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The Impacts Of Caregiving And Social Support On Stress For Multiple Sclerosis: A Study On Informal Caregivers, Jacqueline Mercado Dec 2023

The Impacts Of Caregiving And Social Support On Stress For Multiple Sclerosis: A Study On Informal Caregivers, Jacqueline Mercado

Theses and Dissertations

The purpose of the present quantitative study was to gain an increased understanding of the impacts of caregiving and social support on stress for unpaid informal caregivers of persons with Multiple Sclerosis. Caregiving for MS can be rewarding yet stressful. Informal caregivers are the primary source of ongoing home care for family members or friends with MS. Due to the complexity of care, caregivers are especially vulnerable to higher strain as they often feel unprepared for this role. This study examined perceived social support and demographic variables on caregivers' stress to gain insight into mediating caregiver psychosocial challenges. …


Effects Of Chronic Stress On Working Memory Are Sex-Specific And Age-Dependent, Tyler Jamison Cox Oct 2023

Effects Of Chronic Stress On Working Memory Are Sex-Specific And Age-Dependent, Tyler Jamison Cox

Theses and Dissertations

As the aging demographic of the United States expands, the convergence of age-related cognitive decline and stress-related dysregulation emerges as a substantial concern, impacting not only the lifespan but also the overall well-being of American citizens. In the realm of research, there has been a pronounced focus on Alzheimer's Disease, leading to an imbalanced allocation of resources compared to the study of normal aging. It is widely acknowledged that executive function deteriorates as individuals age, a concept substantiated by numerous investigations conducted in labs dedicated to the study of normal aging. Significantly, even among individuals afflicted with neurodegenerative disorders affecting …


An Interpretative Phenomenological Analysis Of The Lived Experience Of Parental Caregivers For Children With Severe Epidermolysis Bullosa, Michael J. Valentine May 2022

An Interpretative Phenomenological Analysis Of The Lived Experience Of Parental Caregivers For Children With Severe Epidermolysis Bullosa, Michael J. Valentine

Theses and Dissertations

Providing care to child with a chronic, rare diseases has been identified as a major life stressor with a myriad of negative physical and mental health consequences. These stresses have previously been found to create burden that may impair caregiving efforts and increase the risk of mortality for both the caregiver and affected child. Many rare diseases affect children. It is not known how caregiver burden and the source of stress varies by disease. Qualitative methods have been used to understand caregiver experience with the rare disease, epidermolysis bullosa (EB), but no such studies have occurred in the United States. …


Chronic Adolescent Stress As A Predictive Factor For The Risk Of Developing Ptsd-Like Symptoms In Adulthood, Grace K. Young Jan 2022

Chronic Adolescent Stress As A Predictive Factor For The Risk Of Developing Ptsd-Like Symptoms In Adulthood, Grace K. Young

Theses and Dissertations

Post-traumatic stress disorder is a stress and trauma based psychological disorder that is defined by the DSM-IV as an anxiety disorder that affects approximately 7.8% of people in the United States. PTSD is when those who suffer a traumatic event have intense and distressing feelings, emotions, and memories for a prolonged period of time after the event. A prominent feature of PTSD is the impaired ability to properly extinguish a fear response after a dangerous trigger or stressor is no longer present, also known as safety learning. Stressors are threats perceived within the environment that activate a response within the …


Impact Of The Covid-19 Pandemic On Child Anxiety Symptoms: The Influence Of The Caregiver-Child Relationship, Rebecca Hoppe Jan 2022

Impact Of The Covid-19 Pandemic On Child Anxiety Symptoms: The Influence Of The Caregiver-Child Relationship, Rebecca Hoppe

Theses and Dissertations

Research suggests that youth are dealing with a myriad of worries during the COVID-19 pandemic (Ellis et al., 2020), which highlights the need for investigations focused on child anxiety. However, to date little research has examined children’s anxiety in the COVID-19 pandemic nor the potential protective effects of the caregiver-child relationship. Therefore, this research aimed to contribute to the literature by investigating the influence of COVID-19 related stressors in younger children and leveraging children’s report of their own attachment security within their relationship with their caregiver and mental health. The current study used a national, quantitative survey of young children …


Systematic Review Regarding The Use Of Mindfulness-Based Mobile Applications To Reduce Psychological Symptoms And Enhance Well-Being Among General And Clinical Population Adults: Benefits, Limitations And Future Directions, Brian Clawson Jan 2022

Systematic Review Regarding The Use Of Mindfulness-Based Mobile Applications To Reduce Psychological Symptoms And Enhance Well-Being Among General And Clinical Population Adults: Benefits, Limitations And Future Directions, Brian Clawson

Theses and Dissertations

Mindfulness is now utilized throughout Western Society and is part of the growing behavioral health, self-help, and wellness movements. Mobile applications have become increasingly popular for a wide variety of uses related to physical health, mental health, and self-improvement. Therefore, mindfulness-based mobile applications have promise both as stand-alone tools for end-users seeking self-help resources and as clinician-recommended adjunctive tools to enhance the process and outcomes of professional therapy. This systematic review identified, reviewed, and synthesized the findings from studies (n = 29) concerning the impact of mindfulness-based mobile applications on specific aspects of psychological functioning in both the general population …


Effects Of Provider Support And Psychosocial Stressors On Maternal Health-Promoting Behaviors, Mary Catherine Jessen Dec 2021

Effects Of Provider Support And Psychosocial Stressors On Maternal Health-Promoting Behaviors, Mary Catherine Jessen

Theses and Dissertations

ABSTRACTEFFECTS OF PROVIDER SUPPORT AND PSYCHOSOCIAL STRESSORS ON MATERNAL HEALTH-PROMOTING BEHAVIORS

Despite technological and structural advances in the organization and delivery of health care services to pregnant women and infants, the U.S. ranks low on perinatal outcomes with profound disparities. Engagement in health-promoting behaviors during pregnancy is critical in improving birth outcomes. Women, particularly women of color, continue to experience unmet needs for emotional support with providers. Women of color experience being treated differently based on their race. The purpose of this study was to 1) examine the relationships between stress, provider support, and specific maternal health promoting behaviors (MHPB) …


Feasibility And Preliminary Outcomes Of A Brief Mindfulness-Based Intervention (Bmbi) To Decrease Stress And Improve Well-Being In Secondary School Teachers, Alex M. Roberts Jul 2020

Feasibility And Preliminary Outcomes Of A Brief Mindfulness-Based Intervention (Bmbi) To Decrease Stress And Improve Well-Being In Secondary School Teachers, Alex M. Roberts

Theses and Dissertations

Teachers often experience symptoms of stress and burnout due to the chronicity of their occupational demands. These symptoms can negatively impact teachers’ coping abilities and have implications for their physical and psychological health. Research indicates that mindfulness-based interventions (MBIs) have potential to help alleviate these symptoms of stress and burnout. Increasing numbers of MBIs for teachers have been implemented in the past five to ten years. However, few teacher-focused MBIs measure intervention feasibility and little data exist informing how to design and implement feasible MBIs in this context while simultaneously maximizing their potential positive effects. The current study examined the …


The Relationship Between Stress, Anxiety, Depression, Coping And Satisfaction With Care Among Family Of Adult Acute Care Trauma Patients, Ashalata Ann Pereira May 2020

The Relationship Between Stress, Anxiety, Depression, Coping And Satisfaction With Care Among Family Of Adult Acute Care Trauma Patients, Ashalata Ann Pereira

Theses and Dissertations

Background: Surprisingly few studies have considered the impact of trauma on adult family members of those admitted to the acute care, rather than ICU. Throughout the course of hospitalization, as patients move through different levels of care, family members must learn to adapt to, and cope with changes in care delivery. Purpose: To explore the literature to understand the state of the science, to assess the psychosocial and functional impact on family of adult trauma in acute care, and to identify predictors of coping and satisfaction with care provided to meet their needs. Design: The Lazarus & Folkman (1984) Stress, …


The Moderating Effects Of Parenting Factors And Perceived Stress On African American Adolescent Weight Related Outcomes, Colby Kipp Apr 2020

The Moderating Effects Of Parenting Factors And Perceived Stress On African American Adolescent Weight Related Outcomes, Colby Kipp

Theses and Dissertations

African American adolescents experience a higher prevalence of obesity than nonminorities with approximately 40% being overweight or obese. Chronic stress, both among parents and adolescents, may be important to consider when assessing the factors that influence adolescent weight status. Baseline data were collected from one hundred forty eight African American adolescents (Mage = 12.93, SD = 1.75; MBMI% = 96.7, SD = 3.90) and their caregivers (Mage = 44.5, SD = 8.6; MBMI = 37.63, SD = 8.21) enrolled in the Families Improving Together (FIT) for Weight Loss trial. Adolescents self-reported their perceptions of …


Examining The Relationship Between Yoga Participation And Health. You Down, Dog?, Bethany Forseth Hanson Dec 2019

Examining The Relationship Between Yoga Participation And Health. You Down, Dog?, Bethany Forseth Hanson

Theses and Dissertations

The prevalence of debilitating chronic diseases, such as cardiovascular disease (CVD) and Alzheimer’s disease, are increasing in the United States. Inflammation, mitochondrial dysfunction, stress and depression are common pathologies associated with these chronic diseases. Many individuals engage in yoga because they believe it will improve their health. However, research examining the impact of yoga on markers of health associated with chronic diseases is limited and often reports conflicting results. Therefore, the purpose of this dissertation is to examine the relationship between yoga and inflammation, protein content of oxidative phosphorylation complexes, stress and depression, which may support the use of lifestyle …


Medication Self-Management Behaviors Of Community-Dwelling Adults With Chronic Disease, Michelle Yvonne Williams Aug 2019

Medication Self-Management Behaviors Of Community-Dwelling Adults With Chronic Disease, Michelle Yvonne Williams

Theses and Dissertations

MEDICATION SELF-MANAGEMENT BEHAVIORS OF COMMUNITY- DWELLING

ADULTS WITH CHRONIC DISEASE

by

Michelle Y. Williams, PhD, MSN, RN

The University of Wisconsin-Milwaukee, 2019

Under the Supervision of Professor Rachel Schiffman, PhD, RN, FAAN

Chronic conditions threaten public health, individuals, and families and affect all areas of a person’s life and require significant self-management from the individual with the disease, care from the healthcare provider and team, and support from the individual’s family. The relationship of selected risk and protective factors and communication with healthcare providers to medication self-management behaviors and quality of life was examined in 616 adults with chronic disease …


Buffering Of Physiological And Affective Reactivity By A Single Proactive 5-Minute Stress Management Technique, Kayla Talia Johnson May 2019

Buffering Of Physiological And Affective Reactivity By A Single Proactive 5-Minute Stress Management Technique, Kayla Talia Johnson

Theses and Dissertations

A plethora of recent research highlights the long-term chronic disease risks of elevated blood pressure (BP), heart rate (HR) and affective and cognitive responses to mental stressors and how traditional forms of mindfulness meditation (MM) and progressive muscle relaxation (PMR) may help offset these long-term risks. On top of that, briefer forms of MM (e.g., 3-day training sessions) have shown benefits for emotional and physical health. Further, perseverative cognitions, or the tendency to worry and rumination about stressful events, is linked with heightened CV reactivity, and may impede the success of stress management techniques. The purpose of this study was …


Buffering Of Physiological And Affective Reactivity By A Single Proactive 5-Minute Stress Management Technique, Kayla Talia Johnson May 2019

Buffering Of Physiological And Affective Reactivity By A Single Proactive 5-Minute Stress Management Technique, Kayla Talia Johnson

Theses and Dissertations

A plethora of recent research highlights the long-term chronic disease risks of elevated blood pressure (BP), heart rate (HR) and affective and cognitive responses to mental stressors and how traditional forms of mindfulness meditation (MM) and progressive muscle relaxation (PMR) may help offset these long-term risks. On top of that, briefer forms of MM (e.g., 3-day training sessions) have shown benefits for emotional and physical health. Further, perseverative cognitions, or the tendency to worry and rumination about stressful events, is linked with heightened CV reactivity, and may impede the success of stress management techniques. The purpose of this study was …


A Psychometric Evaluation Of The Recovery Stress Questionnaire For Athletes (Restq-Sport), Stacy L. Gnacinski May 2017

A Psychometric Evaluation Of The Recovery Stress Questionnaire For Athletes (Restq-Sport), Stacy L. Gnacinski

Theses and Dissertations

The Recovery Stress Questionnaire for Athletes (RESTQ-Sport; Kallus & Kellmann, 2016) has been utilized in over one hundred research studies on overtraining in sport (Kallus & Kellmann, 2016). Despite recommendations from researchers to incorporate the RESTQ-Sport into existing practices for monitoring athletes’ responses to training load, gaps in the literature impede the translation of the measure from research to practice (Saw, Main, & Gastin, 2015a; Taylor, Chapman, Cronin, Newton, & Gill, 2012). To address gaps in the literature and enhance knowledge regarding the measurement nuances of the RESTQ-Sport, three systematic studies were completed in the current dissertation project. For all …


A Biobehavioral Approach To Examining Moral Distress In Critical Care Nurses, Marian Altman Jan 2017

A Biobehavioral Approach To Examining Moral Distress In Critical Care Nurses, Marian Altman

Theses and Dissertations

Moral distress is a complex and challenging problem that may cause negative biopsycohosical and professional outcomes for critical care nurses. The purpose of this work was to explore the relationship between the ethical climate of the work environment and moral distress as experienced by critical care nurses; and to explore relationships among mediators of stress (nurse characteristics e.g. education (BSN, nonBSN), years certified as a critical care nurse, and tolerance of ambiguity) and their relationship with perceived stress, moral distress, health status and salivary alpha amylase. A descriptive correlational cross-sectional design was used for this pilot study of 100 critical …


Depressive Symptoms Among College Students: An Exploration Of Fundamental Cause Theory, Peter A. Carrico Jan 2017

Depressive Symptoms Among College Students: An Exploration Of Fundamental Cause Theory, Peter A. Carrico

Theses and Dissertations

Fundamental Cause Theory suggests that socioeconomic and demographic factors are causal to various illnesses, including depression. However, no known previously existing research has used Fundamental Cause Theory to create a model of depression among college students. To do this, the present study conducted a stepwise binomial logistic regression to examine how socioeconomic status and the sociodemographic variables of Gender, Race, and Sexual Orientation, and others predict depressive symptoms in a large sample of undergraduates when controlling for stressful life events and social support (N = 2,915). Results support the hypothesis that socioeconomic disparities in depressive symptoms are the result …


The United States Medical Licensing Exam (Usmle) And Medical Student Wellness: An Ethnographic Qualitative Study At Cooper Medical School Of Rowan University, Patricia Davis Vanston Aug 2016

The United States Medical Licensing Exam (Usmle) And Medical Student Wellness: An Ethnographic Qualitative Study At Cooper Medical School Of Rowan University, Patricia Davis Vanston

Theses and Dissertations

Research indicates that medical students experience unusually high levels of stress, anxiety, depression, and loss of empathy while in medical school. As the number of medical students rises and residency positions remain stagnant, the USMLE receives greater emphasis as a barometer to determine residency placement and future career paths thereby increasing levels of stress among students. Stress is associated with diminished self-care, potentially leading to a negative impact on well-being. This ethnographic, qualitative study sought to examine the extent to which the anticipation of, preparation for, and implications of the USMLE contribute to medical student stress, wellness, and self-care. Through …


Effects Of Dietary Preference On The Experience Of Anxiety, Depression And Acute Stress Response, Shaun Stearns Dec 2014

Effects Of Dietary Preference On The Experience Of Anxiety, Depression And Acute Stress Response, Shaun Stearns

Theses and Dissertations

Research has demonstrated that high saturated fat and low carbohydrate consumption may provide physiological benefit in the treatment of major neurological disorders, though not much research has explored if these benefits extend to the experience of anxiety, depression, stress and physical symptoms. The purpose of this study was to explore the relationship between fat consumption and negative emotional/physiological states (anxiety, depression, stress and physical symptoms). This study also explored how fat consumption can alter one's response to an acute stress. Participants completed an online survey indicating their food preferences and their responses to a number of self-report scales such as …


The Effects Of Community Support On Posttraumatic Growth Outcomes For Parents Of Children With Chronic Illness, Colleen Gannon Jul 2014

The Effects Of Community Support On Posttraumatic Growth Outcomes For Parents Of Children With Chronic Illness, Colleen Gannon

Theses and Dissertations

Parents of children with chronic illnesses face many stressors on multiple fronts as a result of their child's care needs. Posttraumatic growth is positive psychological outcomes of stress for those who have experienced a traumatic event, such as the diagnosis of a child with a chronic illness. While much is known about the challenges of caring for a child with a chronic condition, there is little research on these parent's growth outcomes. Of the research that does exist, much focuses on internal predictors of posttraumatic growth, such as personality characteristics. The purpose of this study is to begin to investigate …


Integration And Impact Of Stress Management And Resiliency Training (Smart) In A Nurse Residency Program: A Feasibility Study, Sherry Chesak Dec 2013

Integration And Impact Of Stress Management And Resiliency Training (Smart) In A Nurse Residency Program: A Feasibility Study, Sherry Chesak

Theses and Dissertations

Nursing is recognized widely as a highly stressful profession, and the time of orientation is identified as the most stressful time in a nurse's career. Innovative strategies are needed to assist new registered nurses in the management and prevention of stress as a result of transitioning into the complex and challenging healthcare environment. The purpose of this study was to assess the feasibility and impact of integrating a Stress Management and Resiliency Training (SMART) program within a nurse residency program for new nurses at an academic medical center. Additional aims were to assess the effects of the program on participants' …


Walk It Off!: The Relationship Between Physically Active And Passive Coping Style And Perseverative Cognition, Michelle Rosalie Di Paolo Dec 2013

Walk It Off!: The Relationship Between Physically Active And Passive Coping Style And Perseverative Cognition, Michelle Rosalie Di Paolo

Theses and Dissertations

ABSTRACT

WALK IT OFF!: THE RELATIONSHIP BETWEEN PHYSICALLY ACTIVE AND PASSIVE COPING STYLE AND PERSEVERATIVE COGNITION

by

Michelle R. Di Paolo

The University of Wisconsin-Milwaukee, 2013

Under the Supervision of Professor Marcellus Merritt

The main aim of the current study is to assess if a relationship exists between self-selected coping styles and levels of perseverative cognition (PC). Recent pilot studies have revealed a relative distinction between the coping styles people choose when coping with stress, i.e., those that are physically active (PAC) like going for a walk, jogging, or lifting weights, and those that are physically passive (PPC) like reading …


Assessing The Effects Of Stress Resilience Training On Visual Discrimination Skills: Implications For Perceptual Resilience In U.S. Warfighters, Andrea Taylor Apr 2012

Assessing The Effects Of Stress Resilience Training On Visual Discrimination Skills: Implications For Perceptual Resilience In U.S. Warfighters, Andrea Taylor

Theses and Dissertations

Current military operational environments are highly improvised and constantly evolving, threatening the lives of U.S. warfighters. For instance, since 2001, 60% of all hostile casualties and 65% of hostile injuries in the Middle East theater have been attributed to improvised explosive devices (IEDs). IEDs are powerful physical weapons, and the stressful atmosphere they, and other operational challenges create, can also result in a range of psychological dysfunctions, including anxiety, depression, alcohol abuse, and Post-Traumatic Stress Disorder (PTSD). Not only are these issues concerning for mental health reasons, they are also problematic in terms of combat performance. Extreme arousal (i.e., stress) …


Biobehavioral Correlates In Fibromyalgia, Ann Trivigno Mcnallen Jan 2012

Biobehavioral Correlates In Fibromyalgia, Ann Trivigno Mcnallen

Theses and Dissertations

Introduction: Fibromyalgia (FMS) is a chronic pain syndrome characterized by non-restorative sleep, and fatigue. Over 75% of individuals with FMS complain of poor sleep quality and fatigue. These have been ranked by patients with FMS as having great impact on quality of life. A literature review suggested that poor sleep quality may be a predictor of increased stress and FMS symptom onset in those affected. However, no experimental studies have demonstrated a causal relationship between poor sleep and stress in people with FMS. Methods: Using a single stage cross-sectional design, the primary study aim was to compare 25 women with …


Exploring The Stress Response In New Army Nurses, Laureen Otto Sep 2009

Exploring The Stress Response In New Army Nurses, Laureen Otto

Theses and Dissertations

The study of stress is limited in professional nursing, but it is nearly non-existent in professional military nursing. The purpose of this study was to explore the relationships among psychological, environmental, biological and demographic factors of stress in new Army nurses during the Army Medical Department’s 8-week Officer Basic Leadership Course (OBLC). Using a descriptive prospective, correlational repeated measures design, 33 study participants completed two psychological stress measures (Perceived Stress Scale [PSS] and the Impact of Event Scale – Revised[IES-R]), an environmental measure (Life Experiences Survey [LES]), a biologic measure (salivary cortisol) and a demographic questionnaire at three different time …


Relationship Among Stress Of Labor, Support, And Childbirth Experience In Postpartum Mothers, Sasamon Srisuthisak Jul 2009

Relationship Among Stress Of Labor, Support, And Childbirth Experience In Postpartum Mothers, Sasamon Srisuthisak

Theses and Dissertations

Background: Due to the profound and life-changing aspects of giving birth and to each woman’s individualized birthing experience, it is important to understand the myriad of factors that contribute to a positive childbirth experience. The aims of this study were to: (1) identify factors related to a positive childbirth experience; (2) to examine relationships among women’s perceptions and personal evaluations of their childbirth experience, stress associated with labor pain, support from the nursing staff, initial contact with the baby following birth, support from partners, education, age, and obstetric history; and (3) to identify predictors of a positive childbirth experience. Method: …


Stress And Anxiety In Adhd: Links To Sensory Over-Responsivity, Stacey E. Reynolds Jan 2007

Stress And Anxiety In Adhd: Links To Sensory Over-Responsivity, Stacey E. Reynolds

Theses and Dissertations

Sensory Modulation Dysfunction (SMD) is characterized by an inability to consistently and accurately grade responses to sensory information. SMD, and specifically sensory over-responsivity (SOR), has been correlated with stress and anxiety in some developmentally delayed populations and has been associated with structures and functions of the hypothalamic-pituitary adrenal (HPA) axis. Recent attention has been given to HPA functioning in children with Attention Deficit Hyperactivity Disorder (ADHD), with a majority of studies identifying blunted or diminished cortisol patterns. In contrast, elevated cortisol has been associated with anxiety and anxious behaviors in both animal and human studies. The purpose of this study …


Impact Of Combat Stress On Mental Health Outcomes: Brfss Survey Data 2006, Emily Pedneau Jan 2007

Impact Of Combat Stress On Mental Health Outcomes: Brfss Survey Data 2006, Emily Pedneau

Theses and Dissertations

Objectives: This study sought to determine the relationship between combat experience and mental health outcomes. The study sought to determine whether age was a significant factor in poor mental health outcomes. Methods: Multiple logistic regression (n = 195,048) and multiple linear regression (n = 264,154) were performed on the 2006 Behavioral Risk Factor Surveillance System (BRFSS) survey. Veteran status and a host of demographic and health status questions were analyzed in relation to diagnosis of anxiety or depressive disorder (multiple logistic regression) and to number of days poor mental health (multiple linear regression). Results: Diagnosis of anxiety or depression was …


Relationships Among Stress, Blood Pressure, And Heart Rate Variability In Meditators, Sangthong Terathongkum Jan 2006

Relationships Among Stress, Blood Pressure, And Heart Rate Variability In Meditators, Sangthong Terathongkum

Theses and Dissertations

PROBLEM STATEMENT: Growing evidence indicates that psychological stress contributes to cardiovascular diseases through complex neuroendocrine mechanisms. Psychological stress leads to several physiological responses including increased heart rate (HR) and blood pressure (BP) as well as decreased heart rate variability (HRV) through alterations in the autonomic nervous system (ANS), specifically increased sympathetic nervous system (SNS) activity and decreased parasympathetic nervous system (PNS) activity. Meditation is thought to induce an innate relaxation response leading to reduced psychological stress. Findings from past studies have provided inconclusive evidence regarding the direction and strength of relationships among stress, BP, HRV, and meditation practice. PROCEDURES: A …


The Effects Of Footshock On The Reinforcing Efficacy Of Cocaine In Male Long-Evans Rats, Elizabeth S. Hendrick Jan 2005

The Effects Of Footshock On The Reinforcing Efficacy Of Cocaine In Male Long-Evans Rats, Elizabeth S. Hendrick

Theses and Dissertations

Many links exist between cocaine abuse and stress. The literature and laboratory studies in rats suggest that this could be because stress increases the reinforcing efficacy of cocaine. Using male Long-Evans rats, experiments in this thesis tested effects of footshock on the reinforcing efficacy of cocaine using a progressive ratio schedule of reinforcement. They also examined effects of footshock on the reinforcing efficacy of a half-maximal dose of cocaine. Finally, they tested the effects of footshock on cocaine self-administration in rats initially resistant to acquisition of cocaine self-administration. Footshock did not increase reinforcing efficacy of cocaine on a PR schedule …