Towards a physio-cognitive model of slow-breathing

How may controlled breathing be beneficial, or detrimental to behavior? Computational process models are useful to specify the potential mechanisms that lead to behavioral adaptation during different breathing exercises. We present a physio-cognitive model of slow breathing implemented within a hybrid cognitive architecture, ACT-R/Φ. Comparisons to data from an experiment indicate that the physiological mechanisms are operating in a manner that is consistent with actual human function. The presented computational model provides predictions of ways that controlled breathing interacts with mechanisms of arousal to mediate cognitive behavior. The increasing use of breathing techniques to counteract effects of stressors makes it more important to have a detailed mechanistic account of how these techniques may affect behavior, both in ways that are beneficial and detrimental. This multi-level understanding is useful for adapting to changes in our physical and social environment, not only for performance, but for physical and mental health

Behavioural effects of caffeine: the specificity hypothesis

This thesis argues that caffeine use offered a survival advantage to our ancestors and that moderate use continues to offer modern humans benefits. Caffeine ingestion, through the blocking of adenosine receptors, elicits broad elements of the mammalian threat response, specifically from the ‘flight or fight’ and ‘tend and befriend’ repertoires of behaviour: in effect, caffeine hijacks elements of the stress response. If the effects of caffeine had been discovered recently, rather than being available to Homo sapiens since Neolithic hunter gatherer times, it is likely that caffeine would be considered a ‘smart’ drug. More caffeine is being ingested today than ever previously recorded. Caffeine use is found across all age groups, all socio-economic strata, most ethnic groups, and is being used increasingly by the medical and pharmaceutical industries and by the armed forces. Yet despite this wide usage and a substantial body of research literature, there is at present no clear pattern or plausible model for the way caffeine achieves its effects. There is much contradiction in the literature and ambiguity as to why caffeine use should improve performance on some tasks, impair it on others and have no effect on other tasks, for some but not all of the time. The present work argues, through an examination of the specificity of caffeine’s operation, that these effects are not arbitrary but elicited by the nature of the tasks, in particular that caffeine ingestion affects those processes and behaviours which improve the probability of survival under perceived threat or stress. This is argued through the perspective of evolutionary psychology and relies theoretically on Polyvagal Theory. The argument generates testable hypotheses and empirical support for the thesis is garnered from nine experiments on card-sorting, verbal and numerical processing, local and global categorization, field dependence-independence, the Stroop task, tests of visuo-spatial ability, and from a correlational study of caffeine use and personality traits. It is concluded that moderate caffeine use in healthy adults promotes behaviours likely to be adaptive under perceived threat or stress. Limitations of both theory and empirical work and are discussed, together with potential practical applications and suggestions for further work

Communicating while stimulated: the effects of sensory-processing sensitivity on behavior and relationships

In light of claims made by Aron (1996, 2000; Aron & Aron, 1997), this dissertation tested the influence of sensory-processing sensitivity on communication via two sets of research questions. First, are highly sensitive persons more easily aroused by stimulation, and if so does this necessarily cause a decrease in affect recognition? Results of an experimental study (N = 342) indicate that highly sensitive persons (HSPs) were more distracted by audio stimulation, causing more errors in accuracy judgments on non-verbal decoding tests, most noticeably for facial expression detection. The implication is that, when aroused by stimulation in their environment, HSPs may be less interpersonally sensitive. The question concerned with claims about highly sensitive men in relationships and their supposed “feminine” nature (Aron, 2000). Thus, it is asked, Are highly sensitive men (HSM) in romantic relationships, as compared to non-sensitive men, more expressive of their emotions and more understanding of partners, qualities which supposedly create greater gender role stress because they do not meet American norms for masculinity? Results demonstrate that HSM reported are expressive of negative emotions (e.g., being bothered) and experience greater gender role stress, qualities which may lead partners of HSM to report lower satisfaction. The implication is that if HSM are more easily bothered and more emotionally reactive, then they are more expressive of negative feelings, a quality which is detrimental for relationships if these complaints are viewed as criticisms (Gottman, 1990). Overall, the studies suggest the communication behaviors of HSPs are influenced in mostly negative ways because of low thresholds for stimulation. Importantly, though, effects were generally small and hard to detect in the sample sizes reported here, and the current measure of SPS seems to be inappropriate for measuring the complete conceptual breadth of the construct. A number of intrapersonal, individual, and interpersonal directions for future research are suggested

Hope College Abstracts: 12th Annual Celebration of Undergraduate Research and Creative Performance

The 12th Annual Celebration of Undergraduate Research and Creative Performance was held on April 12, 2013 in the Richard and Helen DeVos Fieldhouse at Hope College. It featured over 300 student-faculty collaborative research projects. This book of abstracts is a record reflective of those projects between the 2012-2013 academic year

Examining How Cardiologists Address Alcohol and Substance Use in Their Adolescent and Young Adult Patients Diagnosed with Cardiac Rhythm Disorders

An arrhythmia, or cardiac rhythm disorder, is characterized by a change in the normal pattern of electrical impulses that occur in the heart. Cardiac arrhythmias can be life-threatening. Adolescents and young adults who have arrhythmias experience challenges of youth coupled with the medical challenges associated with their diagnoses. Cardiologists who treat these patients are faced with an ongoing need for decision-making surrounding addressing alcohol and substance use, which can be prevalent in adolescent and young adult populations. This qualitative study explored what guides physicians’ decision-making, as well as physicians’ beliefs and practices regarding how they address alcohol and substance use in their cardiac rhythm disorder patients

Perceiving the Good: An Agent Relative Account of Desire

In this project I investigate and develop a theory of desire primarily focused on the metaphysics of desire. Since my theory of desire is an evaluative theory, I address discussions concerning value and goodness, and its relation to the ethics and metaphysics of desire. Defining a desire is a complex endeavor and so is determining how desires fit within our mental economy. To locate my position, I begin with an investigation of various, often opposing, theories of desire. I examine motivational theories, pleasure-based theories, reward/learning accounts, and evaluative models. Ultimately, I argue that none of these theories provides adequate explanation for the metaphysics or phenomenology of desire. After providing arguments against these approaches, I develop my position called the “agent relative” model. I argue that desire is affective and that all affect requires an attachment to the object. Attachments are essentially self-regarding; therefore, desire is essentially self-regarding. I argue that for S to desire P, is for S to see P as good-for S. It may be that for S to desire P, is for S to experience P as good rather than experiencing P as good for S’s own wellbeing. Nevertheless, I argue for the latter and hold that the former can be true of hope, but that hope and desire are different. Finally, I argue that given my evaluative theory of desire, a modified desire satisfaction account of well-being can connect the truths found in standard desire satisfaction models with an objective list model of well-being

The teen years explained: a guide to healthy adolescent development

1. Physical Development -- 2. Cognitive Development -- 3. Emotional & Social Development -- 4. Forming an Identity -- 5. Sexuality -- 6. Spirituality & Religion -- 7. Profiles of Development -- 8. Conclusion -- Resources & Further Reading -- Referencesby Clea McNeely and Jayne Blanchard ; with a foreword by Nicole Yohalem, Karen PittmanAlso available via the World Wide Web.Includes bibliographical references (p. 94-102) and index.The Guide was made possible by funding from the Centers for Disease Control and Prevention (CDC) to the Center for Adolescent Health at the Johns Hopkins Bloomberg School of Public Health, a member of the Prevention Research Centers Program, CDC cooperative agreement 1-U48-DP-000040

Synesthesia : a sixth sense or a sensation : a research project based upon interviewing persons with color synesthesia

Synesthesia is a peculiar neurological phenomenon that occurs when two senses combine. For example, seeing the colors of words, letters, and music or feeling the shapes of tastes and smells are types of synesthesia. Persons who experience these sensations are called synesthetes. I am one of a small percentage of the population who see language in color. Although writers, poets, and artists have historically intertwined color and language in a metaphoric way, letters and words literally appear in my mind in a color-coded sequence. While synesthesia is an involuntary, sometimes disruptive process for those who experience it, most synethetes cannot imagine living without the phenomena. My research was undertaken by means of a constructed survey of persons with synesthesia to examine how the condition has impacted each subject\u27s life in terms of aversion to different colors related to traumatic incidents, physical and/or mental illness, psychotropic interventions (such as SSRI drugs), prevalence within gender, and color coded-memories. The paper discusses how medical and mental health professions can better understand the association between colors and the emotional effects pertaining to a particular color is it is associated with an unpleasant memory or traumatic event. Lastly, because Synesthesia is defined as a cross-firing in the nervous system, a small portion of the survey asked participants to disclose if he or she had any neurological conditions that were prevalent within synesthesia population

Experiences of living with epilepsy

Approximately 50 million people worldwide and one in every 100 South Africans, live with epilepsy. The challenges of epilepsy are not limited to the physical manifestations of the disease i.e. seizures. Public perceptions of epilepsy contribute significantly to an individual’s experience of living with epilepsy. Stigmatisation of epilepsy occurs worldwide and presents in varying forms. Enacted stigma refers to overt acts of discrimination against people with epilepsy and perceived (or “felt”) stigma is the feeling of shame and fear of being stigmatised as a person with epilepsy. Epilepsy stigma is considered to be one of the most important factors that have a negative influence on people with epilepsy. There is a noticeable difference in the nature of epilepsy stigma between developed and developing countries, and even between communities within the same country. This difference suggests that epilepsy stigma is shaped by differences in education, cultural values, access to healthcare, quality of care and legal rules. There is very little research on epilepsy-associated stigma emerging from South Africa. The aim of this study is to describe the lived experience of living with epilepsy and the associated stigma. Following qualitative methods, using an ethnographic approach, 10 semi-structured interviews with people with epilepsy were conducted. The complexity of studying the subjective experience of stigmatisation lends itself well to this approach. Participants were identified through the Western Cape branch of Epilepsy South Africa and recruited from various communities in Cape Town, South Africa. Data was analysed using Braun and Clarke’s (2006) principles of thematic analysis. The participants reported a broad range of subjective experiences and perspectives of living with epilepsy. Across all participants, the factors which played an impactful role on their lives was the social support they received, the public understanding of the community they lived in, the daily reminders of being “different” and living with the fear of not knowing when the next seizure will occur. By nature of this study’s design, the findings from this study cannot be generalised to South Africa. However, this study offers a glimpse into the subjective experience of living with epilepsy from individuals residing in different communities in Cape Town, South Africa. The findings show a broad range of experiences which are mediated by external influences. The findings suggest a need for further research into the challenges people with epilepsy face across communities within South Africa.PsychologyM.A. (Psychology