a change over the duration of the semester. Significant differences were found in the categories of body image, evaluating self-esteem, and communication of self to others. A relationship was found between …

The Development Of Context-Specific Operant Sensitization To D-Amphetamine, Wesley Paul Thomas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Animal models have previously been used to study tolerance and sensitization using two different procedures that are difficult to compare. Tolerance has been studied by administering a drug to a subject that is engaged in an operant behavior, and sensitization by administering a drug to a subject that is not engaged in an operant behavior. Previous research has shown that sensitization can occur when d-amphetamine is administered to rats emitting an operant behavior for a food presentation. The first goal of the experiment was to show operant sensitization using dose response curves. The second goal of the present experiment was …

Alterations Of High-Energy Brain Metabolites Across Multiple Neurodegenerative Disorders, Jeremy W. Gawryluk

Theses and Dissertations

Brain energy metabolism is vital for many cellular processes including homeostasis and thus disturbances to metabolism can be the cause or consequence of neurodegeneration. Metabolic discrepancies have been hypothesized to be involved but less frequently demonstrated to be manipulated by acute and chronic neurodegenerative disorders such as stroke, traumatic brain injury, and epilepsy. I hypothesized that cerebral energy levels are decreased in my model systems for Alzheimer's disease, Autism, Down syndrome, and HIV-1 dementia and that dietary treatments could enhance energy reserves and protect against neurodegenerative disease. For rodent studies, I utlilized a high-energy head focused microwave irradiation system to …

The Effects Of Dolphin Education Programs On Visitors' Conservation-Related Knowledge, Attitude And Behavior, Lance Joseph Miller

Dissertations

Zoological institutions typically exhibit dolphins in educational programs such as dolphin shows and interaction programs. The goal of these programs is to entertain visitors while increasing their conservation-related knowledge, attitude and behavior towards dolphins and the marine environment. The purpose of the current study was to examine dolphin shows and interaction programs in terms of their effectiveness in meeting these goals. A multi-institutional study was conducted at six different facilities throughout the United States. A repeated measures design was used to examine the knowledge, attitude and behavior of visitors before, immediately after and three months following participation in dolphin shows …