Social and Behavioral Sciences Commons^™

Effect Of Reverberation Context On Spatial Hearing Performance Of Normally Hearing Listeners, Renita E. Sudirga

Electronic Thesis and Dissertation Repository

Previous studies provide evidence that listening experience in a particular reverberant environment improves speech intelligibility and localization performance in that environment. Such studies, however, are few, and there is little knowledge of the underlying mechanisms. The experiments presented in this thesis explored the effect of reverberation context, in particular, the similarity in interaural coherence within a context, on listeners' performance in sound localization, speech perception in a spatially separated noise, spatial release from speech-on-speech masking, and target location identification in a multi-talker configuration.

All experiments were conducted in simulated reverberant environments created with a loudspeaker array in an anechoic chamber. …

The Effects Of Alcohol On Different Classes Of Motion Perception, Steven J. Matson

Electronic Thesis and Dissertation Repository

We used a psychophysical approach to investigate how alcohol affected visual sensitivity to perceive different classes of motion. Visual sensitivities were measured in both a non-alcohol and an alcohol condition for three classes of motion: Minimum Motion, Simple Motion, and Complex Motion. Perceptual thresholds, taken as the degree of motion at which an observer responded correctly with an accuracy of 75%, or Weber fractions were compared between the non-alcohol and the alcohol conditions. For Simple and Complex motion, similar comparisons were made as a function of speed (e.g., 2°s^-1, 6°s^-1, and 12°s^-1). Perceptual thresholds …

Psychotic Diagnosis And Artist Pathology: Schizophrenic Art’S Influence On The Identification Of The Disorder, Danielle Watson

Honors Projects

The use of artwork created by schizophrenic individuals is unique in its contextual elements, including bizarre imagery, strong border lines, and desexualized features. The uniqueness of schizophrenic art lends itself to the possibility of being identified as such, therefore, opening the possibility for it to be used as a diagnostic tool in the clinical setting. Presently, schizophrenic art is used in art therapy, but is not widely employed in diagnostic practices. The current study aimed to test the possible identification of schizophrenic art in contrast to normal art and no art. Three questionnaires were created and randomly distributed to participants. …

Dissociation And Sexual Trauma: The Moderating Role Of Somatization, Amineh Abbas

Doctoral Dissertations

This study examined various types of trauma, with an emphasis on sexual trauma across the lifespan, in a clinical sample of male and female adult outpatients assessed for trauma, somatization, and dissociation. Two hundred forty-five adult outpatients at the University of Tennessee Psychological Clinic were administered the Dissociative Experiences Scale (DES), the Traumatic Experiences Checklist (TEC), and Symptom Checklist-90-Revised (SCL-90-R), as part of the routine intake procedure. Of those individuals, 200 patients completed the questionnaires correctly and were included in the final study sample. The experience of sexual trauma indeed accounted for additional variance in somatization scores over and above …

The Effect Of Grapes In Mice With Alzheimer's Disease And Brain Injury, Nikita Mistry

Loma Linda University Electronic Theses, Dissertations & Projects

Alzheimer’s disease (AD) is a progressive neurodegenerative disorder resulting in cognitive and memory deficits and deposits of amyloid beta (Aβ) in the cortex and hippocampus are thought to be significant contributors to the disease process. Increasing evidence suggests that foods rich in polyphenols, such as pomegranates and grapes, may have neuroprotective effects in both rodents and humans. Our previous research has shown that a pomegranate-enriched diet decreased Aβ plaque load and improved behavior in Tg2576 mice. In this study, we determined whether a grape-enriched diet altered Aβ neuropathology and TBI in PSAPP mice. Mice received either craniotomy or a moderate …

The Impact Of Mindfulness And Test Anxiety On Academic Performance., Mariam A. Altairi

College of Arts & Sciences Senior Honors Theses

No abstract provided.

Cross Cultural Analysis For Training And Facilitating Latin-American Audiences, Jose P. Alcazar

Creativity and Change Leadership Graduate Student Master's Projects

The purpose of this project is to help Creative Problem Solving (CPS) trainers and facilitators to improve the efficacy when working with Hispanic groups and individuals, either in a personal or in organizational environments. This project will guide the facilitators to use a more appropriate tools that will allow the resource group to feel more comfortable during the idea generation, creating an environment more according to the believes and behavioral habits; and the client to feel more confident to converge and make decisions accordingly to the initial goals. When training people in CPS, the project will align the methodology and …

Change Detection In Rhesus Monkeys And Humans, Deepna T. Devkar, Deepna T. Devkar

Dissertations & Theses (Open Access)

Visual working memory (VWM) is the temporary retention of visual information and a key component of cognitive processing. The classical paradigm for studying VWM and its encoding limitations has been change detection. Early work focused on how many items could be stored in VWM, leading to the popular theory that humans could remember no more than 4±1 items. More recently, proposals have suggested that VWM is a noisy, continuous resource distributed across virtually all items in the visual field, resulting in diminished memory quality rather than limited quantity. This debate about the nature of VWM has predominantly been studied with …

The Phenomenon Of Abstract Cognition Among Scholastic Chess Participants: A Case Study, Brent C. Laws

Electronic Theses and Dissertations

A qualitative investigation was conducted to explore the phenomenon of abstract cognition among a purposive sample of 5 secondary scholastic chess club participants. The case study enabled the researcher to explore the faculties of abstract cognition among students of contrasting skills and abilities in playing chess. The study also allowed for the consideration of potential visual-spatial, logical, academic, social competency and life benefits of chess play. Through analysis of interviews, chess simulations, blindfold chess play, and narration of chess lines and sequences, the investigator was able to extract meaning and code schemata into a holistic understanding of the phenomenon of …

Utilizing Visual Attention And Inclination To Facilitate Brain-Computer Interface Design In An Amyotrophic Lateral Sclerosis Sample, David B. Ryan

Electronic Theses and Dissertations

Individuals who suffer from amyotrophic lateral sclerosis (ALS) have a loss of motor control and possibly the loss of speech. A brain-computer interface (BCI) provides a means for communication through nonmuscular control. Visual BCIs have shown the highest potential when compared to other modalities; nonetheless, visual attention concepts are largely ignored during the development of BCI paradigms. Additionally, individual performance differences and personal preference are not considered in paradigm development. The traditional method to discover the best paradigm for the individual user is trial and error. Visual attention research and personal preference provide the building blocks and guidelines to develop …

Does Video Game Use Exacerbate The Relation Between Neurophysiological Deficits And Adhd Symptoms In Children And Adolescents?, James Kenneth Goodlad Iii

Dissertations

Attention-deficit/hyperactivity disorder (ADHD) is diagnosed based on behavioral symptoms but is thought to have a significant heritable neurological basis, and several brain structures have been implicated. Recent research has focused on the role of environmental factors that may influence the behavioral expression of inattention and hyperactivity-impulsivity in children and teens, particularly when a biological predisposition exists. This study sought to broaden the literature base by examining the extent to which one environmental factor—video game use—moderated the relation between neuropsychological deficits in attention and inhibition and the behavioral symptoms of ADHD. It was hypothesized that gaming frequency and duration as well …

Factor Structure Of The Cpt-Ii, Mary Vertinski

UNLV Theses, Dissertations, Professional Papers, and Capstones

The current study investigates the factor structure of the Conners' Continuous Performance Test-II (CPT-II) in four pediatric samples of participants: (a) patients with traumatic brain injury, (b) healthy controls, (c) patients with various clinical diagnoses, and (d) all of the previously mentioned subjects combined. Confirmatory factor analyses (CFA) were used to investigate a one-, three- and four-factor model fit of the data. None of the models examined were an adequate fit for the data; however, it appears that the four-factor model seemed to be the best fitting of the models examined. Failure to find reasonably adequate fit precluded further analyses.

Attention Modulates Erp Indices Of The Precedence Effect, Benjamin H. Zobel

Masters Theses

When presented with two identical sounds from different locations separated by a short onset asynchrony, listeners report hearing a single source at the location of the lead sound, a phenomenon called the precedence effect (Wallach et al., 1949; Haas, 1951). When the onset asynchrony is above echo threshold, listeners report hearing the lead and lag sounds as separate sources with distinct locations. Event-related potential (ERP) studies have shown that perception of separate sound sources is accompanied by an object-related negativity (ORN) 100-250 ms after onset and a late posterior positivity (LP) 300-500 ms after onset (Sanders et al., 2008; Sanders …

Why We Disagree: Morality And Social Categorization, Nathan Christopher Carnes

Masters Theses

Recent research has identified important functional differences between Prescriptive morality (based in approach motivation) and Proscriptive morality (based in avoidance motivation). The purpose of the present research was to understand the consequences of these moralities applied at the group level for social categorization, especially in response to threat. I measured social categorization with a novel method in which participants categorized same-race and cross-race morphed faces. Social Justice (which is Prescriptive morality applied to the group) was associated with more inclusive social categorization under conditions of threat compared to a control condition. Social Order (which is Proscriptive morality applied to the …

The Use Of Hemifield Eye-Patching For Modifying The Perceptual-Attentional Bias In Healthy Individuals, Randall L. Miller

Seton Hall University Dissertations and Theses (ETDs)

Healthy individuals do not perceive the left and right sides of space equally, showing a leftward spatial bias on visuospatial tasks. This bias may be more attributed to a perceptual-attentional (PA) component than a motor-intentional (MI) component. While monocular eye patching alters this spatial bias via modification of PA but not MI, hemifield eye patches that occluded the left or right half of the visual field have been shown to be more effective at modifying spatial bias, but only in patients with spatial neglect. Furthermore, it is unclear whether hemifield patching affects PA, MI, or both. The goal of the …

The Effects Of Semantic Neighborhood Density On The Processing Of Ambiguous Words, Mark J. Mcphedran

Electronic Thesis and Dissertation Repository

Semantic neighborhood density’s effects on the processing of ambiguous words were examined in three lexical decision experiments. Semantic neighborhoods were defined in terms of semantic set size and connectivity in Experiment 1, and in terms of semantic set size in Experiments 2 and 3. In Experiment 1, set size, connectivity, and ambiguity were crossed. An ambiguity disadvantage was observed for large set, high connectivity words, and there was some suggestion of an ambiguity advantage for small set, high connectivity words. Experiments 2 and 3 held connectivity constant at a high level, and set size and ambiguity were crossed, with Experiment …

Prism Adaptation Effects On The Attentional Window, Michelle C. Rosenthal

Seton Hall University Dissertations and Theses (ETDs)

Prism adaptation, a visuomotor adaptation procedure that employs a lateral shift of the visual field, has been widely shown to affect lateral biases in the distribution of spatial attention in healthy individuals. The effects of prism adaptation on the size of the attentional window, the limited area of the visual field we attend to and extract information from without moving our eyes, are not fully elucidated. In this study, I investigated the effects of prism adaptation on the size of the attentional window in healthy young adults. This was accomplished via a useful field of view task, which measures the …

Neural Correlates Of Face Processing: Perceptual Narrowing And Categorization, Katherine Claire Dixon

Masters Theses

Perceptual narrowing is a developmental process that occurs between 6 and 9 months of age, during which infants transition from having more general perceptual abilities to more specific abilities. An example of this would be the other-species effect, in which infants experience a decline in the ability to individuate other species’ faces. It has been suggested that an infant’s growing ability to categorize could lead to a decline in their ability to discern individuals within other-species groups (Scott & Monesson, 2009), and that this difference is related to processing styles. In this study, 9-month-old infants were tested on their subordinate-level …

Human Centered Design Applied To Perceptual Paradigms, Jonathan T. Fancher

All NMU Master's Theses

This thesis gives three examples of projects that apply knowledge from areas such as human centered design, computer science, and psychology to study sensation and perception. All three of these projects were created to gather information on how humans interact with their surrounding environment and the world. For instance the first area of discovery included the way humans interact within their perceptual and personal space through an interactive table. The second project looks at exploring the neural mechanisms that affect Haptic Hallucinations by creating a device that can give the feeling of bugs crawling on or below the surface of …

Visual Cues Effects On Temperature Perception, Carrie Anne Balcer

All NMU Master's Theses

The purpose of this study was to measure reaction times (RTs) when a conflict arises between the visual feedback and the temperature of an object. This study focused on the quantifiable RTs along with the qualitative feedback of the participants. It was hypothesized that when the information of the visual and temperature stimuli are incongruent (blue-warm or red-cold), the RTs will be slower than when they are congruent (blue-cold or red-warm). We suggest that vision could convey temperature perception in an independent but complimentary manner. We utilized the Oculus Rift to create a virtual environment that allowed us to control …

How Attention And Beat Perception Modulate Neural Entrainment To Rhythm, Aaron Wc Gibbings

Electronic Thesis and Dissertation Repository

Recently, steady-state evoked potentials (SS-EPs) at the frequency of the beat have been observed in electroencephalograms (EEG; Nozaradan et al., 2011, 2012). Previous studies involved participants actively attending to isochronous sequences and repeating rhythms. Here we assessed whether neural enhancement of SS-EPs at beat-related frequencies occurred when (1) participants did not attend to the rhythms, and (2) the rhythm was novel and did not repeat.

When participants listened to rhythms that contained a beat SS-EP enhancement was larger during attended rhythms than when participants were distracted by another task, although SS-EPs were still present in all conditions. SS-EP enhancement therefore …

The Motivation To Comply With Internal Or External Moral Expectations: Is Just One Motivation Enough?, Huey Woon Lee

Dissertations and Theses Collection (Open Access)

Although researchers have shown how the need to reduce internal discrepancies between one’s current level of morality and one’s moral standard and the need to reduce negative social judgment drive pro-social behaviors, it remains unclear if the presence of both these motivations has additive effects on pro-social behaviors. I propose that the answer is no: people operate on a sufficient motivation principle when deciding to behave prosocially, that is, they should be equally prosocial whether one or both motivations are present. I further argue that individual differences in public (PUSC) and private (PRSC) self-consciousness affect people’s attention to the two …

Seeing With Sound: Investigating The Behavioural Applications And Neural Correlates Of Human Echolocation, Jennifer L. Milne

Electronic Thesis and Dissertation Repository

Some blind humans use the reflected echoes from self-produced signals to perceive their silent surroundings. Although the use of echolocation is well documented in animals such as bats and dolphins, comparatively little is known about human echolocation. The overarching goal of the work presented in this thesis was to shed light on some of the basic functions of human echolocation, including the perception of the shape, size, and material. I addressed these aspects of echolocation using behavioural psychophysics and neuroimaging.

In Chapter 2 I show that blind echolocators were able to accurately identify the shape of 2D objects, but that …

The Relationship Between Implicit And Explicit Processing In Statistical Language Learning, Nicolette B. Noonan

Electronic Thesis and Dissertation Repository

Statistical language learning is an implicit process wherein language learners track sequential statistics in fluent speech, and may it facilitate the learning of word boundaries. This process is well studied, however, the cognitive mechanisms supporting it remain poorly understood. The present thesis investigated whether domain-specific or cross-domain explicit working memory engagement would impair implicit statistical learning of word boundaries in fluent speech. Participants (n = 110) were exposed to an implicit statistical word segmentation paradigm while concurrently engaged in no other task (control), or an explicit domain- specific (verbal) or cross-domain (visuospatial) working memory task of either low- or high- …

The Role Of The Phonological Syllable In English Word Recognition, Daniel Trinh

Electronic Thesis and Dissertation Repository

Three ERP experiments examined the role of syllables during English visual word recognition. A colour congruency paradigm (Carreiras, Vergara, & Barber, 2005) was used in which disyllabic words were presented in two colours that divided each item either at the syllable boundary (congruent condition), or one letter away from the syllable boundary (incongruent condition). Experiment 1 investigated syllable congruency effects for words that either were presented with an orthotactically illegal segment in the incongruent condition (e.g., whi-mper, comr-ade), or were presented with orthotactically legal segments in the incongruent condition (e.g., whi-sper, cont-act). A syllable congruency effect was observed in the …

Child Life Specialists’ Facilitation Of Family-Centered Care: The Importance Of Sibling Support, Carissa L. Lane

Psychology and Child Development

Certified Child Life Specialists’ understanding of family-centered care, and their beliefs and practices involving siblings of chronically/critically ill children were examined using an online survey. Participants were Certified Child Life Specialists recruited form the Child Life Council Forum. Relationships between utilization of certain words and support programs offered to siblings, were examined. Findings revealed a relationship in one area of coded language and support program for siblings, but not the other. Findings also revealed that all CCLS believe in the inclusion of siblings during the treatment process, however they are offered less support services than parents. Diverse results regarding multiple …

Incarceration And Reintegration: How It Impacts Mental Health, April M. Marier, Alex Alfredo Reyes

Electronic Theses, Projects, and Dissertations

ABSTRACT

Background: Previous criminal justice policies have been non-effective leading to overpopulated prisons and unsuccessful reintegration. There is a lack of effective supportive and/or rehabilitative services resulting in high rates of recidivism and mental health implications. Objective: This study investigated the perceived impact that incarceration and reintegration with little to no supportive and/or rehabilitative services has on the mental health status of an individual. The emphasis was on participant perception and not on professional reports because of underreporting and lack of attention to mental health in the criminal justice system. Methods: Focus groups in the Inland Empire and Coachella Valley …

An Evaluation Of Various Safmeds Procedures, Shawn Patrick Quigley

Dissertations

Lindsley developed Say-All-Fast-Minute-Every-Day-Shuffled, or SAFMEDS, in the late 1970’s to enhance the typical use of flashcards (Graf & Auman, 2005). The acronym was developed specifically to guide the learner’s behavior when using flashcards. A review of SAFMEDS research indicates it has been utilized with children, college students and older adults with and without disabilities. The literature also indicates the SAFMEDS procedures used are not well documented or have multiple variations limiting practitioners’ ability to know what procedure to use and when. Furthermore, future SAFMEDS research is hampered by variations in the independent variable (i.e., SAFMEDS). The purpose of this study …

Improv To Improve Interprofessional Communication, Team Building, Patient Safety, And Patient Satisfaction, Candace A. Campbell

Doctor of Nursing Practice (DNP) Projects

The purpose of this process improvement project was to implement a test of change within a healthcare team utilizing applied improvisational exercises (AIEs), and to lay the groundwork for more effective inter- and intra-professional communication.

Literature review: AIEs have been shown to facilitate individual participant communication strengths through a process of un-learning certain common behavioral habits, and learning new habits that assist in creating and expanding closed-loop communication. Such un-learning and learning enriches the participant’s awareness of the environment and encourages participant adaptability through positive group interactions.

Method: An all-day AIE seminar/workshop was conducted with members of two healthcare teams …

The Formation Of Situation Models In Multimedia, Kris Gunawan

UNLV Theses, Dissertations, Professional Papers, and Capstones

When people read traditional text-based stories, they construct mental representations of the described state of affairs, called situation models, to connect various details of events (e.g., time, space, entity) in memory (Zwaan & Radvansky, 1998). According to the cognitive theory of multimedia learning (Mayer, 2005; 2011), stories presented as pictures and text generate independent channels of mental representations that can work hand-in-hand or separately to acquire and remember the materials presented. This dissertation consisted of two experiments that were used to further explore how the two modalities affect what is being mentally represented in memory. In Experiment 1, participants were …