Biological Psychology Commons^™

Circadian Variations And Risky Decision Making, Sana Sra

Scripps Senior Theses

Over the past decades, decision making under risk has garnered a great amount of attention both in the field of economics and psychology. Although state-dependent variabilities of risk taking are well-documented, little is known about the effects of a person’s preferred time of day, or chronotype, in risky decision making. Under circumstances of circadian mismatch (e.g., when an “early bird” makes decisions in the evening), research suggests that decision making may reflect a greater reliance on heuristics, such as using stereotypes in social judgments. However, the effects of circadian mismatch on heuristics in risky decision making are relatively unexplored. This …

Eye Movements For Learned Faces, Mariah Lehnertz

Cal Poly Humboldt theses and projects

Humans demonstrate a perceptual specialization for faces that is astonishing. This project attempts determine if and where within the perceptual process face perception and face recognition diverge at the level of eye movement behaviors. Participants were exposed to a series of 36 faces, of which six were randomly selected to be learned over five subsequent exposures; thus the same face identities served as both the novel faces (block 1) and the learned faces (block 5), allowing for the measurement of eye gaze patterns during initial face perception (novel) and face recognition (learned). These six faces were randomly assigned to different …

"I See Gay People" Gaydar Abilities In A Real-World Distribution, Benjamin Patrick Skillman

Cal Poly Humboldt theses and projects

“Gaydar” is the colloquial term for identifying someone’s sexual orientation from physical cues. Past literature has shown that people can identify someone’s sexual orientation at above chance levels. Past literature has used a 50/50 split of gay and straight faces and used non-standardized images, which can induce confounds in the results. The present study examined gaydar accuracy in a realistic distribution of straight and gay faces using standardized images and examined facial morphology for differences between gay and straight men. Participants were not found to have above chance accuracy for identifying gay faces. PCA did not identify reliable shape differences …

Dispositional Empathy And Autonomic Reactivity During A Comfort Interaction, Alaina G. Tiani

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of the current study was to examine the association between dispositional (trait) empathy and autonomic reactivity during dyadic interactions among women enrolled in undergraduate psychology courses. The primary research question was: do individuals who are deemed higher in dispositional empathy according to self-report exhibit differential autonomic reactivity patterns during a task in which they are asked to comfort another student experiencing emotional distress than those who are deemed lower in dispositional empathy? The literature on this relation has been mixed and has utilized photos or videos to evoke emotion; thus this study sought to examine the relation between …

Portion Size Influences Intake In Samburu Kenyan People Not Exposed To The Western Obesogenic Environment, Kevin P. Myers, Jeffrey M. Brunstrom, Peter J. Rogers, Jon D. Holtzman

Faculty Journal Articles

For people in the modernized food environment, external factors like food variety, palatability, and ubiquitous learned cues for food availability can overcome internal, homeostatic signals to promote excess intake. Portion size is one such external cue; people typically consume more when served more, often without awareness. Though susceptibility to external cues may be attributed to the modernized, cue-saturated environment, there is little research on people living outside that context, or with distinctly different food norms. We studied a sample of Samburu people in rural Kenya who maintain a traditional, semi-nomadic pastoralist lifestyle, eat a very limited diet, and face …

No Evidence That Portion Size Influences Food Consumption In Male Sprague Dawley Rats, Fabien Naniex, Sophie C. Pinder, Megan Y. Summers, Renee M. Rouleau, Eric Robinson, Kevin P. Myers, James E. Mccutcheon

Faculty Journal Articles

In studies of eating behavior that have been conducted in humans, the tendency to consume more when given larger portions of food, known as the portion size effect (PSE), is one of the most robust and widely replicated findings. Despite this, the mechanisms that underpin it are still unknown. In particular, it is unclear whether the PSE arises from higher-order social and cognitive processes that are unique to humans or, instead, reflects more fundamental processes that drive feeding, such as conditioned food-seeking. Importantly, studies in rodents and other animals have yet to show convincing evidence of a PSE. In this …

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 …

Our Brains Make Us Out To Be Unique In Ways We Are Not, Matthew J. Criscione, Julian Paul Keenan

Animal Sentience

Humans have long viewed themselves in a favorable light. This bias is consistent with a general pattern of self-enhancement. Neural systems in the medial prefrontal cortex underlie this way of thinking, which, even when false, may be beneficial for survival. It is hence not surprising that we often disregard contrary evidence in believing ourselves superior.

Untangling The Reciprocal Relation Of The Behavioral And Physiological Immune Systems, Baris Sevi

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the past decade, there has been an exponential increase in the study of the Behavioral Immune System (BIS), a suite of psychological processes that serves an infectious disease avoidance function. The BIS is proposed to be inherently intertwined with the physiological immune system. However, very few studies have actually demonstrated this fundamental, theoretical assumption. The purpose of this thesis was to test the possible relation between the physiological and behavioral immune systems in two studies. In Study 1 (N = 388), the relation between implied activation of the physiological immune system and BIS sensitivity was examined. Participants who reported …

Short-Term Abstinence Effects In Experienced Electronic Cigarette Users, Nicholas J. Felicione

Graduate Theses, Dissertations, and Problem Reports (ETD)

Nicotine/tobacco dependence is a problem that negatively affects health at an individual and population level. Nicotine/tobacco dependence may be best assessed by measuring withdrawal symptoms of a nicotine/tobacco user who abstains from use. Withdrawal symptoms experienced by cigarette smokers are well characterized, including deficits in attention and memory, as well as self-reported cravings, urges, and other symptoms. While withdrawal in cigarette smokers has been studied extensively, little is known about dependence and withdrawal associated with newer products, such as electronic cigarettes (ECIGs). ECIGs can deliver nicotine comparably to tobacco cigarettes, indicating that they may have the potential to cause dependence. …

A Genetically Informed Study Of Acute Threat Endophenotypes For Callous-Unemotional Traits, Ashlee A. Moore

Theses and Dissertations

Introduction. Callous-unemotional (CU) traits predict socially debilitating outcomes including Antisocial Personality Disorder and violent crime in adulthood. Despite significant research, the etiology of CU traits is not well understood. This dissertation incorporates genetic, physiological, neuroanatomical, and self-report measures to investigate the etiology of CU traits. Specifically, this project focuses on measures previously found to associate with impaired fear-processing observed in individuals high on CU. Brain morphometry for paralimbic regions of interest (ROIs) and electromyographic facial eyeblink reflex to startle and fear-potentiated startle probes were investigated as potential endophenotypes for CU traits. Methods. Two genetically informative (ages 9-20) twin samples ( …

The Effects Of Oral Contraceptives On Mood And Affect: A Meta-Analysis, Erica M. Motter

Cal Poly Humboldt theses and projects

Combined oral contraceptive (COC) pills are widely used by women of reproductive age, but there is still little conclusive evidence that exists about the mood-related side effects associated with their use. This meta-analysis examined the relationship between oral contraceptive use and mood effects such as depression and anxiety to determine what role, if any, that COCs may have in the worsening or improvement of women’s mood when taking them. Effect sizes compared the differences in women’s mood scores before taking COCs and after one or more cycles of use. Seventeen studies made up of 25 individual samples contributed 71 effect …

The Effects Of C-Tactile Afferent Stimulation On Male Orgasm And Ejaculation, Yacoub Ayed Innabi

Cal Poly Humboldt theses and projects

Orgasms and ejaculation are important for relationships and contribute significantly to life satisfaction. There is, however, a lack of research in the current literature regarding orgasm perception. This study tested the effects of endogenous oxytocin on subjective orgasm intensity, ejaculation latency, and ejaculate volume in men. At two separate test sessions, the participants were either stroked on the forearm (to release endogenous oxytocin) or tapped on the hand (to act as a control) with a cosmetic brush. The forearm contains C-tactile afferents that are believed to release oxytocin centrally and peripherally in response to slow, soft stroking stimulation. Then a …

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 …

Measuring Glutamate And Oxygen In Brain Reward Circuits In Animal Models Of Cocaine Abuse And Decision-Making, Seth Richard Batten

Theses and Dissertations--Psychology

Drug-specific reward and associated effects on neural signaling are often studied between subjects, where one group self-administers drug and a separate group self-administers a natural reinforcer. However, exposure to drugs of abuse can cause long-term neural adaptations that can affect how an organism responds to drug reward, natural reward, and their reward-associated stimuli. Thus, to isolate drug-specific effects it is important to use models that expose the same organism to all of the aforementioned. Multiple schedules provide a means of dissociating the rewarding effects of a drug from the rewarding effects of food within a single animal. Further, drug users …

Latent Growth Model Approach To Characterize Maternal Prenatal Dna Methylation Trajectories, Dana Lapato

Theses and Dissertations

Background. DNA methylation (DNAm) is a removable chemical modification to the DNA sequence intimately associated with genomic stability, cellular identity, and gene expression. DNAm patterning reflects joint contributions from genetic, environmental, and behavioral factors. As such, differences in DNAm patterns may explain interindividual variability in risk liability for complex traits like major depression (MD). Hundreds of significant DNAm loci have been identified using cross-sectional association studies. This dissertation builds on that foundational work to explore novel statistical approaches for longitudinal DNAm analyses. Methods. Repeated measures of genome-wide DNAm and social and environmental determinants of health were collected up to six …

Genome-Wide Systems Genetics Of Alcohol Consumption And Dependence, Kristin Mignogna

Theses and Dissertations

Widely effective treatment for alcohol use disorder is not yet available, because the exact biological mechanisms that underlie this disorder are not completely understood. One way to gain a better understanding of these mechanisms is to examine the genetic frameworks that contribute to the risk for developing this disorder. This dissertation examines genetic association data in combination with gene expression networks in the brain to identify functional groups of genes associated with alcohol consumption and dependence.

The first study took advantage of the behavioral complexity of human samples, and experimental capabilities provided by mouse models, by co-analyzing gene expression networks …

Behavioral Assessment Of Social Structure And Guest Provisioning Program Participation Of Zoo-Housed Giraffes (Giraffa Camelopardalis) Under Varying Spatial Availability., Fatima Ramis

UNF Graduate Theses and Dissertations

Close encounters with animals are considered integral for visitors and are trademark components of traditional educational engagement in zoological parks. As capacity for up-close encounters continue to increase with a simultaneous development in the field of animal welfare science, behavioral assessments on the role of common close encounters is timely. Giraffes (Giraffa camelopardalis) visitor feeding programs are established in approximately 57% of institutions accredited by Association of Zoos and Aquariums. Due to successful breeding and capacity building for zoological giraffe populations, this percentage will likely continue to increase. There is a great deal of variation in the environmental …

Sentience Is The Foundation Of Animal Rights, Michael L. Woodruff

Animal Sentience

Chapman & Huffman argue that the cognitive differences between humans and nonhuman animals do not make humans superior to animals. I suggest that humans have domain-general cognitive abilities that make them superior in causing uniquely complex changes in the world not caused by any other species. The ability to conceive of and articulate a claim of rights is an example. However, possession of superior cognitive ability does not entitle humans to superior moral status. It is sentience, not cognitive complexity, that is the basis for the assignment of rights and the protections under the law that accompany them.

Team Member Hormone Profiles And Group Cohesion, David Webster

Theses and Dissertations (Comprehensive)

Group cohesion in sport is associated with many positive outcomes for the team as a whole, as well as for the individuals. Hence, it is important to understand the antecedents of cohesion in various contexts, including sport. One antecedent that has yet to be examined in a sports context pertains to biological factors; specifically, the interaction of testosterone and cortisol levels. The dual-hormone hypothesis posits that testosterone levels are associated with status attainment for both individuals and groups, but only amongst those with low cortisol levels. Based on previous literature, a high testosterone-low cortisol hormonal profile should be associated with …

Diurnally Active Rodents For Laboratory Research, Roberto Refinetti, G. J. Kenagy

Psychological Sciences Faculty Publications and Presentations

Although inbred domesticated strains of rats and mice serve as traditional mammalian animal models in biomedical research, the nocturnal habits of these rodents make them inappropriate for research that requires a model with human-like diurnal activity rhythms. We conducted a literature review and recorded locomotor activity data from four rodent species that are generally considered to be diurnally active, the Mongolian gerbil (Meriones unguiculatus), the degu (Octodon degus), the African (Nile) grass rat (Arvicanthis niloticus), and the antelope ground squirrel (Ammospermophilus leucurus). Our data collected under 12L:12D light-dark cycles confirmed and expanded …

The Influence Of Depressive Symptoms On Frn Amplitude: An Eeg Study, Jonathan Burton

USC Aiken Psychology Theses

Background: Individuals diagnosed with depression demonstrate differences in neural activation patterns detectable using electroencephalogram (EEG). One of these differences has been specifically linked with the event-related potential (ERP) component called feedback-related negativity (FRN). In participants diagnosed with depression, the FRN has been shown to have larger amplitudes in response to negative feedback. However, previous research has only specifically looked at the difference of this amplitude between groups, specifically those with and those without a diagnosis of depression. Objective: The goal of the current study was to examine whether a continuous range of depressive symptoms in participants can predict FRN amplitudes, …

Effects Of Naltrexone On Alcohol And Nicotine Use In Female P Rats, Usman Z. Hamid, Michael T. Bardo Ph.D.

Posters-at-the-Capitol

Title: Effects of Naltrexone on Alcohol and Nicotine Use in Female P Rats

Author: Usman Z. Hamid, Department of Psychology, University of Kentucky

Faculty Mentor: Michael T. Bardo, Ph.D., Department of Psychology, University of Kentucky

Alcohol is the most commonly abused substance worldwide. It is often co-abused with nicotine, which increases the difficulty of cessation of both alcohol and nicotine. Despite having similar mechanisms of action, there is no single medication to treat the co-abuse. The objective of the current study is to analyze the effects of the opiate antagonist naltrexone on alcohol consumption and the co-use of alcohol and …

Diversity And Inclusion In The Science Classroom, Sowmya Anjur

Faculty Publications & Research

A Diversity, Epidemiology and social justice unit was incorporated into the Physiology and Disease curriculum in Fall 2016. Students discussed topics such as social and cultural influences on diversity thinking, and selective treatment in hospitals based on race. It was very noteworthy that students were united in their thinking regarding diversity and inclusion, despite the fact that they were from different backgrounds and diverse cultures. In 2017, additional discussions were held on equity in education. Students who were otherwise reserved were encouraged enough to express their views, and everyone appreciated the fact that they had been included.

Temporal Information Guides Prefrontal Preparatory Activity, Jacqueline R. Janowich

Shared Knowledge Conference

Proactive preparation for an upcoming goal differs from last-minute reactive adaptation, but it is unclear how preparatory mechanisms change based on when in the future a goal needs to be executed. To assess how timing information is integrated into preparatory control, we designed a novel variant of the Dot Pattern Expectancy task, where each cue signaled both task rule and delay duration (known short, known long, or unknown) between cue and probe. We recorded EEG while healthy young adult participants (n=36) performed this task, and found that delay demands elicited distinct prefrontal preparatory activities. Medial prefrontal amplitude was sensitive to …

Electrocortical Responses During Script-Driven Emotional Imagery, Nicholas Best, Cassandra Gonzalez, David Herring Ph.D.

Scholars Week

Emotional imagery is a common induction technique used in the laboratory and also employed in various exposure therapy treatments across the anxiety spectrum (e.g., specific and social phobias). Despite its clinical uses, there is a surprising dearth of literature regarding the basic central neural processes underlying emotional imagery, though other peripheral physiological processes have been investigated extensively using heart rate, skin conductance, and startle-blink responses. One imagery study that used a central nervous system psychophysiological measure -event specific brainwave or the event-related potential (ERP) technique- suggests the late positive potential (LPP) of the ERP is larger for unpleasant versus neutral …

Common Sense And Common Nonsense: A Conversation About Mental Attitudes, Science, And Society, Daniel S. Levine

Psychology Faculty Publications - Archive

Daniel S. Levine's Common Sense and Common Nonsense observes human decision making, ethics, and social organization as illuminated by the scientific disciplines of neural network theory, neuroscience, experimental psychology, and dynamical systems theory. It is a book whose aim is advocacy as well as research. Its goal is to use an understanding of our brains and minds to better operationalize Aldous Huxley's admonition to "try to be a little kinder." It wanders over examples from sociology, politics, economics, religion, literature, and many other fields but looks at all as examples of a few common themes. The "common nonsense" of the …

Validation Of The Barkley Deficits Of Executive Functioning Scale-Short Form, Brian Sheble

Dissertations

The Barkley Deficits of Executive Functioning-Short Form (BDEFS-SF) is a short rating scale measuring executive functioning in adults. The BDEFS-SF was developed using the 5 highest loading questions from the BDEFS-LF. Consequently, the psychometric qualities of the BDEFS-SF were not investigated using formal methods. In this study, the psychometric attributes of the BDEFS-SF were examined using two separate but similar groups. The first group of 264 men and women aged 18-35 years old completed the BDEFS-SF via an internet survey. The second group of 36 men and women aged 18-35 years old completed the BDEFS-SF and individualized assessments of executive …

Evidence-Based Teaching Strategies For Behavioral Neuroscience And Biological Psychology Classes, Richard Addante

Q2S Enhancing Pedagogy

Courses in Behavioral Neuroscience and Biological Psychology were taught while implementing evidence based teaching practices and several additional innovations. Students engaged in think-pair-share activities, group projects, and novel innovations of assignments including incentivized exam re-earns and creating modern memes of neuroscience content. Students exhibited evidence of learning, enjoyment, and teaching effectiveness.

Cannabinoid-Induced Behavioral Sensitization In Adolescent Sprague-Dawley Rats, Michelle Stone

Electronic Theses, Projects, and Dissertations

Adolescent cannabis use has grown because of increased availability and higher societal acceptance. This increase in cannabis use is problematic as adolescents who experiment with cannabis are more likely to abuse cannabis and experiment with other illicit drugs such as cocaine. The reason for the greater susceptibility to drugs use is unclear and may be the result of altered drug sensitivity after cannabis exposure. Thus, the present investigation used the behavioral sensitization paradigm to examine the behavioral response of early adolescent rats to the cannabinoid agonist CP 55,940 (CP) or cocaine after repeated cannabinoid administration. It was hypothesized that: (1) …