GEOL2017MCGUIRE35162 GEOL
Type: Graduate
Author(s):
Preston McGuire
Geological Sciences
Advisor(s):
Xaingyang Xie
Geological Sciences
View PresentationThe Late Paleozoic Ouachita fold-and-thrust belt extends from the southern terminus of the Appalachian thrust belt in eastern Mississippi up through central Arkansas, southeastern Oklahoma, and Texas terminating in northeastern Mexico. A series of Carboniferous foreland basins were formed sequentially to the thrust front. The interaction between the Laurentian craton and the Appalachian-Ouachita orogenic belts controlled sedimentation in the southern midcontinent region throughout the Paleozoic. In contrast to the Appalachian orogenic belt to the east, the Ouachita orogenic belt and associated sediments remain poorly documented and less constrained.
In this study, seven Ordovician to Mississippian aged clastic units from the Ouachita Mountain in central Arkansas were sampled and tested using U-Pb detrital zircon geochronology. Three major age peaks are prominent, including the Grenville Province (~0.95-1.2 Ga), the Granite-Rhyolite Province (~1.3-1.5 Ga), and the Superior Province (>~2.5 Ga) in Ordovician to Silurian aged rocks. A change in this signature becomes clear at the beginning of the Carboniferous from Early Mississippian Stanley Group samples showing the additional Paleozoic age peak (~490-520 Ma) potentially derived from the Appalachian orogenic belt to the east, and/or from peri-Gondwanan terranes accreted to Laurentia just before the collision with Gondwana. This stratigraphic variation of detrital zircon age signature suggests that the transition from a passive to an active margin in the Ouachita trough started, at the latest, in early Mississippian times. Results of this study is the first systematic study of the U-Pb detrital zircon signature of the Ouachita orogenic belt and have important implications in sediment dispersal, provenance interpretations, and paleogeography reconstructions in North America, especially in the southern mid-continent and surrounding areas.
GEOL2017WALKER20025 GEOL
Type: Undergraduate
Author(s):
Jessica Walker
Geological Sciences
Advisor(s):
Richard Denne
Geological Sciences
View PresentationThis study involved the examination of core samples from the Lower Cretaceous aged Kiamichi Formation of the East Texas Basin in order to interpret its organic and elemental geochemistry using various techniques. The Kiamichi Formation may have the potential to be a source rock for hydrocarbons, and may be a plausible target for oil and gas companies to produce using unconventional techniques. Since this formation has yet to be thoroughly analyzed, this project has lead to further understanding of its potential by using techniques such as handheld x-ray fluorescence tool to estimate for the abundance of rare earth elements and trace metals, as well as a CHNS analyzer to determine the amount of organic carbon of the formation. Upon completion of the sample analysis, this geochemical information about the Kiamichi Formation provides beneficial information for further research on the overall Kiamichi Seaway.
GEOL2017WILLIAMS23742 GEOL
Type: Graduate
Author(s):
John Williams
Geological Sciences
Advisor(s):
Helge Alsleben
Geological Sciences
View PresentationThe Eagle Ford Shale in south Texas is one of the most prolific unconventional hydrocarbon plays in the world (Breyer, 2016). In 2015, natural gas and oil from this field hit peak production numbers at 5,539 MMcf (million cubic feet) and 1,118,648 Bbl (barrels) per day, respectively (Texas RRC, 2016). In order for this low-permeability formation to produce, companies are using hydraulic fracturing, a stimulation treatment used in low-permeability rock whereby fluids are pumped at high pressures into reservoirs, causing new fractures to form and possibly reactivating existing fractures (Schlumberger, 2016). The aim of this study is to identify any geomechanical and geochemical properties that optimize fracture connectivity within the Boquillas Formation, the West Texas Eagle Ford equivalent. Energy-dispersive x-ray fluorescence (ED-XRF) and strength/hardness data from this study suggests that fracture frequency and length are affected by the clay and calcium carbonate content, and, by inference, the strength of the rock.
INTR2017BARONI49831 INTR
Type: Undergraduate
Author(s):
Nick Baroni
Interdisciplinary
Micah Eimerbrink
Psychology
Kelsey Paulhus
Biology
Julia Peterman
Psychology
Morgan Thompson
Biology
Jordon White
Psychology
Advisor(s):
Gary Boehm
Psychology
View PresentationInfluence of Isolation Stress on Aβ Production and Cognitive Function in 5xFAD mice Baroni, N. J.,1 Peterman, J. L.1, White, J. D.1, Eimerbrink, M. J.1, Paulhus, K. C.2, Thompson, M. A.2, Chumley, M. J.2 & Boehm G. W.1,
1Department of Psychology, Texas Christian University
2Department of Biology, Texas Christian University
Alzheimer's Disease (AD) is a devastating neurodegenerative disease that affects nearly 44 million people worldwide, and is increasing exponentially in prevalence. Thus, research into its causes and prevention is crucial. Transgenic mouse models of Alzheimer's disease are often used to better study AD pathology. These mice have genetic mutations that result in heightened production of amyloid beta (Aβ), a pathological hallmark of AD. It has been well established that stress can influence AD pathology. This study investigates how isolation stress influences the production of amyloid beta in 5xFAD transgenic mice. In addition, we investigated whether isolation stress impacts cognition in the contextual fear conditioning (CFC) paradigm. The mice were group-housed or isolated for both 2 and 3 months, followed by cognitive testing and tissue collection. Specifically, we utilized histochemistry to examine Aβ plaque counts and an ELISA to examine soluble Aβ production. We found that isolated 5xFAD+ mice had significantly more amyloid beta plaques than group-housed animals. 5xFAD+ mice isolated for 3 months also displayed a cognitive deficit in contextual fear conditioning. All together, our results support the research that isolation stress influences Aβ production and cognitive function, and extends that to the 5xFAD transgenic mice.
INTR2017CALCAGNO9574 INTR
Type: Undergraduate
Author(s):
Alexa Calcagno
Psychology
Philip Crain
Psychology
Micah Eimerbrink
Psychology
Amy Hardy
Biology
Kelsey Paulhus
Biology
Julia Peterman
Psychology
Morgan Thompson
Biology
Jordon White
Psychology
Advisor(s):
Gary Boehm
Psychology
Michael Chumley
Biology
View PresentationAlzheimer’s Disease (AD) is a neurodegenerative disease currently affecting about 5.5 million Americans, and the number of people affected may rise as high as 16 million by 2050. Characteristic AD pathology of deteriorating cognitive function is correlated with neurofibrillary tangles of tau protein and Amyloid-beta (Aβ) plaques. Aβ is a peptide resulting from cleavage of the Amyloid Precursor Protein (APP) primarily present within neuronal cell membranes. The Aβ peptide can be cleaved at different lengths, but Aβ1-42 is the most neurotoxic. Aβ1-42 primarily aggregates in the hippocampus, where it further stimulates the release of cytokine proteins initiating an inflammatory response. Previous studies in our lab have shown that short-term inflammation induced by injection of lipopolysaccharide (LPS) leads to an inflammatory response that stimulates production of Aβ1-42 peptides. The goal of this project was to determine whether this effect could be exacerbated through a second injection series of LPS after a fourteen-day recovery interval, thus modeling multiple, independent, bacterial infections, like that seen in humans. The animals were given 7 days of 250 mg/kg LPS or saline injections, a two-week break, and another 7 days of LPS or saline. Contrary to what was predicted, Aβ levels were not potentiated. This effect was found to be related to decreased inflammatory response upon secondary administration of LPS, as IL-1β mRNA was significantly lower in the group that got two rounds of LPS. Current studies of our lab are evaluating whether these results are related to the presence of antibodies to LPS or a specific tolerance mechanism.
INTR2017NGUYEN65117 INTR
Type: Undergraduate
Author(s):
Quang Nguyen
Computer Science
Advisor(s):
Sue Gong
Physics & Astronomy
Liran Ma
Computer Science
View PresentationThe challenge of taking care of aged patients who lost control of their bladders and bowel movements is to respond to the patients’ needs in a timely manner, which often requires a caretaker (e.g. a family member or a hired assistant) to stay on watch 24/7. In light of advance in cloud computing, we present a real-time low-cost monitoring and notification system that can continuously monitor the patients bedding condition, detect the conditions that help is needed and notify the care-takers. The system consists of TI SensorTags, Raspberry Pis, and IBM Bluemix. The TI SensorTag is a sensing device, while Raspberry Pi acts as a messenger receiving data collected by TI SensorTags via Bluetooth technology and transmitting the data to Bluemix, a cloud-based platform developed by IBM, via WiFi.
The system frequently senses bedding conditions of patients. Data is uploaded to a server residing on IBM Cloud, which processes data and sends appropriate notifications. The availability of cloud technology and small signal processing units, as well as advance in sensor technologies, allow us to build a low-cost system that can help caregivers address the patients’ needs effectively. As a result, the quality of care for patients is improved.
MATH2017HELLERMAN41492 MATH
Type: Graduate
Author(s):
Nathanael Hellerman
Mathematics
Advisor(s):
Efton Park
Mathematics
View PresentationThe winding number of a continuous function on the unit circle counts how many times a graph of the function loops around the origin. It is homotopy invariant and has applications to several areas of Mathematics.
Toeplitz operators with continuous symbol are bounded linear operators on the Hardy Space involving multiplication by a continuous function. The index of such a Toeplitz operator is closely connected to the winding number of its symbol.
This connection is examined and then extended for Toeplitz operators with crossed product symbols.
MATH2017HOWELL42763 MATH
Type: Undergraduate
Author(s):
Jake Howell
Mathematics
Advisor(s):
Eric Hanson
Mathematics
View PresentationPersonality psychologists often apply clustering techniques on questionnaire data to model personality structure. Inspired by this work, we apply techniques from topological data analysis (TDA) to understand the structure of this data. The data comes from Cattell’s Sixteen Personality Factor Questionnaire (collected by Bell, Rose, & Damon in 1972). Subjects were 969 adult male volunteers divided into three age groups: 25 to 34, 35 to 54, and 55 to 82. We use persistent homology (a TDA tool) to cluster the data and identify that personality structure is slightly different between the age groups. It is also curious to note that data from the youngest age group appears to have a topological “hole”, which raises questions of the psychological significance. This work suggests that additional research, including applying TDA tools to other questionnaire data sets can provide insights to the study of personality.
MATH2017SMITH36813 MATH
Type: Graduate
Author(s):
Jeremy Smith
Mathematics
Advisor(s):
George Gilbert
Mathematics
View PresentationAn algebraic integer is a complex number that is a root of a monic polynomial with integer coefficients. It is well-known that there is not always a single algebraic integer that can generate the ring of algebraic integers contained in a field extension of the rational numbers. The index of an algebraic integer is a natural number that measures how far a ring of integers is from having such a "primitive element." We investigate these indices in cubic fields and determine which natural numbers occur as indices in given families.
NTDT2017LANE60408 NTDT
Type: Undergraduate
Author(s):
Samantha Lane
Nutritional Sciences
Sarah Timmer
Nutritional Sciences
Advisor(s):
Rebecca Dority
Nutritional Sciences
View PresentationBackground: There have been many food waste studies done in elementary schools around the country. Several studies have determined that main entrées contribute significantly to plate waste in elementary school food programs, but studies relating the use of condiments and their influence on food waste need further exploration.
Objectives: Determine the correlation between the addition of condiments and the amount of plate waste from a chicken entrée.
Methods: In Phase I, data was collected in an elementary afterschool meal program. Researchers evaluated plate waste for the chicken entrée once a week for a total of four weeks. Chicken entrée plate waste was evaluated by weight and visual assessment. The waste weight was compared to the weight of one serving of the chicken entrée. A photograph of the total plate waste was taken each week for visual comparison. Researchers compared the total number of servings prepared to the number of servings leftover. In Phase II of the study a condiment (ketchup) was added to the menu when the chicken entrée was served. A marketing campaign was implemented with flyers to advertise the addition of the condiment. For the remaining four weeks, plate waste was documented using the same methods utilized during Phase I.
Results: In Phase I, an average of 26.7% of chicken entrées was wasted. In Phase II, an average of 20.8% of chicken entrées was wasted. No statistically significant difference was found in the percentage of food leftover between Phase I and Phase II (p<0.06). After adjusting for differences in initial portion size, there was still no statistically significant difference in weight of entrée left over (p<0.3).
Conclusion: Though there was no significant difference, the amount of waste is large enough to draw attention to the problem of waste in school foodservice. More research is necessary to determine what factors are leading to food waste.
PHYS2017CIAMPA7324 PHYS
Type: Graduate
Author(s):
Drew Ciampa
Physics & Astronomy
Advisor(s):
Kat Barger
Physics & Astronomy
View PresentationLocated inside the Large Magellanic Cloud, fierce explosions called supernovae have thrown out massive amounts of gas in every direction. A portion of this gas is aimed toward the Milky Way and is on a crash course with our galaxy. We are observing this gas with the Wisconsin H-Alpha Mapper, which provides a window into how the gas is distributed. These observations show two periods of supernovae explosions that created two distinct gas winds. One of these winds is currently active while the other was produced roughly 300 Million years old. Studying these gas clouds will provide information on how massive these winds are and the rate at which they are produced. The ejected gas is headed toward the Milky Way could supply our galaxy with additional gas to form stars in the future.
PHYS2017HASAN32286 PHYS
Type: Graduate
Author(s):
Md Tanvir Hasan
Physics & Astronomy
Roberto Gonzalez-Rodriguez
Chemistry & Biochemistry
Anton Naumov
Physics & Astronomy
Conor Ryan
Physics & Astronomy
Brian Senger
Physics & Astronomy
Advisor(s):
Anton Naumov
Physics & Astronomy
(Presentation is private)Graphene oxide (GO) inherits high transparency, substantial conductivity, high tensile strength from its parent materials graphene. Apart from these properties, it emits fluorescence which makes it a potential material to use in optoelectronics and bio-sensing applications. In this work, we have utilized systematic ozone treatment to alter the optical band gap of single-layered graphene oxide in aqueous suspensions. Due to controlled ozonation, additional functionalization takes place in GO graphitic sheet which changes GO electronic structure. This is confirmed by the increase in vibrational transitions of a number of oxygen-containing functional groups with treatment and the appearance of the prominent carboxylic group feature at c.a. 1700 1/cm. Albeit, timed ozone induction introduces only slight change in color and absorption spectra of GO samples, the emission spectra show a gradual increase in intensity with a significant blue shift up to 100 nm from deep red to green. This large blue shift suggests an increase in optical band gap with additional functionalization introduced by ozone treatment. We utilize a semi-empirical theoretical approach to describe the effects of functionalization-induced changes. This model attributes the origins of fluorescence emission to the quantum confined sp² carbon islands in GO encircled by the functional groups. As we decrease the graphitic carbon cluster size on the GO sheet, the optical bandgap calculated via HyperChem molecular modeling increases, which supports the experimentally observed blue shifts in emission. This theoretical result is further supported by the TEM measurement of ozone-treated samples, which shows a decreasing trend of average ordered graphitic carbon cluster size on GO sheets with treatment time. Theoretical modeling, as well as the experimental results, indicate that the optical bandgap and emission intensity of GO are alterable with controlled ozone treatment, which allows tailoring the optical properties of GO for specific applications in optoelectronics and bio-sensing.
PHYS2017MELENDEZ16706 PHYS
Type: Graduate
Author(s):
Matthew Melendez
Physics & Astronomy
John Donor
Physics & Astronomy
Peter Frinchaboy
Physics & Astronomy
Julia O'Connell
Physics & Astronomy
Advisor(s):
Peter Frinchaboy
Physics & Astronomy
View PresentationThe Open Cluster Chemical Abundances and Mapping (OCCAM) survey is a systematic survey of Galactic open clusters using data primarily from the SDSS-III/APOGEE-1 survey. However, neutron capture elements are limited in the IR region covered by APOGEE. In an effort to fully study detailed Galactic chemical evolution, we are conducting a high resolution (R~60,000) spectroscopic abundance analysis of neutron capture elements for OCCAM clusters in the optical regime to complement the APOGEE results. As part of this effort, we present Ba II, La II, Ce II and Eu II results for a few open clusters without previous abundance measurements using data obtained at McDonald Observatory with the 2.1 m Otto Struve telescope and Sandiford Echelle Spectrograph.
PHYS2017RAY20657 PHYS
Type: Graduate
Author(s):
Amy Ray
Physics & Astronomy
Angelle Tanner
Physics & Astronomy
Advisor(s):
Peter Frinchaboy
Physics & Astronomy
View PresentationThe goal of this study was to conduct a survey of 913 M-dwarf stars from the Lepine and Shara Proper Motion(LSPM) catalog within 33 parsecs. This research was conducted to improve upon the statistics of nearby multiple M-dwarf star systems. Identifying and confirming multiple systems at both wide and small separations will expand understanding of M-dwarf formation by comparing these results to existing star formation models. Data for these targets was collected with the Robo-AO camera on the Palomar 60in telescope. Separation and position angles were determined and compared for two epochs of the images containing multiple stars, one taken in 2012 and the other taken in 2014, to look for changes in these values. Stars with little change in position with respect to one another suggest they are common proper motion pairs. The Washington Double Star(WDS) catalog and other resources were used to further determine binarity. There were 50 multiple star system candidates found with a multiplicity fraction of 28.6±3.0 and a companion star fraction of 34.7±2.1.
PHYS2017SUN7458 PHYS
Type: Graduate
Author(s):
Jing Sun
Physics & Astronomy
Advisor(s):
Kat Barger
Physics & Astronomy
View PresentationA galaxy environment influences its internal properties. All galaxies start out small and grow bigger after merging with other galaxies. We are conducting a statistical study on isolated and interacting galaxies to determine how their environment impacts on their star-formation ability. We are using observations from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, which has already observed more than 3000 galaxies. We are examining the differences and similarities of the gas and stars in isolated and interacting galaxies to explore their past and current star formation activity. From these comparisons, we will identify which conditions promote and hinder star formation to learn how different types of galaxies evolved. An example of an isolated galaxy is shown here.
PSYC2017BARTH57901 PSYC
Type: Undergraduate
Author(s):
Dylan Barth
Psychology
Catherine M. Urbano
Psychology
Advisor(s):
Brenton Cooper
Psychology
View PresentationBirdsong, like human speech, is a vocal behavior that requires birds to precisely coordinate the activation of respiratory and vocal organ motor systems in order to generate sufficient subsyringeal air pressure for phonation. In both juvenile and adult songbirds, ablation or inactivation of HVC (proper name) neural activity disrupts temporal features of song. Consistent with the role of respiration in controlling song tempo, we have previously demonstrated that HVC contributes to song respiratory features in adult male Bengalese finches (Lonchura striata domestica, Urbano & Cooper, 2015). Here we further explored these findings by recording subsyringeal air sac pressure in singing birds prior to, during, and following recovery from HVC inactivation. Dialysis probes were implanted into either left or right HVC in adult male Bengalese finches (N=5), allowing for reversible suppression of neural activity (muscimol, 1.5 mg/mL, 1.125mg/mL, 0.75 mg/mL, 0.375 mg/mL). In all animals, mean air sac pressure and initial (10 ms) slope of song-related expiratory pulses (EPs) dropped significantly during HVC inactivation and recovered (Amplitude: F(2,8) = 12.8, p = 0.003; Slope: F(2,8) = 15.3, p = 0.002). We observed that, independent of the drug concentration, peak song EP amplitude exhibited a similar pattern of non-linear recovery over time while muscimol remained in the dialysis probe and continued to diffuse into HVC. In a subset of the data, we used an already established measure of efficacy (Beggs & Dobrovolny 2015) to model the change in peak song EP amplitude during HVC inactivation and we were able to produce consistent estimates for the variables in our model. We then ran a Monte Carlo simulation and parameter stability analysis to determine that the chosen model is robust and truth-conducive in predicting future values for peak EP amplitude under continued diffusion of muscimol into the tissue. We tested this model against simpler models to rule out alternative explanations. These results suggest that prolonged exposure to muscimol (4-6 h) induces mechanisms that reduce the efficacy of muscimol and result in gradual recovery of peak song EP amplitude.
PSYC2017CAYWOOD7847 PSYC
Type: Undergraduate
Author(s):
Megan Caywood
Psychology
Advisor(s):
Cathy Cox
Psychology
View PresentationAbstract: Problem: Although the current political landscape is divisive, some politicians have adopted the strategy of delivering the message of hope in their speeches. For instance, conservatives are striving to make America great again, implying a temporal return to some idyllic moment in American history. Conversely, liberals are more focused on moving forward by echoing the appeals of change to be a better country in the future. The current study was interested in whether these thematic differences in speech could influence nostalgic thinking, predict candidate support for both real and fake political candidates, whether it would matter if it was a liberal or conservative was giving the speech, and whether political nostalgia would interact with frame of reference and speech type to predict candidate support for the current election. Method: Participants consisted of both undergraduate students as well as Amazon’s Mechanical Turk (mTurk) workers. Persons completed individual difference measures such as self-compassion, nostalgia proneness, national nostalgia, religious fundamentalism, and social dominance. Participants then received a speech excerpt from a fake gubernatorial candidate in the upcoming election who was either a Democrat or Republican. The speech itself was either past or future oriented in language style. Individuals then rated their state nostalgia, support for the fake candidate, filled out some additional political questions, and then indicated their support for both Donald Trump and Hillary Clinton. Data analysis plan: Data will be analyzed using moderated regression in SPSS to look at potential interactions between political reference, speech, nostalgia, and one’s political party on candidate support. Differences between the fake candidate and real candidates are expected in the same direction. Interestingly, preliminary analyses of the results are demonstrating that Republican participants express greater feelings of nostalgia in response to a past-orientated speech from a Republican candidate; whereas, Democrats experience more nostalgia in response to a future-orientated Republican candidate’s speech. Conclusion: It is hypothesized that past oriented speeches will be capable of producing increases in nostalgic thinking. These predicted results would be the first to demonstrate the interaction between political preferences and nostalgic thinking. Additionally, if nostalgic thought is more tied to conservative support and future oriented speeches are linked with liberal support, this would importantly demonstrate that liberals and conservatives rely on different temporal modes of thinking about America values. These findings would be important for future political campaigns and by elucidating the different psychological strategies that can be utilized to motive candidate support among liberals and conservatives respectively.
PSYC2017COOKSEY27481 PSYC
Type: Undergraduate
Author(s):
Meg Cooksey
Psychology
Gary Boehm
Psychology
Michael Chumley
Biology
Brenton Cooper
Psychology
Julia Peterman
Psychology
James Taylor
Psychology
Catherine M Urbano
Psychology
Jordon White
Psychology
Advisor(s):
Michael Chumley
Biology
View PresentationAlzheimer’s Disease (AD) is a progressive neurodegenerative disease associated with memory loss and cognitive decline (Borlikova et al., 2013). AD is marked by the accumulation of amyloid-beta (A) protein deposits throughout the brain (Miklossy, 2008). The presence of soluble A oligomers alters synaptic formations and implicates cognitive dysfunction (Cleary et al., 2005). Furthermore, established research indicates intracerebroventricular (ICV) injections of human A potentiate cognitive deficits associated with learning and memory retrieval. (Amini et al., 2015; Borlikova et al., 2013; Freir et al., 2011). While the importance of synaptic formations in the learning process has been affirmed in existing literature, the specific phases of learning affected by human and murine A infusions is not fully understood. Here we sought to explore how A oligomer infusions impact associative learning at different points of time. Using a contextual fear-conditioning (CFC) paradigm, two experiments were carried out to disentangle which phase of learning, consolidation and/or retrieval is impacted in the presence of A oligomers. In Experiment 1, animals received an injection of A or sterile saline immediately after training and were tested 48 hours later. Results indicate that A infusions immediately after training resulted in decreased freezing behavior, indicating that A disrupted the consolidation and/or retrieval of the context shock pairing. In Experiment 2, animals were trained in CFC and received injections of A or sterile saline 46 hours later. Two hours following infusions, freezing was assessed. Results from Experiment 2 revealed that A infusions 46 hours post-training had no impact on freezing behavior. Together these results indicate that A is disrupting the consolidation of new memories and is not impacting the recovery of previously consolidated information.
PSYC2017CORRIGAN47263 PSYC
Type: Undergraduate
Author(s):
Emily Corrigan
Psychology
Advisor(s):
Sarah Hill
Psychology
View PresentationLife history theory predicts that exposure to extrinsic mortality threats early in life leads to a faster life history strategy characterized by preference for present versus future outcomes. The condition of one's body also determines the probability of survival. With this in mind, we predicted that a marker of damage to one's body, levels of the proinflammatory cytokine IL-1β, would also promote preference for present over delayed outcomes.
We found that levels of serum IL-1β predicted more reported impulsivity, less preference for delaying gratification, and a more present temporal orientation. Additonal analyses suggest that environmental stress may partially exert its effect on temporal focus through somatic damage.
PSYC2017DAMBRA24061 PSYC
Type: Undergraduate
Author(s):
Gabriella D'Ambra
Psychology
Advisor(s):
Cathy Cox
Psychology
View PresentationFrom the perspective of Terror Management Theory (TMT), humans hold the potential to experience paralyzing terror due to the understanding of our eventual death. This terror results from the effort to reconcile death awareness and the evolutionary struggle to survive. While TMT research has accumulated many significant findings since its origination, basic assumptions of this theory have recently been challenged. Some critics are pointed out that there is no direct evidence for the experience of “terror” within the TMT literature (Marten & van den Bos ,2014) as mortality salience (MS) effects have been largely observed through the use of self-reported questionnaires and a terror after MS manipulation is mostly inferred. The current study attempts to address these concerns by seeking to obtain the confirmation of unconscious terror to mortality salience measured via salivary cortisol response.
PSYC2017DUBOIS49347 PSYC
Type: Undergraduate
Author(s):
Jamie DuBois
Psychology
Brenton G. Cooper
Psychology
Courtney Favoloro
Psychology
Emily A. Spradley
Psychology
Catherine M. Urbano
Psychology
Advisor(s):
Brenton G. Cooper
Psychology
View PresentationSongbirds are an appealing animal model for speech acquisition partially due to the fact that they are also vocal learners, meaning they acquire their vocalizations through imitation (Doupe & Kuhl, 1999). Birdsong is defined as a "chain of discrete acoustic elements arranged in a particular temporal order" (Berwick et al. 2011). While Bengalese finches (Lonchura striata domestica) have a repertoire of 8-12 syllables (i.e. acoustic elements), the sequence of these syllables can vary according to set patterns and rules. Song sequence stereotypy, linearity and consistency are measures of syntax. The Bengalese finch song is semi-variable. Some syllable-to-syllable combinations are fixed, whereas some syllables (hereafter, “branching syllables) can be followed by multiple syllables (hereafter, “branching points”). In the avian brain, two different neural pathways are responsible for song acquisition and production, and both pathways are controlled by the avian premotor nucleus, HVC (proper name). Previously, we have found that male Bengalese finches show initial acoustic impairment and gradual recovery over the course of seven days after small, unilateral HVC microlesions (right hemisphere = 4, left hemisphere = 4). Here we explore whether HVC contributes to maintaining and recovering song syntax, as well as potential differential effects of lefts versus right HVC microlesions. To answer these two questions, we analyzed the syntax of previously collected songs at three different time points: baseline (pre-surgery), post-surgery day 4 (PSD4), and post-surgery day 7(PSD7). Each syllable was assigned a unique label, however, due to the extent of song degradation at PSD4, we did could not “match” syllables across days. Using an online java applet, the Songinator (Zevin, Seidenberg & Bottjer, 2004), we computed scores for stereotypy, linearity and consistency. Using a 2 x 3 repeated-measures ANOVA, we did not find any significant differences across time points for stereotypy (F(1.09, 6.53) = 0.18, p = 0.40), linearity (F(2,12) = 0.94, p = 0.42), or consistency (F(2, 12) = 0.63, p = 0.55). We also did not find an interaction effect for stereotypy (F(1.09, 6.53) = 0.84, p = 0.41), linearity (F(2, 12) = 1.25, p = 0.32), or consistency (F(2, 12) = 0.27, p = 0.77). However, we observed that right HVC microlesions exhibited increased linearity over time (Pre: 0.29 ± 0.02, PSD4: 0.31 ± 0.02, PSD7: 0.34 ± 0.01) . We examined this finding in more detail by computing the a change ratio (PSD4/pre-surgery) for the number of syllables and the average number of branching points per syllable. We found that HVC damage increased the number of unique syllables in both groups. Interestingly, there was also an increase in the number of branching points, but only in the left HVC group, compared to the right HVC microlesion (t(6) = 1.853, p = 0.057, one-tailed). These results support previous findings that HVC lesions disrupt vocal production and suggest novel syllables are the result of impaired motor control. These results also suggest that control of song syntax is somewhat lateralized. Left HVC microlesions initially impair the birds’ ability to produce a stereotyped song by making syllable transitions more variable. Therefore, the right HVC controls song variability, and left HVC song stereotypy.
PSYC2017FRENCH39746 PSYC
Type: Undergraduate
Author(s):
Katherine French
Psychology
Advisor(s):
Cathy Cox
Psychology
View PresentationTerror management theory suggests that when mortality concerns are salient, religion can serve as a defense in an attempt to boost self-esteem and shield against the potential for anxiety. Interestingly, however, very little research has been conducted on people who actively question their religious beliefs in order to attain a better understanding (i.e., quest religiosity). Recent research suggests that quest religiosity moderated the effects of mortality salience in that participants who were high in quest religiosity experienced a decrease in self-esteem following reminders of death. Building on these findings, the current studies further examined quest religiosity to extend to underlying death cognitions and fear of death. Study 1 found that individuals who were high in quest religiosity experienced a greater accessibility of death-related thoughts. Additionally, Study 2 demonstrated that quest religiosity fully mediated the relationship between fear of death and well-being among religious individuals. Specifically, high fear of death predicted greater quest religiosity that, in turn, predicted lower well-being. These results suggest an associative link between fear of death and quest. Importantly, religion can serve as a buffer for existential terror but questioning these beliefs lowers their efficacy and impacts well-being.
PSYC2017HOFFMAN37493 PSYC
Type: Undergraduate
Author(s):
Jill Hoffman
Psychology
Emily Brown
Psychology
Cathy Cox
Psychology
Gabriella D'Ambra
Psychology
Katherine French
Psychology
Mike Kersten
Psychology
Paulina Mozo
Psychology
Advisor(s):
Cathy Cox
Psychology
View PresentationPrevious research suggests that individuals pursue close relationships because they help people cope with mortality awareness (Mikulincer, Florian, & Hirschberger, 2003). Further, there is some evidence to suggest that individuals achieve a sense of death transcendence through the prospect of parenthood. For example, following reminders of death, people have a greater desire for children (e.g., Wisman & Goldenberg, 2005), have more vivid and accessible parenthood-related cognitions (Yaakobi, Mikulincer, & Shaver, 2014), and are more negative toward strict birth-control policies and more positive toward younger family members (Zhou, Liu, Chen, & Yu, 2008). However, no prior work has examined parenting behaviors directly. For this reason, the purpose of the present research was to examine whether people display more behaviors associated with responsive caregiving following reminders of mortality. Participants were exposed to a mortality salience manipulation in which they were randomly assigned to complete items relating to their fear of death or public speaking (the control condition). Following this, everyone took part in a simulated baby paradigm to assess participants’ responses to a simulated infant doll that was programmed (wirelessly) to begin crying inconsolably (Rutherford, Goldberg, Luyten, Bridgett, & Mayes, 2013). The extent to which participants engaged in caregiver-based touching behaviors (i.e., holding the baby in a meaningful way in an attempt to calm or soothe the baby) toward the simulated crying infant served as the dependent variable. The results revealed that, in comparison to the control condition, reminders of death led participants to engage in a greater degree of caregiver-based touching behaviors while interacting with a simulated crying infant. Overall, these initial findings suggest that reminders of death influence actual caregiving behaviors and suggest that people may display more optimal parenting behavior in the real world when thoughts of death are salient.
PSYC2017JOHNSON707 PSYC
Type: Undergraduate
Author(s):
Patricia Johnson
Psychology
Advisor(s):
Naomi Ekas
Psychology
View PresentationBackground: There is significant variation in toddlers’ abilities to suppress dominant responses and perform subdominant responses, an aspect of temperament known as effortful control. Effortful control emerges relatively late in infancy, beginning around 12 months of age and surging around 24 months of age. This late pattern of development allows for earlier-developing factors to influence the development of effortful control, like the parent-infant attachment relationship and other temperamental constructs. While the importance of the parent-infant attachment relationship is widely supported by research, one noteworthy limitation of this body of work is the underwhelming amount of research on the father-infant attachment relationship (Hoffman, 2000; Lounds, Borkowski, Whitman, Maxwell, & Weed, 2005). Evidence suggests that father-child interactions provide children with unique experiences that may not occur with their mothers (Grossmann, et al., 2002). For this reason, the current study examines both parent-infant attachment relationships. Previous research has also shown that one aspect of temperament can moderate the expression of other aspects of temperament (Gartstein & Rothbart, 2003; Kochanska, 1993; Rothbart, Ahadi, & Evans, 2000). With each dimension of temperament emerging at different times, it is important to understand which temperamental constructs predict a greater capacity for effortful control.
Objective: The purpose of this study was to examine whether secure mother-infant and father-infant attachment relationships at 12 months predicted high levels of effortful control at 3 years of age. A second line of interest was to examine whether infant levels of negative affectivity and surgency/extraversion at 6 months predicted high levels of effortful control at 3 years of age.
Methods: 33 toddlers (age in years, M = 3.16) and their parents (32 mothers; 32 fathers) participated in the current study. Parents completed the Infant Behavior Questionnaire (IBQ), a parent-report measure of infant temperament, when the infant was 6 months old. Mothers and infants returned to the laboratory when the infant was 12 months old and participated in the strange situation procedure, a measure of parent-infant attachment. Fathers and infants returned to the laboratory when the infant was 13 months old and completed the same strange situation procedure. When the child reached 3 years of age, mother, father, and child returned to the laboratory and completed a battery of tasks measuring effortful control.
Results: The relationship between effortful control and parent-infant attachment was investigated using a Pearson product-moment correlation coefficient. Preliminary analyses were preformed to ensure no violation of the assumptions of normality, linearity, and homoscedascity. Attachment was investigated using infant attachment behaviors measured in the strange situation procedure. There was a moderate, positive correlation between infant resistant behaviors (M = 2.33, SE = .272) with dad and effortful control scores (M = .105, SE = .065), r = .310, n = 30, p = .048, with high resistance behaviors associated with higher levels of effortful control. Additionally, there was a moderate, negative correlation between infant contact maintenance behaviors (M = 1.34, SE = .151) with mom and effortful control scores, r = -.338, n = 30, p = .034, with high contact maintenance associated with lower levels of effortful control. The relationship between effortful control and temperament was investigated using Pearson product-moment correlation coefficient. Preliminary analyses were performed to ensure no violation of the assumptions of normality, linearity, and homoscedasticity. Temperament was investigated using parental reports on the Infant Behavior Questionnaire. There was a moderate, positive correlation between the low pleasure dimension (M =5.50, SE = .152) of temperament and effortful control (M = .105, SE = .065), r = .354, n = 31, p = .025, with high scores in low pleasure associated with higher scores of effortful control.
Conclusion: These results suggest that the father-infant attachment relationship is unique from the mother-infant attachment relationship, as different interaction behaviors with mom and dad are associated with effortful control. Interestingly, infant resistant behaviors with dad at 12 months are associated with higher levels of effortful control. Secondly, infant contact maintenance behaviors with mom are associated with lower levels of effortful control. These results could be explained by the fact that these interaction behaviors displayed by an infant exist on a continuum. It could be argued that children who exhibit high levels of resistant behavior towards mom are also able to resist a dominant response and initiate a subdominant response easily, indicating high level of effortful control. Similarly, while some contact maintenance is a component of secure attachment, too much contact maintenance could indicate an insecure attachment relationship, as the child could be too dependent on their parents and fail to explore the environment.
PSYC2017JONES56715 PSYC
Type: Undergraduate
Author(s):
Nicholas Jones
Psychology
Advisor(s):
Charles Lord
Psychology
View PresentationContext effects within attitude research are well documented; however, recent developments in evolutionary psychology (e.g., fundamental motives framework) offer new possibilities for the study of attitudes. The Fundamental Motives Framework states that we have motives which reflect evolutionary goal relevant to survival and reproduction, and these motives weave their way through human life, guiding behavior to satisfy goals. These motives interact with behavior in several ways, but research remains to be done in certain areas. In two studies, we examined how fundamental motives interact with women’s attitudes of potential (male) partners. In two studies, we examined two separate fundamental motives and a number of attitude items. We predicted in Study 1 that women would have more positive attitude toward a cold, but competent man when primed with resource scarcity (as compared to a control. In Study 2, we predicted that women would have a more positive attitude toward a cold but dominant man when primed with disease threat. In both studies, we found that women’s attitudes toward our two “real” men were affected by fundamental motives. In Study 1, women expressed less of a preference of the warm over the cold (but competent) man when primed with resource scarcity, and in Study 2 women expressed less of a preference of the warm over the cold (but dominant) man when primed with resource scarcity. We discuss potential mediators, though found no evidence to support a mediator at this time.