Matching Items (33)
Description
City managers and policy makers are increasing looking to environmental systems to provide beneficial services for urban systems. Constructed wetland systems (CWS), highly managed and designed wetland ecosystems, are being utilized to remove pollution, particularly excess nitrogen (N), from treated wastewater. Various wetland process remove N from effluent, such as denitrification, direct plant uptake, and soil accumulation. Emergent macrophytes provide direct uptake of N and improve conditions for microbially-mediated N processing. The role of different macrophytes species, however, is less understood and has primarily been examined in mesocosm and microcosm experiments and in mesic environments. I examined the effects of community composition on N removal and processing at the whole ecosystem scale in an aridland, constructed wetland (42 ha) through: 1) quantifying above- and belowground biomass and community composition from July 2011 \u2014 November 2012 using a non-destructive allometric technique, and; 2) quantifying macrophyte N content and direct macrophyte N uptake over the 2012 growing season. Average peak biomass in July 2011 & 2012 was 2,930 g dw/m2 and 2,340 g dw/m2, respectively. Typha spp. (Typha domingensis and Typha latifolia) comprised the majority (approximately 2/3) of live aboveground biomass throughout the sampling period. No statistically significant differences were observed in macrophyte N content among the six species present, with an overall average of 1.68% N in aboveground tissues and 1.29% N in belowground tissues. Per unit area of wetland, Typha spp. retained the most N (22 g/m2); total N retained by all species was 34 g/m2. System-wide direct plant N uptake was markedly lower than N input to the system and thus represented a small portion of system N processing. Soil accumulation of N also played a minor role, leaving denitrification as the likely process responsible for the majority of system N processing. Based on a literature review, macrophyte species composition likely influences denitrification through oxygen diffusion into soils and through the quality and quantity of carbon in leaf litter. While this study and the literature indicates Typha spp. may be the best species to promote wetland N processing, other considerations (e.g., bird habitat) and conditions (e.g., type of wastewater being treated) likely make mixed stands of macrophytes preferable in many applications. Additionally, this study demonstrated the importance of urban wetlands as scientific laboratories for scientists of all ages and as excellent stepping-off points for experiments of science-policy discourse.
ContributorsWeller, Nicholas Anton (Author) / Daniel L., Childers (Thesis director) / Grimm, Nancy (Committee member) / Turnbull, Laura (Committee member) / Barrett, The Honors College (Contributor) / School of Sustainability (Contributor) / School of Public Affairs (Contributor) / Graduate College (Contributor)
Created2013-05
Description
Infectious diseases have been a major threat to survival throughout human history. Humans have developed a behavioral immune system to prevent infection by causing individuals to avoid people, food, and objects that could be contaminated. This current project investigates how ambient temperature affects the activation of this system. Because temperature is positively correlated with the prevalence of many deadly diseases, I predict that temperature moderates the behavioral immune system, such that a disease prime will have a stronger effect in a hot environment compared to a neutral environment and one's avoidant behaviors will be more extreme. Participants were placed in a hot room (M = 85F) or a neutral room (M = 77F) and shown a disease prime slide show or a neutral slide show. Disgust sensitivity and perceived vulnerability surveys were used to measure an increased perceived risk to disease. A taste test between a disgusting food item (gummy bugs) and a neutral food item (gummy animals) measured food avoidance. There was no significant avoidance of the gummy and no significant difference in ratings of disgust sensitivity or perceived vulnerability as a function of temperature conditions. There were no significant interactions between temperature and disease. The conclusion is that this study did not provide evidence that temperature moderates the effect of disease cues on behavior.
ContributorsOsborne, Elizabeth (Author) / Cohen, Adam B. (Thesis advisor) / Kwan, Sau (Committee member) / Neuberg, Steven (Committee member) / Arizona State University (Publisher)
Created2012
Description
The present study explored the relationship between desired purchasing behavior and individual differences using two nationally-representative, longitudinal samples of the U.S. population early in the COVID-19 pandemic. Past research has shown that individual differences provide information about how one might respond to threat. Therefore, we predicted changes in desired purchasing behavior across different sociodemographic variables that might reflect those differences. Specifically, we investigated hypotheses related to political orientation, age, sexual orientation, socioeconomic status, and whether or not the participant had children. We measured participants’ reported desired purchasing behavior across eleven categories of goods and investigated the connection between specific demographic variables and desired purchasing behavior. We found that conservatives desired to purchase more basic protection goods (guns/ammunition, cash, gas) and that older people desired to purchase more cleaning supplies and toiletries. These findings illustrate possible explanations for purchasing behavior during the COVID-19 pandemic and reveal directions for marketing designed to influence purchasing behavior.
ContributorsZeider, Justyn (Author) / Varnum, Michael (Thesis director) / Neuberg, Steven (Committee member) / Department of Psychology (Contributor) / School of International Letters and Cultures (Contributor) / School of Social Transformation (Contributor) / Sandra Day O'Connor College of Law (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05
Description
Regular instances of employee and petty theft seem to suggest that stealing is common. Certain situations make stealing an advantageous opportunity, and studies show that most people will steal under the right conditions. However, these "right conditions" vary widely among individuals and are a combination of biological, social, psychological, and situational factors. In an attempt to better understand the rationality of stealing, our research team applied evolutionary psychology principles to a social experiment involving gift card theft. To find trends in how people will steal when given the opportunity, we attempted to create these "right conditions" (which we believed would encourage theft by minimizing cost) so that we could measure how a random sample of subjects (male students on the Tempe campus of Arizona State University) responded to variation in benefit. We predicted that if the cost was kept low, and if some gift cards conferred greater advantages than others (by possession greater value or utility), then the more advantageous gift cards would be stolen at a higher frequency from the sample pool than less advantageous ones. The results show that our assumptions were wrong. Theft almost never occurred and the few cards that were stolen were not the more "rational" choices as predicted. The experimental design indicates a flawed understanding of how the subjects weighed the benefits and costs of stealing gift cards. One major issue is that we failed to consider pro-social behavior as the norm. We also neglected the evolutionary benefits of cooperative behavior while overemphasizing the evolutionary benefits of theft. A more thorough and nuanced examination of the literature must be performed to avoid these fundamental flaws in the experiment in the future. The experiment also suffered from issues which might have inadvertently discouraged theft including the location, population, presence of other students, and time given to contemplate theft. If we wish to truly examine trends in theft to see if there is a trend towards the rational theft model we proposed, we must work with a population in which individuals already have a propensity to steal, the benefit is sufficiently high, and social pressures to be cooperative are low.
ContributorsKumar, Davina Sangitha (Author) / Angilletta, Michael (Thesis director) / Neuberg, Steven (Committee member) / Barrett, The Honors College (Contributor) / School of Life Sciences (Contributor)
Created2015-05
Description
Contextual cues can impact how statements are perceived. Specifically, they may be perceived as more aggressive than they otherwise would be. For the study, both medium of communication (in-person versus online) as well as how competitive the context was (non-competitive or competitive) were examined, with a bit of focus on gender. 130 Arizona State University students enrolled in Psychology 101 were surveyed; the mean age was 19.32 (SD = 1.43). A 2x2 factorial design was used, consisting of four possible conditions: In-person/Competitive, Online/Competitive, In-person/Non-Competitive, and Online/Non-Competitive. Participants read two scenarios, each featuring a target character who says an ambiguous statement, and each scenario with one of the four conditions at random. One scenario involved earning a promotion, and the other involved trying to win a voucher via mini-golf. After, participants answered questions regarding how they felt about the intent of the ambiguous statement, how the participant would feel in the scenario, and what kind of person the participant felt the target character was. Exploratory Factor Analysis with Principal Axis Factoring and Direct Oblimin Rotation was used to find outcome variables. We hypothesized that Perceived Aggression and Participant Negative Emotion would be higher in both the competitive condition as well as the online condition, and that Perceived Agreeableness would be higher in both the non-competitive condition as well as the in-person condition; this applied for both scenarios. The results were mostly not statistically significant, and contrary to the hypotheses, Perceived Aggression and Participant Negative Emotion were higher in the in-person condition than the online condition. However, as predicted, Perceived Agreeableness was higher for the in-person condition, and the competitive led to higher levels of Perceived Aggression and Participant Negative Emotion, along with lower levels of Perceived Agreeableness, as opposed to the non-competitive condition. Limitations included a small age range and only one type of online communication (instant messaging), along with the fact that the study was a survey. Future studies are needed to examine what factors affect perception of aggression, as very few have been conducted.
ContributorsRobins, Alexander Eric (Author) / Shiota, Michelle (Lani) (Thesis director) / Neuberg, Steven (Committee member) / Danvers, Alexander (Committee member) / Department of Psychology (Contributor) / Barrett, The Honors College (Contributor)
Created2016-05
Description
As the daughter of Mexican parents, I was raised with family-centered values which conflict with the values of independence, freedom and individuality stressed in the United States. Being a minority has become part of my identity, thus influencing how I make decisions about finances and traveling. Minorities are faced with many more concern, like familial concerns and financial obligations which hinder their desire to attempt to travel (Salisbury, Paulsen, & Ernest, 2011). My main concerns were convincing my parents that traveling to Nicaragua and studying abroad in Greece and Italy would be beneficial to my college experience, along with financially being able to go through with each experience. The main purpose of my thesis is to share what it is like to be a minority faced with cultural and financial obstacles that make it difficult to travel and how the experience is shaped due to these obstacles.
ContributorsValtierra, Nancy Jazmin (Author) / Larson, Elizabeth (Thesis director) / Facinelli, Diane (Committee member) / Barrett, The Honors College (Contributor) / T. Denny Sanford School of Social and Family Dynamics (Contributor) / Department of Psychology (Contributor) / Graduate College (Contributor)
Created2014-05
Description
In the current study, the author investigated whether sociosexual orientation interacted with an experimental manipulation of sex ratios previously used by Li et al. (2010) which showed that men and women report greater religiosity after viewing profiles of attractive members of their own sex. The author predicted that only people of restricted sociosexual orientation would be reporting greater religiosity after viewing profiles of attractive members of their own sex. A sample of 171 undergraduate students (85 men, Mage = 19.5) from a large Southwestern university participated in the study for course credit. Participants were first administered the Sociosexual Orientation Index (Simpson & Gangestad, 1991). Then, under the pretense of assisting psychology faculty in designing a dating website for incoming students, participants viewed a set of profiles (photo and description) of either attractive men or attractive women, after which they answered a series of questions on a religiosity scale developed for the current study. Results showed that sociosexual orientation did not interact significantly with the experimental manipulation. Additionally, the results of the current study failed to replicate those of Li et al. (2010). The author discusses possibilities for why the results of the current study failed to replicate the results of Li et al., and for alternative explanations of the potential role of sociosexual orientation in responding to shifting sex ratios.
ContributorsCottengaim, Isaiah John (Author) / Cohen, Adam (Thesis director) / Neuberg, Steven (Committee member) / Barrett, The Honors College (Contributor) / School of Social and Behavioral Sciences (Contributor)
Created2014-05
Description
Through this creative project, I executed a Distracted Driving Awareness Campaign at Arizona State University to raise awareness about the dangers of distracted driving, specifically texting while driving. As an Undergraduate Student Government Senator, my priority is the safety and success of students, both in and out of the classroom. By partnering with State Farm and AT&T, we were able to raise awareness about the dangers of distracted driving and collected over 200 pledges from students to never text and drive.
ContributorsHibbs, Jordan Ashley (Author) / Miller, Clark (Thesis director) / Parmentier, Mary Jane (Committee member) / Barrett, The Honors College (Contributor) / College of Liberal Arts and Sciences (Contributor) / School of Politics and Global Studies (Contributor) / Department of Psychology (Contributor) / Graduate College (Contributor)
Created2014-05
Description
An investigation of the Caregiver Autism Residential E-health (CARE) system composed of low-cost, end-user deployable smart home technology and accompanying heuristics for rule-based models of human behavior has been evaluated for its potential as an empowering assistive technology with the capacity to enhance the well-being of people living with autism, their caregivers, and family members. It allows adults living with autism to create personalized smart home interventions that provide motivational support and is accompanied by guidelines for a safe and effective means of behavioral change. This investigation contributes a participatory co-design approach which addresses both the role of flexibility for the dynamic needs of the individual while offering strategies for dealing with the challenges of designing assistive smart home technologies for the needs of individuals across the wide range of autism spectrum disorders.
ContributorsNewman, Naomi Catton (Author) / Burleson, Winslow (Thesis director) / Brotman, Ryan (Co-author) / Lozano, Cecil (Co-author) / Adams, Jim (Committee member) / Zautra, Alex (Committee member) / Barrett, The Honors College (Contributor) / Graduate College (Contributor) / School of Community Resources and Development (Contributor) / Department of Psychology (Contributor) / School of Human Evolution and Social Change (Contributor)
Created2013-05
Description
The aim of this thesis was to explore whether major life changes can have a visual, perceptible impact on facial changes. The proposed mediation model suggested that changes in personality serve as a mediating factor between life experiences and facial changes throughout the lifetime. The proposed model was tested by examining (1) perceived personality changes, (2) perceived physical changes, and (3) major life changes in photos of individuals' old-aged faces compared to their respective younger faces. Participants in the current study viewed old and young photos of 29 Miss America pageant winners and rated how much each older face changed from its respective younger face on the following criteria: age change, overall change, personality change, and physical change. Responses were aggregated across participants for each target, and personality and physical items were separately composited into single measures of overall perceived personality change and overall perceived physical change. Results did not support the proposed model; however, some marginally significant correlations were found between the number of times the targets experienced a change in marital status and the appearance of being calm, feminine, and less changed in older age. However, these correlations were in the reverse direction from what was expected; further research is needed to understand how marital changes influence, and are influenced by, personality and physical changes. As a form of face perception, the processes underlying the proposed model are discussed in terms of possible social consequences. Further research is needed to explore whether changes in life events, such as the ones presented here, are related to specific facets of personality and physical changes, and how these perceptions translate to important social outcomes. Suggestions for future research pertaining to these issues are discussed.
ContributorsMichael, Kendra (Author) / Kwan, Virginia (Thesis director) / Knight, George (Committee member) / Neuberg, Steven (Committee member) / Barrett, The Honors College (Contributor) / College of Liberal Arts and Sciences (Contributor)
Created2012-12