Digital Commons Network^™

Chlordiazepoxide Increases Risky Choice, Devin Andrew Galdieri

Graduate Theses, Dissertations, and Problem Reports (ETD)

Probability discounting is a measure of risky choice that is correlated with maladaptive behavior and psychological disorders. Benzodiazepines are a class of drug on which relatively little risky-choice research has been conducted, particularly under conditions of chronic drug exposure. Chlordiazepoxide, a standard benzodiazepine, was administered to rats that had been trained to respond on a risky-choice task in which a choice was available between a single food pellet with 100% certainty or three food pellets with probabilities of delivery that decreased across each experimental session. During baseline, responding was sensitive to the programmed contingencies and larger-reinforcer choice decreased as the …

Mental Health Advocacy: Building An Interdisciplinary Program For Agriculture Professionals, Abby E. Blankenship, Erica E. Nason, Olivia Hayes, Sebastian Bliss

Contemporary Rural Social Work Journal

The suicide rate among agriculturalists is 3.5 times higher than the general population. A number of external factors related to the farming and veterinary work put individuals in agricultural populations at risk for poor mental health outcomes, including economic variables (e.g. tariffs, market prices), environmental factors affecting yield (e.g. drought, pests), and exposure to difficult or traumatic life events (e.g., mistreatment of animals, loss of crop). Rural values including self-reliance, work orientation, and individualism combined with logistical and systemic barriers to competent behavioral health care further increase risk. Project GROW (Generating Resilience in Our Workforce) is a multifaceted full semester …

A Darker Side Of Venus: An Empirical-Phenomenological Study Of Women's Negative Experiences Encountering Pornographic Imagery, Rebecca Gimeno

Electronic Theses and Dissertations

This empirical-phenomenological study explores the psychological dimensions of negatively encountering a pornographic image. The study includes four participants, all adult women who have had an adverse encounter with a pornographic image within the past five years at the time of the data collection. The recollected experiences of the participants were collected through written narratives as well as semi-structured interviews.

The written narratives and recorded audio interviews were transcribed and subsequently analyzed using an empirical-phenomenological analysis, a process that yielded situated structures. From this analysis, thematic elements of each structure were brought to light. Some of the thematic elements that were …

"Frontline In Mental Healthcare": A Discourse Analytic Clinical Ethnography Of Crisis Intervention Team Trainings For Corrections, Daniel Gruner

Electronic Theses and Dissertations

Throughout the criminal justice system operates a discourse of corrections-reform. This responds to prisoner trauma and resistance by converting them into reforms that strengthen prisons and the larger carceral system while discounting issues of race and class that might undermine institutional legitimacy. The recent adoption of Crisis Intervention Team (CIT) Trainings in corrections is exemplary of corrections-reform discourse. ‘Crisis’ comes from the Greek krinein, meaning ‘to decide.’ The crisis in mental health in prisons involves deciding when to implement what “services” or “programming” for whom.

In this discourse analytic clinical ethnographic study, I focus on the trans-disciplinary corrections …

Evaluating The Use Of Competing Items In A Multiple Schedule During Reinforcement Schedule Thinning, Scott A. Miller

Theses & Dissertations

Multiple schedules are schedules of reinforcement that are often used to facilitate more manageable rates of a replacement behavior such as a communication response following functional communication training as an intervention for destructive behavior. Commonly, reinforcement schedule thinning involves multiple fading steps that can take more than 100 sessions to achieve therapeutic goals. The purpose of this experiment was to evaluate a method for rapidly achieving fading steps in a multiple schedule by including competing items during the extinction interval. Four children diagnosed with autism successfully reached the terminal extinction interval with a ≥80% reduction in problem behavior. Two of …

Structural Connectivity And Immunological Correlates Of Emotion Processing In Children With Chromosome 22q11.2 Deletion Syndrome, Ashley F. P. Sanders

LSU New Orleans Theses and Dissertations

Neurological abnormalities are associated with emotion processing deficits seen in children with neurodevelopmental disorders. Research suggests that inflammatory mechanisms can negatively impact brain structure and function and are thought to play a role in these processing atypicalities. Children with chromosome 22q11.2 deletion syndrome (22q11.2DS) exhibit emotion processing impairments and associated neural abnormalities. We investigated the roles of inflammatory factors and structural connectivity in relation to emotion processing deficits in 28 children with 22q11.2DS and 33 typically developing children (M = 11.12 years old; SD = 2.17). Results indicate poorer social skills and significantly lower emotion recognition scores in children …

Fear Of Positive Evaluation And Negative Affect From Inclusion In Cyberball, Jason Ted Grossman

Arts & Sciences Graduate Student Theses and Dissertations

Fear of positive evaluation (FPE) is a construct related to social anxiety that involves discomfort when receiving positive attention and feedback from others. FPE research has increased over the past decade, and results suggest that it may be an important part of social anxiety for some individuals; however, it is not yet known whether FPE may also include discomfort from being included in social situations. Level of inclusion was hypothesized to moderate the relationship between FPE and negative affect from being over included such that those with high FPE would feel more uncomfortable the more they were included. To test …

Systems Isomorphisms In Stochastic Dynamic Systems, Rajesh Venkatachalapathy

Dissertations and Theses

The identification of isomorphisms between disparate systems is an important focus of systems science. Such isomorphisms have not only conceptual and pedagogical value to systems science, but they also provide pragmatic value to specific disciplines by suggesting new ways to model familiar phenomena and by serving as reference models that show how even simple models can generate complex behavior. Specifically, this dissertation looks at certain classes of stochastic dynamic systems (SDS) and shows that similar equations can model phenomena in sociology and psychology. In both disciplines, what is modeled by these SDS isomorphisms is a certain type of reliability, defined …

Discovering Motor Phenotypes In Autism Spectrum Disorder: A Cross-Syndrome Approach, Daniel Edwin Lidstone

UNLV Theses, Dissertations, Professional Papers, and Capstones

Autism Spectrum Disorder (ASD) is a neurodevelopmental disorder with a behavioral phenotype characterized by persistent deficits in social communication and social interaction accompanied by restricted, repetitive patterns of behaviors, interests, or activities. Currently in the US, approximately 2.5% of children have a diagnosis of ASD. The etiology of ASD is complex, however the disorder does have a strong genetic basis. Specific genetic mutations can lead to neuroanatomical and neurophysiological changes during development resulting in a behavioral phenotype that falls along the ASD spectrum and may result in a diagnosis of ASD. The severity of ASD-specific behaviors falls on a continuum …

Consequences Of Math Anxiety And Stereotype Threat: An Intersectional Perspective, Jennifer E. John Buck

UNLV Theses, Dissertations, Professional Papers, and Capstones

Individuals with science, technology, engineering, and math (STEM) skills are highly valued for their contribution to the U.S. workforce and society. However, women and some people of color enter STEM fields at lesser rates than do White men. Math anxiety and stereotype threat have been found to cause math performance decrements for women and some people of color. Presently, it is not clear how math anxiety and stereotype threat might work together to dually influence math performance and subsequent STEM participation. The current study focuses on a diverse sample of 295 undergraduate students who were randomly assigned to one of …

Young Children’S Knowledge About The Role Of Print In Reading, Molly Farry-Thorn

Arts & Sciences Graduate Student Theses and Dissertations

Children begin to learn about the print in books and the role it plays in reading well before the onset of formal literacy instruction. Young children’s knowledge about precisely what readers are reading when they read books and who is able to read books has been studied primarily through interviews, but conclusions from this research are limited by methodological concerns. Three experiments examined whether pre-readers understand what part of a book is read and whether they distinguish between the skill of reading and the activity of reading. Although pre-readers were typically able to locate the print in a book, they …

Perceptual Precedence Or Increased Effort?: On The Mechanism Of The Small-Picture-Size Advantage In Category Learning, Toshiya Miyatsu

Arts & Sciences Graduate Student Theses and Dissertations

I have previously identified a novel perceptual manipulation that enhances learning of some complex natural categories, and the current dissertation aims to uncover its mechanism. Specifically, learning of categories of tropical fish was enhanced when learned through small pictures (about 2º) compared to large pictures (about 19º). Through analyzing the previous results and extant theories in various domains, I identified two potential mechanisms through which this small-picture-size advantage manifested. The perceptual precedence hypothesis postulates that the processing of local dimensions is prioritized in large pictures and the processing of global dimensions is prioritized in small pictures. Therefore, small picture size …

Do Faces Facilitate Or Distract Children From Attending To Threats?, Sarah A. Skidmore

Senior Honors Projects, 2010-2019

Threatening stimuli may produce an attentional bias in humans, capturing and holding attention to a greater extent than other types of stimuli. Humans rely on others to alert their attention to threats in their environment, and social stimuli, such as faces, have privileged processing compared to nonsocial stimuli. We wanted to explore whether task-irrelevant fearful or neutral faces facilitate, distract, or have no effect on the detection of threatening or neutral images (spiders and frogs, respectively). Three- to-five-year-old children (N=37) completed a visual search task in which they searched for threatening or neutral animals. Consistent with previous literature, we found …

Visual Modulation Of Resting State Α Oscillations, Kelly Webster, Tony Ro

Publications and Research

Once thought to simply reflect passive cortical idling, recent studies have demonstrated that α oscillations play a causal role in cognition and perception. However, whether and how cognitive or sensory processes modulate various components of the α rhythm is poorly understood. Sensory input and resting states were manipulated in human subjects while electroencephalography (EEG) activity was recorded in three conditions: eyes-open fixating on a visual stimulus, eyes-open without visual input (darkness), and eyes-closed without visual input (darkness). We show that α power and peak frequency increase when visual input is reduced compared to the eyes open, fixating condition. These results …

The Relationships Between Brain Function, Brain Structure, And Behavior In Children With Fetal Alcohol Speectrum Disorder, John Pinner

Psychology ETDs

Prenatal alcohol exposure (PAE), the leading cause of childhood developmental disability, has long-lasting effects extending throughout the lifespan. The teratogenic effects of PAE, not always physically discernable, may corrupt brain structure resulting in neural dysfunction. These aberrant effects often result in executive functioning deficits, associated with social and academic difficulties, which hinder typical development. As maternal alcohol use during pregnancy is heavily stigmatized, children without physical dysmorphology often go unreported and untreated; resulting in increased deficiencies compared to those more severely affected who receive early life interventions. This phenomenon requires the discovery of neurophysiological makers of PAE in order to …

Equivalence-Based Instruction To Teach Single-Subject Designs In Higher Education, Griffin Decuir Williams

Electronic Theses & Dissertations

With the increasing prevalence of online courses and instruction, advanced methods to teach technical concepts for students in higher education are of value. Equivalence-Based Instruction (EBI) is an effective, efficient, and empirically validated teaching methodology. This study developed a match-to-sample EBI protocol embedded in CANVAS to teach four common single-subject designs to graduate students. Results were compared between an equivalence group receiving a reduced-intensity EBI protocol and a group receiving a traditional video lecture to serve as the control. The ability of the participants to generalize the trained relations to novel stimuli was also evaluated. Results indicate that the EBI …

The Demography And Practice Of Australians Caring For Native Wildlife And The Psychological, Physical And Financial Effects Of Rescue, Rehabilitation And Release Of Wildlife On The Welfare Of Carers, Bruce Englefield, Steve Candy, Melissa J. Starling, Paul Mcgreevy

Human-Animal Bonds Collection

The rescue, rehabilitation and release of injured and orphaned Australian wildlife is managed by over 20,000 carers, mostly voluntarily. These volunteers experience mental, physical and financial challenges that have not been researched adequately. This study collated the responses (n = 316) to a survey conducted among Australian wildlife carers who actively foster orphaned joeys for hand-raising and injured adult mammals for rehabilitation and release. It confirmed 86% of rehabilitators are female, 70% are over the age of 46 years and their prime motivation is an affinity with animals. The average time spent in the sector is 11.5 years, and the …

Investigating The Relationship Between Gaze Behavior And Audiovisual Benefit Across Various Speech-To-Noise Ratios, Lauren Gaunt

Arts & Sciences Graduate Student Theses and Dissertations

Speech perception improves when listeners are able to see as well as hear a talker, compared to listening alone. This phenomenon is commonly referred to as audiovisual (AV) benefit (Sommers et al., 2005). According to the Principle of Inverse Effectiveness (PoIE), the benefit of multimodal (e.g. audiovisual) input should increase as unimodal (e.g. auditory-only) stimulus clarity decreases. However, recent findings contradict the PoIE, indicating that it should be reassessed. One method for investigating the factors that contribute to AV speech benefit is to examine listeners’ gaze behavior with eye tracking. The present study compared young adults’ (N=50) gaze …

A Comparison Of Neural Decoding Methods And Population Coding Across Thalamo-Cortical Head Direction Cells, Zishen Xu, Wei Wu, Shawn S. Winter, Max L. Mehlman, William N. Butler, Christine M. Simmons, Ryan E. Harvey, Laura E. Berkowitz, Yang Chen, Jeffrey S. Taube, Aaron A. Wilber, Benjamin J. Clark

Dartmouth Scholarship

Head direction (HD) cells, which fire action potentials whenever an animal points its head in a particular direction, are thought to subserve the animal’s sense of spatial orientation. HD cells are found prominently in several thalamo-cortical regions including anterior thalamic nuclei, postsubiculum, medial entorhinal cortex, parasubiculum, and the parietal cortex. While a number of methods in neural decoding have been developed to assess the dynamics of spatial signals within thalamo-cortical regions, studies conducting a quantitative comparison of machine learning and statistical model-based decoding methods on HD cell activity are currently lacking. Here, we compare statistical model-based and machine learning approaches …

Creative Arts-Based Parents Training Program For Parents Of Children With Autism Spectrum Disorder, Jung Eun Park

Expressive Therapies Dissertations

This study evaluated the impact of the Creative Arts-based Parents’ Training (CAPT) program. The 6-week long, creative arts therapy-based program and its impact on parental stress and sense of competence for parents of children with Autism Spectrum Disorder (ASD) was examined. Korean Parenting Stress Index Short-Form (K-PSI-SF) and Korean-Parenting Efficacy Test (K-PET) were used as quantitative measurements. Qualitative data were also collected for the experimental group (n = 17) using questionnaires, art journaling, and a 30 min focus group interview. The control group (n = 15) only participated in quantitative measurements. There was no difference in age between …

Behavioural Risks In Female Dogs With Minimal Lifetime Exposure To Gonadal Hormones, Melissa J. Starling, Anne Fawcett, Bethany Wilson, James Serpell, Paul Mcgreevy

Physiology Collection

Spaying of female dogs is a widespread practice, performed primarily for population control. While the consequences of early spaying for health are still being debated, the consequences for behaviour are believed to be negligible. The current study focused on the reported behaviour of 8981 female dogs spayed before 520 weeks (ten years) of life for reasons other than behavioural management, and calculated their percentage lifetime exposure to gonadal hormones (PLGH) as a proportion of their age at the time of being reported to the online Canine Behavioral Assessment and Research Questionnaire (C-BARQ). We found that 23 behaviours differed between entire …

Human Milk Omega-3 Fatty Acid Composition Is Associated With Infant Temperament, Jennifer Hahn-Holbrook, Adi Fish, Laura M. Glynn

Psychology Faculty Articles and Research

There is growing evidence that omega-3 (n-3) polyunsaturated fatty-acids (PUFAs) are important for the brain development in childhood and are necessary for an optimal health in adults. However, there have been no studies examining how the n-3 PUFA composition of human milk influences infant behavior or temperament. To fill this knowledge gap, 52 breastfeeding mothers provided milk samples at 3 months postpartum and completed the Infant Behavior Questionnaire (IBQ-R), a widely used parent-report measure of infant temperament. Milk was assessed for n-3 PUFAs and omega-6 (n-6) PUFAs using gas-liquid chromatography. The total fat and the ratio of n6/n-3 fatty acids …

Knowledge Level And Attitudes Of University Faculty Regarding Assistance Animals Compared To The General Population, Anna R. Ledonne

Honors College Theses

Assistance animals are becoming a greater presence on college campuses. The purpose of the following study was to explore university faculty’s confidence in defining different types of assistance animals, their knowledge of legal mandates, and their attitudes regarding assistance animals. A survey was issued to university faculty utilizing an online program and included measures from a previous study done by Schoenfeld-Tacher, Hellyer, Cheung, and Kogan (2017), as well as added questions to more specifically address the research questions and sample. This study was used to compare faculty knowledge and the knowledge of the general population. 91 participant responses were analyzed. …

A Macaque Connectome For Large-Scale Network Simulations In Thevirtualbrain, Kelly Shen, Gleb Bezgin, Michael Schirner, Petra Ritter, Stefan Everling, Anthony R. Mcintosh

Brain and Mind Institute Researchers' Publications

© 2019, The Author(s). Models of large-scale brain networks that are informed by the underlying anatomical connectivity contribute to our understanding of the mapping between the structure of the brain and its dynamical function. Connectome-based modelling is a promising approach to a more comprehensive understanding of brain function across spatial and temporal scales, but it must be constrained by multi-scale empirical data from animal models. Here we describe the construction of a macaque (Macaca mulatta and Macaca fascicularis) connectome for whole-cortex simulations in TheVirtualBrain, an open-source simulation platform. We take advantage of available axonal tract-tracing datasets and enhance the existing …

Predator-Induced Fear Causes Ptsd-Like Changes In The Brains And Behaviour Of Wild Animals, Liana Y. Zanette, Emma C. Hobbs, Lauren E. Witterick, Scott A. Macdougall-Shackleton, Michael Clinchy

Brain and Mind Institute Researchers' Publications

© 2019, The Author(s). Predator-induced fear is both, one of the most common stressors employed in animal model studies of post-traumatic stress disorder (PTSD), and a major focus of research in ecology. There has been a growing discourse between these disciplines but no direct empirical linkage. We endeavoured to provide this empirical linkage by conducting experiments drawing upon the strengths of both disciplines. Exposure to a natural cue of predator danger (predator vocalizations), had enduring effects of at least 7 days duration involving both, a heightened sensitivity to predator danger (indicative of an enduring memory of fear), and elevated neuronal …

The Effectiveness Of Oral Retelling As A Reading Comprehension Strategy For Elementary Students With Reading Delays, Brandi Michelle Fontenot

Dissertations

Comprehension is an essential component of reading proficiency that produces long-term gains for learners. However, many upper elementary school-age children struggle with reading comprehension. The purpose of the current study was to evaluate the effects of a self-monitoring intervention on reading comprehension for three elementary school-age children with reading delays. Two studies were conducted. In Study 1, behavioral skills training was used to teach participants the elements of a story retell and how-to self-monitor their own story retells. In Study 2, a multiple baseline design across participants was used to evaluate the effects of self-monitoring on four dependent variables: a) …

Individual Differences In Executive Function And Reappraisal: A Latent-Variable Analysis, Wei Xing Toh

Dissertations and Theses Collection (Open Access)

Cognitive reappraisal is an adaptive emotion regulation strategy that positively impacts various facets of adaptive functioning (e.g., interpersonal relations, subjective well-being). Although reappraisal implicates cognitive processing, a clear consensus concerning the cognitive underpinnings of reappraisal has not yet been reached. Therefore, we examined how executive function (EF)—i.e., three general-purpose control abilities comprising working memory, inhibition, and shifting—are associated with performance-based reappraisal ability and self-reported reappraisal frequency. Using a latent-variable approach, we found that the shared variance among EF tasks (i.e., common EF)—a general goal-management ability that facilitates the active maintenance of task goals—significantly predicted reappraisal ability, but not reappraisal frequency. …

Involuntary Memories After Stressor Exposure: Contribution Of Hormonal Status And Rumination In Women., Samantha C. Patton

Electronic Theses and Dissertations

Women experience fewer traumatic stressors over their lifespan than men, but demonstrate a higher prevalence of major depression and stressor-related disorders as a result of trauma exposure (Breslau & Anthony, 2007; Kessler et al., 2005). Differences in prevalence of stressor-related disorders may partially be due to sex-linked vulnerabilities related to emotional memory. Emotion assists in modulation of memory through neurological processes. This modulation enhances memory for emotional stimuli and can lead to a greater frequency of involuntary recall after stressor exposure. This involuntary memory is also a hallmark symptom of Posttraumatic Stress Disorder (PTSD). Sex-linked vulnerabilities, specifically hormonal status and …

A Comparison Of Cognitive Restructuring And Thought Listing For Excessive Acquiring In Hoarding Disorder, Hannah C. Levy, Randy O. Frost, Elizabeth A. Offermann, Gail Steketee, David F. Tolin

Psychology: Faculty Publications

Excessive acquiring is a common symptom of hoarding disorder (HD). Little is known about subjective distress associated with acquiring in HD. The present study examined acquiring-related distress and reactions to cognitive restructuring (CR) in 92 individuals with HD and 66 community control (CC) participants. All participants identified an item of interest at a high-risk acquiring location and then decided whether or not to acquire the item. HD participants completed the acquiring task while receiving a CR-based intervention or a thought-listing (TL) control condition. Results showed that HD participants reported more severe distress and greater urges to acquire the item of …

The Feedback-Related Negativity Is A Time-Dependent Brain Mechanism That Facilitates Aversive Learning: Implications For The Reinforcement Learning Frn Hypothesis, Eric Rawls

Graduate Theses and Dissertations

Organisms encode rewarding and aversive experiences through reinforcement learning, capitalizing on prediction errors (PEs), which adapt action strategies over time. Computational theories are explicit that PE signals should update action weights continuously over the course of a behavioral task, an important time-dependent variation that is eschewed in traditional neuroscience studies that average over large numbers of trials. I examined variation in reaction times and feedback-locked cortical activity over time as a function of PE to critically examine theories indicating that PE signals drive time-dependent learning. We recorded EEG while participants completed a novel reinforcement task that varied prediction error on …