Matching Items (22)
Description
The purpose of this study was to provide a foundation for a plan for evaluations of the impact of the Learning Center on elementary school children with respect to academic achievement and school-related behaviors. Exploratory pre- and posttest data were collected and analyzed and recommendations were provided for a broader evaluation plan to be used in the future. The experience from the exploratory evaluation, limitations and the recommendations in this study can be used by Chicanos Por La Causa to strengthen the Learning Center and thereby optimize the benefit to the children served within the San Marina residential community.
ContributorsLodhi, Osman Sultan (Author) / Roosa, Mark (Thesis director) / Dumka, Larry (Committee member) / Perez, Norma (Committee member) / Barrett, The Honors College (Contributor) / Department of Chemistry and Biochemistry (Contributor) / Department of Psychology (Contributor)
Created2014-05
Description
Cocaine is a highly addictive psychostimulant that is widely used around the world. It is far more cost effective to curb this problem through treatment than by any other method as medicinal drug treatment is 15 times more effective than law enforcement at reducing the societal costs of cocaine use as determine by RAND corp. In a previous paper from our lab, it was found that via virally mediated introduction of additional 5-HT1B receptors into the nucleus accumbens there was a leftward shift in the cocaine intake dose-response curve in animals that were self-administering cocaine by pressing a lever. These findings suggest that 5-HT1B receptor action enhances the reinforcing effects of cocaine. However, when animals were given a 21-day period of prolonged abstinence and then tested for cocaine intake, it was determined that 5-HT1B receptor action had the opposite effect of decreasing cocaine intake presumably due to a decrease in the reinforcing effects of cocaine: [16]. The experiment in the current paper was devised to further test this finding via pharmacological means using the 5-HT1B agonist CP 94253 to increase stimulation of 5-HT1B receptors. Animals were trained to self-administer by pressing a lever on fixed ratio schedules of cocaine reinforcement given at 0.75 mg/kg and 0.075 mg/kg doses of cocaine. These doses allowed us to examine changes in self-administration on both the ascending and descending limbs of the inverted u-shaped cocaine dose-effect curve. Our results indicated that in animals given CP 94253 exhibited a decrease in responding on both the ascending and descending limbs of the dose response curve demonstrating a downward shift after prolonged abstinence. These exciting results suggest that the agonist decreases cocaine intake, and therefore, the agonist may be a useful treatment for cocaine dependence.
ContributorsYanamandra, Krishna Teja (Author) / Neisewander, Janet (Thesis director) / Goldstein, Elliott (Committee member) / Pentkowski, Nathan (Committee member) / Barrett, The Honors College (Contributor)
Created2013-05
Description
Temnothorax ants are a model species for studying collective decision-making. When presented with multiple nest sites, they are able to collectively select the best one and move the colony there. When a scout encounters a nest site, she will spend some time exploring it. In theory she should explore the site for long enough to determine both its quality and an estimate of the number of ants there. This ensures that she selects a good nest site and that there are enough scouts who know about the new nest site to aid her in relocating the colony. It also helps to ensure that the colony reaches a consensus rather than dividing between nest sites. When a nest site reaches a certain threshold of ants, a quorum has been reached and the colony is committed to that nest site. If a scout visits a good nest site where a quorum has not been reached, she will lead a tandem run to bring another scout there so that they can learn the way and later aid in recruitment. At a site where a quorum has been reached, scouts will instead perform transports to carry ants and brood there from the old nest. One piece that is missing in all of this is the mechanism. How is a quorum sensed? One hypothesis is that the encounter rate (average number of encounters with nest mates per second) that an ant experiences at a nest site allows her to estimate the population at that site and determine whether a quorum has been reached. In this study, encounter rate and entrance time were both shown to play a role in whether an ant decided to lead a tandem run or perform a transport. Encounter rate was shown to have a significant impact on how much time an ant spent at a nest site before making her decision, and encounter rates significantly increased as migrations progressed. It was also shown to individual ants did not differ from each other in their encounter rates, visit lengths, or entrance times preceding their first transports or tandem runs, studied across four different migrations. Ants were found to spend longer on certain types of encounters, but excluding certain types of encounters from the encounter rate was not found to change the correlations that were observed. It was also found that as the colony performed more migrations, it became significantly faster at moving to the new nest.
ContributorsJohnson, Christal Marie (Author) / Pratt, Stephen (Thesis director) / Pavlic, Theodore (Committee member) / Shaffer, Zachary (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor)
Created2013-05
Description
Recent data suggests that olfactory input is important for antennal lobe development in honey bees. Chronic association of a single odor to food resources during crucial stages of development results in delayed antennal lobe development for mature foraging bees. The antennal lobes of these bees instead closely resemble an immature network observed in young, newly emerged bees. Using an odor stimuli variance assay, learning and memory tests can be used to explore how well honey bees discriminate single odors within complex odor mixtures. Here we are validating two different odor mixtures, a Brassica rapa floral blend and a second replicate mixture composed of common molecularly dissimilar odors. Odors in each mixture are either held constant or varied in concentration over 16 conditioning trials. Subsequent memory tests are performed two hours later to observe the ability of bees to distinguish and recognize specific odor components in each mixture. So far in our assay we find high rates of generalization for both odor mixtures. In general, more bees responded to all odors in the replicate treatment group over the Brassica treatment group. Additionally, bees in the Brassica treatment group did not respond to the target odor. More data is being collected to validate this assay. In future studies, I propose to apply this behavioral assay to bees with an altered olfactory developmental in order to see the functional impacts of this chronic odor association treatment.
ContributorsHalby, Rachael (Author) / Smith, Brian (Thesis director) / Jernigan, Christopher (Committee member) / School of Life Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
Social proof and mismatch of self-preference have been assumed to play an important role in the inference of value. They can be influential factors when it comes to decision-making in a mate-selection environment. In this thesis study, participants took an online survey in the form of a dating website. They answered a series of questions about the traits they would like to see in a potential mate. They were then presented with four potential mates and asked to rank them by their preferences. The results show that participants most preferred the potential mate with a high social proof and a low mismatch of self-preference and least preferred the potential mate with a low social proof and a high mismatch of self-preference. When comparing just social proof and mismatch of self-preference, there was not an interaction effect between the two. I conclude that even though social proof is a powerful influencing factor by itself, it did not have the power to trump the mismatch of self-preference.
ContributorsAkhter, Sumbal (Author) / Kwan, Virginia (Thesis director) / Knight, George (Committee member) / Cohen, Adam (Committee member) / Barrett, The Honors College (Contributor) / College of Liberal Arts and Sciences (Contributor)
Created2012-12
Description
This study examined the cross-sectional and longitudinal associations among diurnal cortisol rhythms and sleeping patterns in adolescents. 79 participants completed the study over three days during the spring semester of their senior year in high school, and 76 of these subjects participated again over three days during the fall semester of their freshman year in college. They completed daily saliva samples and diary entries, while wearing an actigraph to obtain objective measurements of sleep duration and efficiency. Cross-sectionally, longer sleep duration was associated with a lower cortisol awakening response, a smaller area under the cortisol curve, and a steeper cortisol slope. Longitudinally, there was no significant relationship between sleep duration and these cortisol parameters. Moreover, sleep efficiency was not associated with cortisol parameters cross-sectionally nor longitudinally. Results suggest associations between concurrent sleep duration and cortisol patterns, and may have significant impact on understanding adolescents' physiological response to stress.
ContributorsLathrop, Devon Olivia (Author) / Doane, Leah (Thesis director) / Orchinik, Miles (Committee member) / Zeiders, Katherine (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor)
Created2013-05
Description
The main purpose of this thesis was to further explore factors that render particular children more susceptible to bullying and peer victimization. Race, age, and the activities that the children participated in were considered potential predictors of bullying and victimization. Self- and peer-reported data were gathered on 437 first and third grade children (234 boys and 203 girls, M age = 7 years, 6 months), including the frequency of peer victimization and the extent of their engagement in gender-typed activities. Activities were identified as either masculine (e.g., watching sports on television, playing with tools) or feminine (e.g., playing house, cheerleading) according to which sex was mostly likely to engage in them. Mixed support was obtained for the hypothesis that boys are at greater risk for being targets of peer aggression. Specifically, while peer-reports of victimization supported this hypothesis, self-reports revealed no sex differences. Support was obtained for the hypotheses that engaging in cross gender-typed activities would be a stronger risk factor for peer victimization for boys than for girls.
ContributorsAboud, Lauren Ashley (Author) / Ladd, Becky (Thesis director) / Eggum, Natalie (Committee member) / Ladd, Gary (Committee member) / Barrett, The Honors College (Contributor) / Department of English (Contributor)
Created2013-05
Description
Mammalian olfaction relies on active sniffing, which both shapes and is shaped by olfactory stimuli. Habituation to repeated exposure of an olfactory stimuli is believed to be mediated by decreased sniffing; however, this decrease may be reserved by exposure to novel odorants. Because of this, it may be possible to use sniffing itself as a measure of novelty, and thus as a measure of odorant similarity. Thus, I investigated the use of sniffing to measure habituation, cross-habituation, and odorant similarity. During habituation experiments, increases in sniff rate seen in response to odorant presentation decreased in magnitude between the first and second presentations, suggesting of habituation. Some of this reduction in sniff rate increases was revered by the presentation of a novel odorant in cross-habituations. However the effect sizes in cross-habituation experiments were low, and the variability high, forestalling the conclusion that sniffing accurately measured cross-habituation. I discuss improvements to the experimental protocol that may allow for cross-habituation to be more accurately measured using sniffing alone in future experiments.
ContributorsVigayavel, Nirmal (Author) / Smith, Brian (Thesis director) / Sanabria, Federico (Committee member) / Gerkin, Rick (Committee member) / Barrett, The Honors College (Contributor)
Created2015-12
Description
As of 2018, 61% of all jobs in Arizona require additional training/education beyond the high school diploma. With only 35% of Arizona’s population holding a post-secondary degree, there is high demand and need for more Arizonans to complete degrees or certificates in the coming years. As the largest minority population in the state and one-third of the college-aged population, Latinx students are not successfully attaining these degrees. While Latinx degree attainment has increased, this increase was due primarily to higher rates of high school and degree completion of Latinas. Of those Latino males that continue to post-secondary education, the majority (71%) will enroll at the community college level. However, the road to academic success at community college is dim. Despite their high enrollment rates at community college, 13% will leave after their first year, 35.2% after their second, and 56.7% after six years (Urias & Wood, 2015).
Research on Latino males in higher education has been primarily focused on access, persistence, and retention at the university level. Further, research has been centered on identity, critical race theory, language behaviors, and engagement of Latino males in higher education. Little to no research has been done to identify the factors, characteristics, or the internal will that propels a Latino male community college student to complete their degree. This research is intended to contribute to this void in research, utilizing a human behavioral theoretical approach to address the phenomena of Latino male attrition.
This exploratory mixed method research approach incorporated both qualitative and quantitative instruments to test the validity of the Theory of Planned Behavior as a plausible model to assess intention of Latino males to graduate from community college. The research examined whether intention to graduate could be assessed on the behavioral beliefs associated with a Latino male’s attitude, perceived norms, and their perceived behavioral controls towards completing a degree. Further, the research sought to determine that if the theory could accurately assess intention, could the model assess differences in intention for first-year versus second-year students, and currently enrolled students versus those who have dropped out. The premise was that if the theory is an acceptable model to predict intention, the study could also model behavioral interventions to support Latino male student persistence and completion.
The results indicate that the Theory of Planned Behavior is an acceptable model to assess and predict behavioral beliefs that drive Latino male intention to graduate from community college. Latino male students’ attitudes toward degree attainment is the most significant factor in predicting their intention to graduate. Additionally, behavioral beliefs of enrolled students are significantly different than their peers who dropped out. However, there is no significant difference in the behavioral beliefs of students in their first-year of enrollment versus those in their second-year of enrollment.
Using the theory’s behavioral intervention implementation strategy, the research provided implications for practice that support Latino male student recruitment, retention, and completion measures for community colleges. Additionally, the research provides implications for future research that supports more studies on Latino male community college degree attainment, and for preparing more Latino men for the workforce needs of Arizona.
Research on Latino males in higher education has been primarily focused on access, persistence, and retention at the university level. Further, research has been centered on identity, critical race theory, language behaviors, and engagement of Latino males in higher education. Little to no research has been done to identify the factors, characteristics, or the internal will that propels a Latino male community college student to complete their degree. This research is intended to contribute to this void in research, utilizing a human behavioral theoretical approach to address the phenomena of Latino male attrition.
This exploratory mixed method research approach incorporated both qualitative and quantitative instruments to test the validity of the Theory of Planned Behavior as a plausible model to assess intention of Latino males to graduate from community college. The research examined whether intention to graduate could be assessed on the behavioral beliefs associated with a Latino male’s attitude, perceived norms, and their perceived behavioral controls towards completing a degree. Further, the research sought to determine that if the theory could accurately assess intention, could the model assess differences in intention for first-year versus second-year students, and currently enrolled students versus those who have dropped out. The premise was that if the theory is an acceptable model to predict intention, the study could also model behavioral interventions to support Latino male student persistence and completion.
The results indicate that the Theory of Planned Behavior is an acceptable model to assess and predict behavioral beliefs that drive Latino male intention to graduate from community college. Latino male students’ attitudes toward degree attainment is the most significant factor in predicting their intention to graduate. Additionally, behavioral beliefs of enrolled students are significantly different than their peers who dropped out. However, there is no significant difference in the behavioral beliefs of students in their first-year of enrollment versus those in their second-year of enrollment.
Using the theory’s behavioral intervention implementation strategy, the research provided implications for practice that support Latino male student recruitment, retention, and completion measures for community colleges. Additionally, the research provides implications for future research that supports more studies on Latino male community college degree attainment, and for preparing more Latino men for the workforce needs of Arizona.
ContributorsGanther, Felicia Lorraine (Author) / Knopf, Richard (Thesis advisor) / Gonzales, Steven (Committee member) / Denby-Brinson, Ramona (Committee member) / Larsen, Dale (Committee member) / Arizona State University (Publisher)
Created2020
Description
ABSTRACT
Adolescence is a period marked by significant physical, developmental, cognitive, and social changes, all of which contribute to health concerns for teens. A steady rise in life expectancy over the past two centuries is potentially diminishing due to the increase in prevalence, severity, and consequences of obesity in children and adolescents related to unhealthy lifestyle behaviors. Health behaviors are often established during childhood and adolescence that continue into adulthood. The development and integration of healthy lifestyle behaviors are vital through adolescence. Self-determination theory (SDT) offers a theoretical framework for attempting to understand individual differences in motivation and behavior. Recent studies have primarily focused on how adolescents make choices related to eating behaviors, physical activity, and self-care habits, and how the resultant behaviors are measured. Participants in this study were 63 healthy adolescents enrolled in 9th grade health class. All participants provided baseline data at Time 1 and again following the five-week pretest posttest intervention study at Time 2. This study examined the utility of SDT in the development of the Adolescent Intrinsic Motivation, a healthy lifestyle behavior intervention, using the tenets of SDT to explain healthy lifestyle motivational beliefs in adolescents, along with healthy lifestyle behaviors and knowledge. The AIM intervention study introduced basic health recommendations to adolescents in an autonomy-supportive environment, which has been shown to encourage the adolescent to make healthy behavior choices based on their own interest and enjoyment. Preliminary effects of the study indicated that participants receiving the AIM intervention demonstrated significant differences in motivational beliefs, healthy lifestyle knowledge, as well as healthy lifestyle behaviors from Time 1 (baseline) to Time 2 (post-intervention). Results of this study provide support for the use of SDT to address the competence, relatedness, and autonomy of adolescents in the development of health education material. Testing this intervention in a larger, random sampling of schools within the state, or even in more than one state, with a three- or six-month follow-up would be useful in determining the longer-term effects of the intervention.
Adolescence is a period marked by significant physical, developmental, cognitive, and social changes, all of which contribute to health concerns for teens. A steady rise in life expectancy over the past two centuries is potentially diminishing due to the increase in prevalence, severity, and consequences of obesity in children and adolescents related to unhealthy lifestyle behaviors. Health behaviors are often established during childhood and adolescence that continue into adulthood. The development and integration of healthy lifestyle behaviors are vital through adolescence. Self-determination theory (SDT) offers a theoretical framework for attempting to understand individual differences in motivation and behavior. Recent studies have primarily focused on how adolescents make choices related to eating behaviors, physical activity, and self-care habits, and how the resultant behaviors are measured. Participants in this study were 63 healthy adolescents enrolled in 9th grade health class. All participants provided baseline data at Time 1 and again following the five-week pretest posttest intervention study at Time 2. This study examined the utility of SDT in the development of the Adolescent Intrinsic Motivation, a healthy lifestyle behavior intervention, using the tenets of SDT to explain healthy lifestyle motivational beliefs in adolescents, along with healthy lifestyle behaviors and knowledge. The AIM intervention study introduced basic health recommendations to adolescents in an autonomy-supportive environment, which has been shown to encourage the adolescent to make healthy behavior choices based on their own interest and enjoyment. Preliminary effects of the study indicated that participants receiving the AIM intervention demonstrated significant differences in motivational beliefs, healthy lifestyle knowledge, as well as healthy lifestyle behaviors from Time 1 (baseline) to Time 2 (post-intervention). Results of this study provide support for the use of SDT to address the competence, relatedness, and autonomy of adolescents in the development of health education material. Testing this intervention in a larger, random sampling of schools within the state, or even in more than one state, with a three- or six-month follow-up would be useful in determining the longer-term effects of the intervention.
ContributorsRoland, Catherine (Author) / Jacobson, Diana (Thesis advisor) / Reifsnider, Elizabeth G. (Thesis advisor) / McClain, Darya (Committee member) / Arizona State University (Publisher)
Created2015