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Articles 1 - 30 of 82

Full-Text Articles in Cognition and Perception

How Philip K. Dick Used The Unreliable Narrator To Transport Unwitting Acolytes, Michael Barros, Jordi Smith Aug 2026

How Philip K. Dick Used The Unreliable Narrator To Transport Unwitting Acolytes, Michael Barros, Jordi Smith

Dialogue: The Interdisciplinary Journal of Popular Culture and Pedagogy

This essay examines the use of the unreliable narrator to transport the reader into narrative worlds, specifically in Philip K. Dick's fiction. By exploring the phenomenon of narrative transportation and the role of emotions in engagement with fiction, we argue that Dick's use of the unreliable narrator significantly engages and transports readers into his narrative worlds. Subsequently, we contend that his belief in the fundamental reality of those worlds is effectively positioning himself as a gatekeeper and mediator between the narrative world and the real world, which sets him, in his mind, as a prophet, using fiction as a tool …


Practical Considerations For Conducting Canine Behavioral Science, Lucrezia Lonardo, Madeline H. Pelgrim, Jeffrey R. Stevens Jan 2026

Practical Considerations For Conducting Canine Behavioral Science, Lucrezia Lonardo, Madeline H. Pelgrim, Jeffrey R. Stevens

Jeffrey Stevens Publications

Research on behavior in domestic dogs (Canis familiaris) has increased rapidly recently due to the interest in them as pets, working dogs, and model species for understanding evolution, domestication, and even human health. This interest in canine behavioral science has resulted in the creation of dozens of dog lab worldwide, with more starting every year. Our aim here is to review practical issues that potential dog researchers might consider when deciding how to set up a dog lab and conduct research in canine behavioral science. We hope that this can offer a path forward in promoting high-quality, cutting-edge …


Chronic Pain After Traumatic Brain Injury: Treatment Experiences And Effects On Cognition And Functioning, Rachael L. Snyder Aug 2025

Chronic Pain After Traumatic Brain Injury: Treatment Experiences And Effects On Cognition And Functioning, Rachael L. Snyder

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Traumatic brain injury (TBI) can contribute to changes in cognitive and emotional functioning, quality of life, and psychosocial reintegration. Chronic pain is a common consequence of TBI which can uniquely impact such outcomes. Still, the exact nature of the contribution of pain on post-TBI outcomes remains unclear, and there are few existing studies exploring the treatment journey for chronic pain and injury rehabilitation through qualitative methods, specifically individual interviews with TBI survivors. This study aimed to document these narratives and to identify precisely how the experiences of TBI survivors seeking treatments, rather than the treatments themselves, impact outcomes. It also …


Investigating Child-Informed Considerations For Animated Picture Symbols Representing Emotion For Aac Use In Children With Asd, Hannah Kitsmiller Apr 2025

Investigating Child-Informed Considerations For Animated Picture Symbols Representing Emotion For Aac Use In Children With Asd, Hannah Kitsmiller

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Development of emotional competence is an important area of consideration when supporting individuals who use augmentative and alternative communication (AAC). Emotional competence includes skills related to identifying and communicating about one’s emotions. Individuals who use AAC may struggle to develop strong skills in emotional competence. One potential barrier to developing emotional competence may be access to symbols that facilitate understanding of the represented emotion. Emotions are abstract and challenging to represent in visual symbols. Additionally, evidence suggests individuals with autism spectrum disorder (ASD) may have visual perceptual differences when viewing faces. Current emotion symbols are often depicted using isolated facial …


Thinking Beyond Ourselves: Using Interdisciplinary Exploration And Speculative Scenarios To Understand The Human Experience, Shannon Kundey Jan 2025

Thinking Beyond Ourselves: Using Interdisciplinary Exploration And Speculative Scenarios To Understand The Human Experience, Shannon Kundey

Honors in Practice Online Archive

This essay presents an interdisciplinary seminar in honors that challenges students to move beyond the limitations of human experience and examine cognition and behavior across species, environments, and hypothetical extraterrestrial minds. A Choose Your Own Adventure structure encourages reflection on cognitive biases, thereby fostering a nuanced understanding of intelligence, perspective, and sociality. Author observes that students benefit from frameworks that disrupt human-centered biases and suggests that engaging students in speculative scenarios prompts confronting and questioning assumptions about intelligence, ethics, and social dynamics.


Dataset For "The Role Of Metacognition And Confidence In Quantitative Reasoning In College Biology Courses", Joseph Dauer, Anum Khushal, Brian A. Couch, Robert L. Mayes, Kent Rittschof Jan 2025

Dataset For "The Role Of Metacognition And Confidence In Quantitative Reasoning In College Biology Courses", Joseph Dauer, Anum Khushal, Brian A. Couch, Robert L. Mayes, Kent Rittschof

School of Natural Resources: Faculty Publications

Quantitative modelling is a fundamental skill for biology students with performance determined by a host of cognitive and metacognitive resources and requiring instructors to integrate key quantitative dimensions into teaching biology. Using an assessment of quantitative modelling in biology, we explored biology students’ (n = 930 higher education students) modelling practices (i.e., abilities to create, test, revise), metacognition about the nature of models and confidence in their capabilities to model. Students performed best on items related to understanding variables used in models and performed more poorly on items related to interpreting, creating, and using models to understand biological phenomena. …


The Effect Of Need For Closure, Gender Essentialism, And Contact On Transphobia, Jacob E. Vargas Jan 2025

The Effect Of Need For Closure, Gender Essentialism, And Contact On Transphobia, Jacob E. Vargas

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Using a motivated social cognition framework, this study explores whether there is an indirect effect of need for closure on transphobia via gender essentialism and whether this relationship is moderated by transgender contact. Data were collected from an undergraduate sample of 405 cisgender participants (nmen = 159, nwomen = 246). A simple mediation and a moderated mediation were used to examine the hypothesized relationships, controlling for participant gender. Results reinforced the positive correlation between gender essentialism and transphobia and the negative correlation between transgender contact and transphobia. However, the mediation and moderation hypotheses were not supported. Need …


Cognitive Interviewing Within A Mixed Methods Practice: Utilization And Methodological Exploration Of Cognitive Interviewing, Jack Riley Hebner Dec 2024

Cognitive Interviewing Within A Mixed Methods Practice: Utilization And Methodological Exploration Of Cognitive Interviewing, Jack Riley Hebner

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Cognitive interviewing (CI) is a memory-enhancing technique used to extract more valid data from participants by addressing cognitive needs. Present research applied CI to program evaluation, theorizing that more quality data would be retrieved, especially when utilizing a mixed methods approach. The program chosen to further explore this technique and provide potentially invaluable evaluation data was the Educational Psychology Department at the University of Nebraska-Lincoln (EDPS). The sample consisted of 32 individuals, consisting of graduate students and faculty across all programs.

The overall evaluation focused on inter-program and inner program understanding which is operationalized as the ability to relay how …


Trust Me: Film + Q&A (February 22, 2024, 5:30 Pm, Sheldon Museum Of Art) [Poster], Sheldon Museum Of Art, University Of Nebraska-Lincoln Feb 2024

Trust Me: Film + Q&A; (February 22, 2024, 5:30 Pm, Sheldon Museum Of Art) [Poster], Sheldon Museum Of Art, University Of Nebraska-Lincoln

Sheldon Museum of Art: Catalogs and Publications

Poster for Trust Me: Film + Q&A held February 22, 2024 at 5:30 PM at the Sheldon Museum of Art (University of Nebraska-Lincoln, Lincoln, Nebraska, United States).

Poster blurb:

In today's information landscape, how do you know whom--and what--you can trust? Watch the award-winning, feature-length documentary Trust Me, which explores how media technology is influencing society and what we can do about it.

A Q&A with Rosemary Smith, filmmaker and managing director of the non-partisan Getting Better Foundation, follows.

More information about the screening is available at https://news.unl.edu/newsrooms/today/article/trust-me-documentary-to-screen-at-sheldon/.

More information about the film is available at https://www.trustmedocumentary.com/ …


Social Science Researchers' Perceptions Of Inclusive Research Practices For Transgender And Gender Diverse Communities, Christen Seyl Mar 2023

Social Science Researchers' Perceptions Of Inclusive Research Practices For Transgender And Gender Diverse Communities, Christen Seyl

Honors Program: Senior Projects (Public)

Social sciences research has historically excluded or marginalized of transgender and gender diverse (TGD) people. Although TGD affirming research materials can help improve relationships with TGD communities, these sorts of materials are not standard practice. The present study aimed to determine what factors influence social science researchers’ (SSR) willingness to incorporate affirming practices into their research. We hypothesized that more culturally competent SSR will view TGD affirming research materials as more affirming and be more willing to use similar materials in their work. In this study, SSR (n = 32) viewed and rated affirmation and willingness to use five affirming …


Correlation Of The Anterior Salience Network With Attention: A Resting-State Fmri Analysis, Matthew Brooks May 2022

Correlation Of The Anterior Salience Network With Attention: A Resting-State Fmri Analysis, Matthew Brooks

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Background: Some studies have broadened our understanding of attention while other studies have used resting-state functional magnetic resonance imaging (fMRI) analyses to identify brain regions that are functionally connected and may be associated with salience processing. This thesis sought to examine the relationship between the anterior salience network and attentional control. The current study hypothesized that resting-state functional connectivity between regions of the anterior salience network would be associated with attentional control ability. Methods: Forty-eight college-aged students completed the affective Stroop task to assess attentional regulation ability. Accuracy on trials of the task was examined in correlation with resting-state functional …


The Evolution Of Quantitative Sensitivity, Margaret A H Bryer, Sarah E. Koopman, Jessica F. Cantlon, Steven T. Piantadosi, Evan L. Maclean, Joseph M. Baker, Michael J. Beran, Sarah M. Jones, Kerry E. Jordan, Salif Mahamane, Andreas Nieder, Bonnie M. Perdue, Friederike Range, Jeffrey R. Stevens, Masaki Tomonaga, Dorottya Ujfalussy, Jennifer Vonk Jan 2022

The Evolution Of Quantitative Sensitivity, Margaret A H Bryer, Sarah E. Koopman, Jessica F. Cantlon, Steven T. Piantadosi, Evan L. Maclean, Joseph M. Baker, Michael J. Beran, Sarah M. Jones, Kerry E. Jordan, Salif Mahamane, Andreas Nieder, Bonnie M. Perdue, Friederike Range, Jeffrey R. Stevens, Masaki Tomonaga, Dorottya Ujfalussy, Jennifer Vonk

Jeffrey Stevens Publications

The ability to represent approximate quantities appears to be phylogenetically widespread, but the selective pressures and proximate mechanisms favouring this ability remain unknown. We analysed quantity discrimination data from 672 subjects across 33 bird and mammal species, using a novel Bayesian model that combined phylogenetic regression with a model of number psychophysics and random effect components. This allowed us to combine data from 49 studies and calculate the Weber fraction (a measure of quantity representation precision) for each species. We then examined which cognitive, socioecological and biological factors were related to variance in Weber fraction. We found contributions of phylogeny …


Beauty And Lifestyle Subscription Services: A Modern Retailing Format For The Vigilante Collaborative Consumption Consumer, Melisa Spilinek May 2021

Beauty And Lifestyle Subscription Services: A Modern Retailing Format For The Vigilante Collaborative Consumption Consumer, Melisa Spilinek

Department of Textiles, Merchandising and Fashion Design: Dissertations, Theses, and Student Research

Advancements in technology and ease of use of online shopping via phone applications (apps) and subscription services have fundamentally changed how consumers shop. Now more than ever, consumers are turning to time-saving technological tools that are subscription services. Subscription services provide a multitude of benefits to consumers and contribute to collaborative consumption in nearly every product and service category from coffee to apparel. To investigate beauty and lifestyle subscription services and collaborative consumption this study will utilize a mixed methods convergent design to analyze user experience including price sensitivity, subscription service apps and ease of use. Anticipated contributions to the …


Metacognitive Function In Moderate To Severe Traumatic Brain Injury, Grace Amadon May 2021

Metacognitive Function In Moderate To Severe Traumatic Brain Injury, Grace Amadon

Honors Program: Senior Projects (Public)

Traumatic brain injury (TBI) is an injury to the brain caused by a bump, blow, jolt to the head. Individuals with TBI demonstrate decreased awareness of their own potential deficits and functional abilities. These deficits have critical implications for recovery as self-awareness is important for those recovering from TBI in the implementation and engagement of rehabilitative processes after TBI. The following study analyzed 18 individuals with TBI approximately 11 years post injury to document metacognitive functioning after injury. Participants completed a metacognitive working-memory paradigm where they made judgements of their future and past performance on identifying a target shape and …


Effects Of Mindfulness Meditation On Selective, Sustained Attention, Brain Neural Oscillations, And Short-Term Memory, Anamaria Guzman Feb 2021

Effects Of Mindfulness Meditation On Selective, Sustained Attention, Brain Neural Oscillations, And Short-Term Memory, Anamaria Guzman

Honors Program: Senior Projects (Public)

The following extended literature review and research proposal study started initially as a complete research proposal but, due to the challenges COVID-19 has brought, it has become a stand-alone piece of work without data collection. The goal is to synthesize a broad range of literature and previous research on mindfulness meditation and its effects on attention, memory, and brain activity and thus, offering a new perspective and a proposed research path on this subject. This proposed research study, besides previous studies, indicates that mindfulness meditation is expected to improve and enhance selective and sustained attention, which results in better attentional …


Effects Of Human-Animal Interactions On Affect And Cognition, Elise L. Thayer, Jeffrey R. Stevens Jan 2021

Effects Of Human-Animal Interactions On Affect And Cognition, Elise L. Thayer, Jeffrey R. Stevens

Jeffrey Stevens Publications

Human-animal interaction has clear positive effects on people’s affect and stress. But less is known about how animal interactions influence cognition. We draw parallels between animal interactions and exposure to natural environments, a research area that shows clear improvements in cognitive performance. The aim of this study is to investigate whether interacting with animals similarly enhances cognitive performance, specifically executive functioning. To test this, we conducted two experiments in which we had participants self-report their affect and complete a series of cognitive tasks (long-term memory, attentional control, and working memory) before and after either a brief interaction with a dog …


Dog And Owner Characteristics Predict Training Success, Jeffrey R. Stevens, London M. Wolff, Megan Bosworth, Jill Morstad Jan 2021

Dog And Owner Characteristics Predict Training Success, Jeffrey R. Stevens, London M. Wolff, Megan Bosworth, Jill Morstad

Jeffrey Stevens Publications

Teaching owners how to train their dogs is an important part of maintaining the health and safety of dogs and people. Yet we do not know what behavioral characteristics of dogs and their owners are relevant to dog training or if owner cognitive abilities play a role in training success. The aim of this study is to determine which characteristics of both dogs and owners predict success in completing the American Kennel Club Canine Good Citizen training program. Before the first session of a dog training course, owners completed surveys evaluating the behavior and cognition of their dog and themselves. …


Attribute-Based Choice, Francine W. Goh, Jeffrey R. Stevens Jan 2021

Attribute-Based Choice, Francine W. Goh, Jeffrey R. Stevens

Jeffrey Stevens Publications

Alternative-based approaches to decision making generate overall values for each option in a choice set by processing information within options before comparing options to arrive at a decision. By contrast, attribute-based approaches compare attributes (such as monetary cost and time delay to receipt of a reward) across options and use these attribute comparisons to make a decision. Because they compare attributes, they may not use all available information to make a choice, which categorizes many of them as heuristics. Choice data have suggested that attribute-based models can better predict choice compared to alternative-based models in some situations (e.g., when there …


Are Capuchin Monkeys (Sapajus Spp.) Sensitive To Lost Opportunities? The Role Of Opportunity Costs In Intertemporal Choice, Elsa Addessi, Valeria Tierno, Valentina Focaroli, Federica Rossi, Serena Gastaldi, Francesca De Petrillo, Fabio Paglieri, Jeffrey R. Stevens Jan 2021

Are Capuchin Monkeys (Sapajus Spp.) Sensitive To Lost Opportunities? The Role Of Opportunity Costs In Intertemporal Choice, Elsa Addessi, Valeria Tierno, Valentina Focaroli, Federica Rossi, Serena Gastaldi, Francesca De Petrillo, Fabio Paglieri, Jeffrey R. Stevens

Jeffrey Stevens Publications

Principles of economics predict that the costs associated with obtaining rewards can influence choice. When individuals face choices between a smaller, immediate option and a larger, later option, they often experience opportunity costs associated with waiting for delayed rewards because they must forego the opportunity to make other choices. We evaluated how reducing opportunity costs affects delay tolerance in capuchin monkeys. After choosing the larger option, in the High cost condition, subjects had to wait for the delay to expire, whereas in the Low cost different and Low cost same conditions, they could perform a new choice during the delay. …


Excluder: An R Package That Checks For Exclusion Criteria In Online Data, Jeffrey R. Stevens Jan 2021

Excluder: An R Package That Checks For Exclusion Criteria In Online Data, Jeffrey R. Stevens

Jeffrey Stevens Publications

Collecting survey data online can result in low-quality data. Survey participants may not complete the survey, may complete the survey too quickly or slowly, may not reside in the country they claim, or may use unacceptable screen types. Also, online surveys are plagued by automated bots attempting to complete the surveys while offering worthless data. Researchers collecting online data may want to check their data for these and other potential criteria to exclude problematic data entries. The excluder package uses three main function types to mark, check, and exclude data based on seven different exclusion criteria.


Improving Measurements Of Similarity Judgments With Machine-Learning Algorithms, Jeffrey R. Stevens, Alexis Polzkill Saltzman, Tanner Rasmussen, Leen-Kiat Soh Jan 2021

Improving Measurements Of Similarity Judgments With Machine-Learning Algorithms, Jeffrey R. Stevens, Alexis Polzkill Saltzman, Tanner Rasmussen, Leen-Kiat Soh

Jeffrey Stevens Publications

Intertemporal choices involve assessing options with different reward amounts available at different time delays. The similarity approach to intertemporal choice focuses on judging how similar amounts and delays are. Yet we do not fully understand the cognitive process of how these judgments are made. Here, we use machine-learning algorithms to predict similarity judgments to (1) investigate which algorithms best predict these judgments, (2) assess which predictors are most useful in predicting participants’ judgments, and (3) determine the minimum number of judgments required to accurately predict future judgments. We applied eight algorithms to similarity judgments for reward amount and time delay …


Exercise Shifts Hypothetical Food Choices Toward Greater Amounts And More Immediate Consumption, Karsten Koehler, Safiya E. Beckford, Elise Thayer, Alexandra R. Martin, Julie B. Boron, Jeffrey R. Stevens Jan 2021

Exercise Shifts Hypothetical Food Choices Toward Greater Amounts And More Immediate Consumption, Karsten Koehler, Safiya E. Beckford, Elise Thayer, Alexandra R. Martin, Julie B. Boron, Jeffrey R. Stevens

Jeffrey Stevens Publications

Although exercise modulates appetite regulation and food intake, it remains poorly understood how exercise impacts decision-making about food. The purpose of the present study was to assess the impact of an acute exercise bout on hypothetical choices related to the amount and timing of food intake. Forty-one healthy participants (22.0 ± 2.6 years; 23.7 ± 2.5 kg/m 2 , 56% female) completed 45 min of aerobic exercise and a resting control condition in randomized order. Food amount preferences and intertemporal food preferences (preference for immediate vs. delayed consumption) were assessed using electronic questionnaires with visual food cues. Compared to rest, …


Influence Of Convenience, Time-Savings, Price, And Product Variety On Amazon Prime Members And Non-Prime Shoppers’ Online Apparel Purchase Intention, Md Rashaduzzaman Dec 2020

Influence Of Convenience, Time-Savings, Price, And Product Variety On Amazon Prime Members And Non-Prime Shoppers’ Online Apparel Purchase Intention, Md Rashaduzzaman

Department of Textiles, Merchandising and Fashion Design: Dissertations, Theses, and Student Research

The number of internet users and online shoppers in the United States has grown at an incredible rate over the past few decades. Greater convenience and availability of a wide assortment of apparel products at a cheaper price made online shopping very enticing to consumers. Amazon.com (Amazon) gained unprecedented popularity among consumers with its Amazon Prime program. Amazon’s retail revolutions changed consumer’s way of shopping and expectations. Both online and physical store retailers are facing tremendous pressure to fulfill that level of expectation. Thus, it is essential for retailers clearly understand the shopping expectations and preferences of Amazon Prime members …


Developing A Computer-Controlled Treat Dispenser For Canine Operant Conditioning, Walker Arce, Jeffrey R. Stevens Jan 2020

Developing A Computer-Controlled Treat Dispenser For Canine Operant Conditioning, Walker Arce, Jeffrey R. Stevens

Jeffrey Stevens Publications

When performing canine operant conditioning studies, the delivery of the reward can be a limiting factor of the study. While there are a few commercially available options for automatically delivering rewards, they generally require manual input, such as using a remote control, in accordance with the experiment script. This means that human reaction times and transmission distances can cause interruptions to the flow of the experiment. The potential for development of non-supervised conditioning studies is limited by this same factor. To remedy this, we retrofitted an off-the-shelf treat dispenser with new electronics that allow it to be remotely controllable as …


Changes In Hemodynamic Response To Faces, Scenes, And Objects In A Visual Statistical Learning Task: An Fmri Analysis, Aaron T. Halvorsen May 2019

Changes In Hemodynamic Response To Faces, Scenes, And Objects In A Visual Statistical Learning Task: An Fmri Analysis, Aaron T. Halvorsen

Honors Program: Senior Projects (Public)

Learning causes changes in brain activity and neural connections. Statistical learning is an implicit learning process that involves extracting regularities from the environment and finding patterns in stimuli based on their transitional probabilities. The following study describes an attempt to elucidate temporal changes in hemodynamic activity for three category-specific brain areas using functional magnetic resonance imaging (fMRI). Blood oxygen-level dependent signal (BOLD) responses were collected while subjects viewed faces, scenes, and objects with high and low transitional probabilities in an fMRI scanner. We expected brain activity to show a temporal shift in timing of activation when comparing BOLD signal responses …


Objectification In Heterosexual Romantic Relationships: Examining Relationship Satisfaction Of Female Objectification Recipients And Male Objectifying Perpetrators, Gemma Sáez, Abigail R. Riemer, Rebecca L. Brock, Sarah J. Gervais Jan 2019

Objectification In Heterosexual Romantic Relationships: Examining Relationship Satisfaction Of Female Objectification Recipients And Male Objectifying Perpetrators, Gemma Sáez, Abigail R. Riemer, Rebecca L. Brock, Sarah J. Gervais

Department of Psychology: Faculty Publications

Sexual objectification is one of most the common manifestations of discrimination against women in Western societies; however, few studies have examined objectification in the context of romantic relationships. The primary aim of the present research was to bring the study of objectification phenomena into the setting of heterosexual romantic relationships. The present set of studies examined the relation between sexual objectification and relationship satisfaction for both the sexual objectification recipient (Study 1) and the sexual objectification perpetrator (Study 2). The results of the first study with 206 U.S. undergraduate female students in committed romantic relationships replicated a previously identified negative …


The Role Of Visual And Verbal Processes In False Memory Susceptibility On The Misinformation Effect, John E. Kiat Jul 2018

The Role Of Visual And Verbal Processes In False Memory Susceptibility On The Misinformation Effect, John E. Kiat

Department of Psychology: Dissertations, Theses, and Student Research

The goal of this dissertation is to investigate links between susceptibility to misinformation on the misinformation effect paradigm and individual differences in visual and verbal source monitoring ability. Results from four studies are reported. The first three studies assess links between individual differences in perceptual misinformation endorsement levels and visualization (Word-As-Picture) as well as verbalization (Picture-As-Word) errors on the memory test of a source monitoring task in which a set of objects were initially presented either as pictures or words during study. In Study 1, this picture-word source monitoring task and a misinformation effect paradigm, with a True/False test format, …


The Signature Of Undetected Change: An Exploratory Electrotomographic Investigation Of Gradual Change Blindness, John E. Kiat, Michael D. Dodd, Robert F. Belli, Jacob E. Cheadle Jan 2018

The Signature Of Undetected Change: An Exploratory Electrotomographic Investigation Of Gradual Change Blindness, John E. Kiat, Michael D. Dodd, Robert F. Belli, Jacob E. Cheadle

Department of Psychology: Faculty Publications

Neuroimaging-based investigations of change blindness, a phenomenon in which seemingly obvious changes in visual scenes fail to be detected, have significantly advanced our understanding of visual awareness. The vast majority of prior investigations, however, utilize paradigms involving visual disruptions (e.g., intervening blank screens, saccadic movements, “mudsplashes”), making it difficult to isolate neural responses toward visual changes cleanly. To address this issue in this present study, high-density EEG data (256 channel) were collected from 25 participants using a paradigm in which visual changes were progressively introduced into detailed real-world scenes without the use of visual disruption. Oscillatory activity associated with undetected …


Social Contact Patterns Can Buffer Costs Of Forgetting In The Evolution Of Cooperation, Jeffrey R. Stevens, Jan K. Woike, Lael J. Schooler, Stefan Lindner, Thorsten Pachur Jan 2018

Social Contact Patterns Can Buffer Costs Of Forgetting In The Evolution Of Cooperation, Jeffrey R. Stevens, Jan K. Woike, Lael J. Schooler, Stefan Lindner, Thorsten Pachur

Jeffrey Stevens Publications

Analyses of the evolution of cooperation often rely on two simplifying assumptions: (i) individuals interact equally frequently with all social network members and (ii) they accurately remember each partner's past cooperation or defection. Here, we examine how more realistic, skewed patterns of contact—in which individuals interact primarily with only a subset of their network's members—influence cooperation. In addition, we test whether skewed contact patterns can counteract the decrease in cooperation caused by memory errors (i.e. forgetting). Finally, we compare two types of memory error that vary in whether forgotten interactions are replaced with random actions or with actions from previous …


Mesotocin Influences Pinyon Jay Prosociality, Juan Duque, Whitney Leichner, Holly Ahmann, Jeffrey R. Stevens Jan 2018

Mesotocin Influences Pinyon Jay Prosociality, Juan Duque, Whitney Leichner, Holly Ahmann, Jeffrey R. Stevens

Jeffrey Stevens Publications

Many species exhibit prosocial behavior, in which one individual’s actions benefit another individual, often without an immediate benefit to itself. The neuropeptide oxytocin is an important hormonal mechanism influencing prosociality in mammals, but it is unclear whether the avian homologue mesotocin plays a similar functional role in birds. Here, we experimentally tested prosociality in pinyon jays (Gymnorhinus cyanocephalus), a highly social corvid species that spontaneously shares food with others. First, we measured prosocial preferences in a prosocial choice task with two different payoff distributions: Prosocial trials delivered food to both the subject and either an empty cage or a partner …