Open Access. Powered by Scholars. Published by Universities.®

Medicine and Health Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

Psychology

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 4321 - 4350 of 8298

Full-Text Articles in Medicine and Health Sciences

Dnmt3a In The Hippocampal Ca1 Is Crucial In The Acquisition Of Morphine Self‐Administration In Rats, Jian-Jun Zhang, Feng-Ze Jiang, Wei Zheng, Ying Duan, Su-Bo Jin, Fang Shen, Jing Liang, Ming Li, Nan Sui Jan 2019

Dnmt3a In The Hippocampal Ca1 Is Crucial In The Acquisition Of Morphine Self‐Administration In Rats, Jian-Jun Zhang, Feng-Ze Jiang, Wei Zheng, Ying Duan, Su-Bo Jin, Fang Shen, Jing Liang, Ming Li, Nan Sui

Department of Psychology: Faculty Publications

Drug‐reinforced excessive operant responding is one fundamental feature of long-lasting addiction‐like behaviors and relapse in animals. However, the transcriptional regulatory mechanisms responsible for the persistent drug‐specific (not natural rewards) operant behavior are not entirely clear. In this study, we demonstrate a key role for one of the de novo DNA methyltransferase, DNMT3a, in the acquisition of morphine self‐administration (SA) in rats. The expression of DNMT3a in the hippocampal CA1 region but not in the nucleus accumbens shell was significantly up‐regulated after 1‐ and 7‐day morphine SA (0.3 mg/kg/infusion) but not after the yoked morphine injection. On the other hand, saccharin …


Meanings Of Preconception Health To Overweight Women In An Economically Depressed County, Valeria Ninette Balogh Jan 2019

Meanings Of Preconception Health To Overweight Women In An Economically Depressed County, Valeria Ninette Balogh

Walden Dissertations and Doctoral Studies

The intention-behavior gap between receiving professional health information and transitioning to improved health behaviors prior to conception is not well understood. In order to improve preconception health across the board, a more integrative understanding of the problem must present itself. This study combined elements from the theory of planned behavior, self-determination theory, and the bioecological model of human development as it's foundation. Qualitative phenomenology and semistructured face-to-face interviews were used to gain a deeper understanding of the ways in which nine overweight and obese women described preconception intentions and beliefs and the bioecological experiences leading to those beliefs. Interpretation of …


Millennial Retail Employees Experiences And Perceptions Of Leaders With Body Image Modifications, Jennifer Mcclure Jan 2019

Millennial Retail Employees Experiences And Perceptions Of Leaders With Body Image Modifications, Jennifer Mcclure

Walden Dissertations and Doctoral Studies

Millennials in retail account for a large portion of the U.S. workforce and have the highest number of body image modifications from tattoos, piercings, and/or gauges. Following Moustakas concept of perception, the purpose of this transcendental phenomenology study was to explore how Millennial-aged retail employees describe and experience leaders with body image modifications from tattoos, piercings, and/or gauges. Participants were sought from various retail locations and were required to be born between 1981 and 1996. Data were collected through interviews with 6 participants and the data were analyzed using Moustakas modification of the Van Kamm Method. The results showed that …


Depression Screening For Bariatric Surgical Patients, Cova Teresa Stidham Jan 2019

Depression Screening For Bariatric Surgical Patients, Cova Teresa Stidham

Walden Dissertations and Doctoral Studies

Obesity in the United States has increased to epidemic numbers over the last decade. Practitioners need to reverse the trend. To address the problem of depression in obesity, a practice guideline from a bariatric clinic for under-served populations was proposed to an expert panel. The Spell Out on First Use (PHQ-9) screening is a valid and reliable self-screening tool to assist the practitioner in determining the level of depression if any. The PHQ-9 has nine questions. No formal screening existed at the bariatric clinic, and the practice guideline (with algorithm and revised workflow) was proposed for use at the clinic. …


The Impact Of Parental Support On The Health Behaviors Of Transgender Young Adults, Jill Hingston Jan 2019

The Impact Of Parental Support On The Health Behaviors Of Transgender Young Adults, Jill Hingston

Walden Dissertations and Doctoral Studies

Paralleling recent increased public awareness of transgender issues, gender nonconforming youth are coming out at increasingly earlier ages. It is important to understand the impact that family acceptance or family rejection has on the health outcomes of transgender young people, who are at increased risk of discrimination, prejudice, harassment, victimization, violence, and possible mental health issues and who are understudied. This understanding can be framed within the minority stress model and Carl Rogers' theory of self, which provide insight into how minority groups experience negative reactions from both society and an internalized sense of congruence. The purpose of this descriptive, …


Human Performance In Manufacturing Tasks: Optimization And Assessment Of Required Workload And Capabilities, Maria Chiara Leva, Lorenzo Comberti, Micaela Demichela, Alberto Caimo Jan 2019

Human Performance In Manufacturing Tasks: Optimization And Assessment Of Required Workload And Capabilities, Maria Chiara Leva, Lorenzo Comberti, Micaela Demichela, Alberto Caimo

Conference papers

This paper discusses some examples where human performance and or human error prediction was achieved by using a modified version of the Rasch model(1980), where the probability of a specified outcome is modelled as a logistic function of the difference between the person capacity and item difficulty. The model needs to be modified to take into account an outcome that may not be dichotomous and o take into account the interaction between two macro factors: (a) Task complexity: that summarises all factors contributing to physical and mental workload requirements for execution of a given operative task & (b) Human capability: …


Relations Among Maternal And Paternal Behavior And Children's Stress Biology, S.K. Jiaming Lin, Stacey N. Doan, John Milton Jan 2019

Relations Among Maternal And Paternal Behavior And Children's Stress Biology, S.K. Jiaming Lin, Stacey N. Doan, John Milton

Scripps Senior Theses

Parenting behavior has been shown to have a wide range of effects, influencing children’s psychological and biological stress outcomes. Most research focuses on maternal parenting behaviors, with few studies observing the effects of paternal behaviors or the influence of both parents on their children. In this study, the relationship between maternal and paternal parenting behaviors was examined in its association to predict children’s cortisol levels. Cultural differences in parenting styles was also observed. American (N=86) and Chinese (N=97) families participated in the study, with parents reporting their behaviors. Children’s cortisol was collected during a stressor task and correlational analysis was …


Effects Of Multisensory Stop Signals On Sensitivity To Alcohol-Induced Disinhibition In Drinkers With Adhd, Alexandra R. D'Agostino Jan 2019

Effects Of Multisensory Stop Signals On Sensitivity To Alcohol-Induced Disinhibition In Drinkers With Adhd, Alexandra R. D'Agostino

Theses and Dissertations--Psychology

Multisensory environments facilitate behavioral functioning in humans. The redundant signal effect (RSE) refers to the observation that individuals respond more quickly to stimuli when information is presented as multisensory, redundant stimuli rather than as a single stimulus presented to either modality alone. Our studies show that the disinhibiting effects of alcohol are attenuated when stop signals are multisensory versus unisensory. The present study expanded on this research to test the degree to which multisensory stop signals could also attenuate the disinhibiting effects of alcohol in those with attention-deficit hyperactivity disorder (ADHD), a clinical population characterized by poor impulse control. The …


Parent Perceptions Of Biofeedback Treatment Effectiveness For Pediatric Migraine, Andrea Grando Weber Jan 2019

Parent Perceptions Of Biofeedback Treatment Effectiveness For Pediatric Migraine, Andrea Grando Weber

Walden Dissertations and Doctoral Studies

Gate control theory posits the idea that the brain and spinal cord have the ability to control the perception of pain sensation throughout the body. Biofeedback provides a proven way to teach a person how they may control their heart rate, breathing, and skin temperature. Through this process, individuals learn to lessen their migraine frequency and intensity. There are no studies to date that have measured the effectiveness of biofeedback in conjunction with medication for migraines in children despite established evidence of success in adults. In this study, an online format via SurveyMonkey was used to document the perceptions of …


Lived Experiences Of Caregivers For Individuals With Serious Mental Illness In Rural Communities, Jennifer Way Jan 2019

Lived Experiences Of Caregivers For Individuals With Serious Mental Illness In Rural Communities, Jennifer Way

Walden Dissertations and Doctoral Studies

More than ten million American adults live with a serious mental illness (SMI). Given the deinstitutionalization of psychiatric facilities, caregivers and family members are often needed to care for these individuals. Due to SMI individuals’ extensive needs, caregivers frequently face unique challenges and experiences. Although research has been conducted on caring for individuals with SMI, less information exists about the experiences of rural caregivers of SMI individuals. The purpose of this study was to fill this gap in research by exploring the lived experiences of caregivers of SMI individuals in rural areas with the intention of understanding this population’s unique …


Relative Wealth, Subjective Social Status, And Their Associations With Depression: Cross-Sectional, Population-Based Study In Rural Uganda, Meghan L. Smith, Bernard Kakuhikire, C. Baguma, Justin D. Rasmussen, David Bangsberg, Multiple Additional Authors Jan 2019

Relative Wealth, Subjective Social Status, And Their Associations With Depression: Cross-Sectional, Population-Based Study In Rural Uganda, Meghan L. Smith, Bernard Kakuhikire, C. Baguma, Justin D. Rasmussen, David Bangsberg, Multiple Additional Authors

OHSU-PSU School of Public Health Faculty Publications and Presentations

Depression is a leading cause of disability worldwide, and has been found to be a consistent correlate of socioeconomic status (SES). The relative deprivation hypothesis proposes that one mechanism linking SES to health involves social comparisons, suggesting that relative SES rather than absolute SES is of primary importance in determining health status. Using data from a whole-population sample of 1,620 participants residing in rural southwestern Uganda, we estimated the independent associations between objective and subjective relative wealth and probable depression, as measured by the depression subscale of the Hopkins Symptom Checklist (HSCLD). Objective relative wealth was measured by an asset …


Associations Between Ethnic-Racial Identity, Family Factors And Alcohol Problems Among Diverse Emerging Adults, Chloe Walker Jan 2019

Associations Between Ethnic-Racial Identity, Family Factors And Alcohol Problems Among Diverse Emerging Adults, Chloe Walker

Theses and Dissertations

The current study examined how multiple dimensions of ethnic-racial identity (ERI) were associated with alcohol use and alcohol use disorder (AUD) symptoms and how these relations varied by individuals’ ethnic-racial group among 1850 diverse emerging adults (M = 18.46, SD = .38). Further, measurement invariance of the Ethnic Identity Scale-Brief (EIS-B) was tested across Latinx, White, Black, Asian, and Multiracial students. Additionally, alternative models were examined that tested whether family factors (i.e., parent education and family history of alcohol problems) moderated the relations between ERI and alcohol problems to further examine nuances in these relations. Results indicated that the …


Modified Eye Movement Desensitization Therapy Protocol Treating Substance Abuse Disorders, Elise Von Tersch Jan 2019

Modified Eye Movement Desensitization Therapy Protocol Treating Substance Abuse Disorders, Elise Von Tersch

Walden Dissertations and Doctoral Studies

Quality substance abuse treatment is needed to help fight the battle against drug addiction. This qualitative study was designed to explore some of the approaches to eye movement desensitization (EMDR) therapy that therapists trained in Parnell's adapted EMDR model use in conjunction with treatment for addictions. The purpose of this narrative inquiry was to investigate the experience of therapists who incorporate substance abuse treatment with Parnell's adapted EMDR model when treating trauma and substance use disorders. The population studied comprised licensed mental health therapists who had completed Parnell's EMDR training and implemented Parnell's modified EMDR protocol in their professional practice. …


Inquiry Into The Correlation Between Burnout And Depression, Irvin Sam Schonfeld, Jay Verkuilen, Renzo Bianchi Jan 2019

Inquiry Into The Correlation Between Burnout And Depression, Irvin Sam Schonfeld, Jay Verkuilen, Renzo Bianchi

Publications and Research

The extent to which burnout refers to anything other than a depressive condition remains an object of controversy among occupational health specialists. In three studies conducted in two different countries and two different languages, we investigated the discriminant validity of burnout scales by evaluating the magnitude of the correlation between (latent) burnout and (latent) depression. In Study 1 (N = 911), burnout was assessed with the Maslach Burnout Inventory–General Survey’s Exhaustion subscale and depression with the depression module of the Patient Health Questionnaire (PHQ). In Study 2 (N = 1,386), the Shirom–Melamed Burnout Measure was used to assess burnout and …


Locus Of Control And Health Promotion For Marginalized Populations, Cara Stephenson-Hunter, Kathryn L. Dardeck Jan 2019

Locus Of Control And Health Promotion For Marginalized Populations, Cara Stephenson-Hunter, Kathryn L. Dardeck

Journal of Social, Behavioral, and Health Sciences

Socioeconomic health disparities in the United States have remained largely unchanged for decades. This remains the case even for preventable illness and disease. Current health behavior theories and interventions rely on the perception of control over one’s fate to achieve desired behavior. In low-income and other marginalized populations, however, hopelessness and the perception of having limited control may make interventions less effective. The purpose of this quantitative study was to examine the role of the locus of control (LOC) as defined by the degree to which one believes outcomes are determined by external forces such as chance or authority figures …


Nurse-Led Positive Psychology Intervention Is Feasible In Patients With Heart Failure, Erin Taylor Jan 2019

Nurse-Led Positive Psychology Intervention Is Feasible In Patients With Heart Failure, Erin Taylor

DNP Projects

Introduction:  Prevalence of heart failure (HF) in the US is projected to rise 46% by 2030, resulting in more than 8 million people with HF.  Negative psychologic states including depression and pessimism (negative future expectations) have been linked with poor cardiovascular outcomes, including HF.  Despite the fact that optimism (positive future expectations) and other positive affective states have been associated with superior outcomes, there has been little focus on interventions designed to increase positive psychological states in patients with HF.

Objective: To test the acceptability and feasibility of a nurse-led positive psychology intervention, Best Possible Self (BPS).

Methods: A convenience …


Screen Time And The Effects On Attention Deficit Hyperactivity Disorder, Cassandra Starks Jan 2019

Screen Time And The Effects On Attention Deficit Hyperactivity Disorder, Cassandra Starks

DNP Projects

PURPOSE: The purpose of this project is to determine if an educational intervention with families decreased overall screen time use in school-aged children with attention-deficit/hyperactivity disorder (ADHD).

METHODS: This study was a single group pre-test, post-test interventional study design. The sample population consisted of the parents/guardians of 30 school-aged children diagnosed with ADHD (5-12 years) recruited from the University of Kentucky Developmental and Behavioral Pediatrics Clinic between November 2019 and February 2020. Parents completed a survey about their child’s daily screen time exposure (tablets/cell phones, laptops/computers, video games, and television) and were educated how screen time can exacerbate ADHD symptoms, …


Burnout: Moving Beyond The Status Quo, Renzo Bianchi, Irvin Sam Schonfeld, Éric Laurent Jan 2019

Burnout: Moving Beyond The Status Quo, Renzo Bianchi, Irvin Sam Schonfeld, Éric Laurent

Publications and Research

Burnout has been defined as a job-induced syndrome combining emotional exhaustion, depersonalization/cynicism, and a sense of reduced personal accomplishment. In this article, we expand on past analyses of burnout by reviewing key, yet overlooked, problems affecting the construct. We concomitantly examine the implications of these problems for the overall validity of burnout research. Our work shows that burnout research is undermined by 4 main problems. First, what constitutes a case of burnout is unclear. Second, the basic conceptualization and operationalization of burnout are ill aligned. Third, burnout is unlikely to be the specifically job-induced syndrome it has been posited to …


Volume 11, Jacob Carney, Ryan White, Joseph Hyman, Jenny Raven, Megan Garrett, Ibrahim Kante, Summer Meinhard, Lauren Johnson, William "Editha" Dean Howells, Laura Gottschalk, Christopher Siefke, Pink Powell, Natasha Woodmancy, Katharine Colley, Abbey Mays, Charlotte Potts Jan 2019

Volume 11, Jacob Carney, Ryan White, Joseph Hyman, Jenny Raven, Megan Garrett, Ibrahim Kante, Summer Meinhard, Lauren Johnson, William "Editha" Dean Howells, Laura Gottschalk, Christopher Siefke, Pink Powell, Natasha Woodmancy, Katharine Colley, Abbey Mays, Charlotte Potts

Incite: The Journal of Undergraduate Scholarship

Table of Contents:

Introduction, Dr. Roger A. Byrne, Dean

From the Editor, Dr. Larissa "Kat" Tracy

From the Designers, Rachel English, Rachel Hanson

Synthesis of 3,5-substituted Parabens and their Antimicrobial Properties, Jacob Coarney, Ryan White

Chernobyl: Putting "Perestroika" and "Glasnot" to the Test, Joseph Hyman

Art by Jenny Raven

Watering Down Accessibility: The Issue with Public Access to Alaska's Federal Waterways, Meagan Garrett

Why Has the Democratic Republic of the Congo outsourced its Responsibility to Educate its Citizens? Ibrahim Kante

Art by Summer Meinhard

A Computational Study of Single Molecule Diodes, Lauren Johnson

Satire of …


Pokemon Go And Mental Health, Nathaniel Ed Jan 2019

Pokemon Go And Mental Health, Nathaniel Ed

Masters Theses

Pokémon GO is a new type of game that emphasizes physical activity and social interaction. In the literature, both physical activity and social interactions have been shown to be positively correlated with mental health. Much research has been conducted on the effects of gaming on mental health, but to date no research has been done on the possible correlations of the game Pokémon GO and mental health. The present study was conducted to determine whether Pokémon GO players scored significantly lower than a control group of traditional garners on scales of depression, anxiety, and pathological gaming, and if they reported …


Construct Validity Of The Teate Depression Inventory (Tdi) With A Middle Eastern/Arab American Sample, Dalia Bunni Jan 2019

Construct Validity Of The Teate Depression Inventory (Tdi) With A Middle Eastern/Arab American Sample, Dalia Bunni

Masters Theses

The purpose of the study was to examine the construct validity of a newer test used to measure depressive symptoms, the Teate Depression Inventory (TDI). The primary focus of the study was on Middle Eastern/Arab Americans (ME/AA). Previous research has demonstrated that ethnic minority groups may experience and present internalizing disorders, such as depression and anxiety differently than the majority ethnic group, White/Caucasian (W/C) individuals. Further, research suggests that there is a disparity in mental health care among ethnic minority groups, starting with detecting and diagnosing mental health disorders. Inaccurate detection and diagnoses informs inaccurate treatment, further creating a disparity. …


Outpatients' And Treatment Providers’ Cultural Model(S) Of Mental Illness In Northern Illinois, Emily Jean Stephen Jan 2019

Outpatients' And Treatment Providers’ Cultural Model(S) Of Mental Illness In Northern Illinois, Emily Jean Stephen

Graduate Research Theses & Dissertations

For this thesis, I interviewed outpatients and clinicians from mental health treatment providers from the DeKalb, Illinois area to investigate the cultural models of mental illness held by both groups. I employed ethnographic methods of semi-structured interviews, and with cognitive tasks (free-listing, and pile sorting) to research similarities and differences between the outpatients’ and mental health treatment providers’ cultural models of ‘mental illness.’ Both mental health clinicians and outpatients have experience with disorders commonly termed ‘mental illness.’ I found differences of experience and identity seemed to more strongly influence one’s cultural model of mental illness than one’s level or type …


Efficacy Of A Va Residential Treatment Program For Co-Occurring Disorders, Kathrin Hohenstern Jan 2019

Efficacy Of A Va Residential Treatment Program For Co-Occurring Disorders, Kathrin Hohenstern

Walden Dissertations and Doctoral Studies

The problem of co-occurring substance abuse and mental health disorders among the veteran population can impact numerous aspects of a veteran's life, including self-esteem, relationships, employment, and legal issues. The Mental Health Residential Rehabilitation Treatment Program (MH RRTP) at the Saint Cloud, Minnesota VA Healthcare System is a program that provides residential treatment for this population. Identifying practical and beneficial treatment methods promotes better coping mechanisms for veterans and impacts social change by providing timely and cost-efficient care for veterans, while also leading the way for overall changes and improvements in other VA residential treatment programs. This study identified how …


Effectiveness Of Yoga Therapy On Pain And Related Depression, Anxiety, Perceived Stress, And Quality Of Life, Karen Romani Jan 2019

Effectiveness Of Yoga Therapy On Pain And Related Depression, Anxiety, Perceived Stress, And Quality Of Life, Karen Romani

Walden Dissertations and Doctoral Studies

Individuals are becoming more dependent on medication for conditions such as chronic-pain, anxiety, and depression. It is reported that patients are often overprescribed medication while health outcomes do not improve. The medicalization of society is distracting attention from the possibility of other therapies such as complementary or alternative medicine (CAMs) that can improve health outcomes if they were as supported as pharmacological research and better received by the medical community. Yoga and meditation, the components of Mindfulness Based Stress Reduction (MBSR) and yoga therapy, have been shown as effective CAMs for cases of anxiety and depression related to chronic illness …


Effects Of A Group-Deposit Prize Draw On The Step Counts Of Adults, Alex J. Mccurdy Jan 2019

Effects Of A Group-Deposit Prize Draw On The Step Counts Of Adults, Alex J. Mccurdy

University of the Pacific Theses and Dissertations

The World Health Organization (WHO, 2016) reports that 3.2 million deaths per year are attributable to physical inactivity, making it the fourth leading risk factor for global mortality. Physical inactivity is also a key risk factor for noncommunicable diseases such as cardiovascular disease, cancer, and diabetes (WHO, 2018). Globally, 1 in 4 adults is not active enough and, therefore, foregoes a myriad of health benefits associated with Physical Activity (PA; WHO, 2018). In the United States, only about 1 in 5 (21%) adults meet the 2008 Physical Activity Guidelines set by the Centers for Disease Control and Prevention (CDC, 2018). …


Anti-Fat Bias Of Occupational Therapy Students, Carli Friedman, Laura H. Vanpuymbrouck Jan 2019

Anti-Fat Bias Of Occupational Therapy Students, Carli Friedman, Laura H. Vanpuymbrouck

Journal of Occupational Therapy Education

Anti-fat biases in healthcare providers can result in substandard and decreased care, and also result in health disparities. There are very few studies that examine occupational therapists’ attitudes towards fat people and implications on practice. Therefore, the aim of this study was to explore the implicit fat prejudice of occupational therapy students. The authors also sought to understand how this prejudice related to the occupation-based models/frames of reference with which students professionally identified. To do so, 58 occupational therapy students from three Midwestern universities, all of whom recently completed their first year of professional occupational therapy education, completed the Weight …


Risk Domains And Adolescent Depression, Nathan Kawczynski Jan 2019

Risk Domains And Adolescent Depression, Nathan Kawczynski

UNF Graduate Theses and Dissertations

Adolescence and young adulthood are the periods of development associated with the highest amount of risk-taking. One theory, the Dual-Systems model, suggests that this could be due to an imbalance in the maturation of two brain systems: reward appraisal, which matures first, and cognitive control, which matures later. This imbalance may be the cause of adolescents’ tendency to favor immediate rewards, disregarding consequences. Depressed adolescents, however, behave differently. While it is not exactly clear whether they take more risks or fewer risks, depressed adolescents display different interactions and decision making with their peers than non-depressed adolescents. This study attempted to …


An Investigation Of Therapeutic Rapport Through Prosody In Brief Psychodynamic Psychotherapy, Carolina De Pasquale, Charlie Cullen, Brian Vaughan Jan 2019

An Investigation Of Therapeutic Rapport Through Prosody In Brief Psychodynamic Psychotherapy, Carolina De Pasquale, Charlie Cullen, Brian Vaughan

Conference Papers

Therapeutic alliance, a concept closely related to rapport, is one of the most important variables in psychotherapy. High degrees of synchrony/coordination in the therapeutic session are considered to contribute to rapport, and have received attention in the psychotherapy literature. Coordinative behaviours are observable in speech, and they manifest in phenomena such as prosodic accommodation, a dynamic phenomenon closely related to conversational success. A preliminary investigation of interpersonal prosodic dynamics in psychotherapy was performed on a database obtained in collaboration with the University of Padua, consisting of 16 recordings making up the entire course of a brief psychodynamic psychotherapy intervention for …


Examining The Utility Of Behavioral Economic Demand In Addiction Science, Justin Charles Strickland Jan 2019

Examining The Utility Of Behavioral Economic Demand In Addiction Science, Justin Charles Strickland

Theses and Dissertations--Psychology

The marriage of perspectives from behavioral economic theory and learning theory has the potential to advance an understanding of substance use and substance use disorder. Behavioral economic demand is a central concept to this interdisciplinary approach. Evaluating demand in the laboratory and clinic can improve previous research on the relative reinforcing effects of drugs by accounting for the multi-dimensional nature of reinforcement rather than viewing reinforcement as a unitary construct. Recent advances in the commodity purchase task methodology have further simplified the measurement of demand values in human participants. This dissertation project presents a programmatic series of studies designed to …


When Brain Stimulation Backfires, Sarah Beth Bell Jan 2019

When Brain Stimulation Backfires, Sarah Beth Bell

Theses and Dissertations--Psychology

tDCS brain stimulation does not always work in the intended direction. It has been found to sometimes worsen behavior rather than improve it. A preliminary study shows that people high on sensation-seeking and lack of premeditation were prone to reverse effects of tDCS on performance on a Stop Signal Task. Both of these constructs are related to dopamine levels. Study 2 seeks to intentionally cause a reverse effect of tDCS by increasing participants’ dopamine levels via caffeine. There was not a significant interaction between tDCS and caffeine on errors on the Stop Signal Task in this study. However, other factors …