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- Genre: Masters Thesis
- Creators: Arizona State University
- Creators: Chakraborty, Bijeta
- Member of: ASU Electronic Theses and Dissertations
Description
Courthouse dogs (sometimes referred to as facility animals) are expertly trained canines which may be used to assist individuals with psychological, emotional, or physical difficulties in a myriad of courtroom situations. While these animals are increasingly used to assist young witness to court, the jury is still out on whether or not they are prejudicial to the defendant. No known research exists in this area, although research is necessary to determine the possibly prejudicial nature of these animals. Using a mock trial paradigm involving a child sexual abuse case, the current study employed a 2 (Witness type: victim vs. bystander) x 3 (Innovation type: courthouse dog vs. teddy bear vs. none) fully-crossed factorial design. It was hypothesized that witness type and innovation type would interact to differentially impact jurors' judgments about the trial, defendant, and child witness. In addition, it was posited that emotions, such as anger and disgust, would also affect judgments and decision-making. Results indicate that courthouse dogs and comfort toys did impact jurors' decision making in some ways. In addition, emotions and witness credibility predicted sentencing, verdict, and other trial judgments.
ContributorsBurd, Kayla (Author) / Mcquiston, Dawn E (Thesis advisor) / Salerno, Jessica M (Committee member) / Schweitzer, Nicholas J (Committee member) / Arizona State University (Publisher)
Created2013
Description
Recent research has identified affirmation of transcendence and exposure to violent Bible verses as being related to greater prejudice toward value-violating out-groups (Blogowska & Saroglou, 2012; Shen et al., 2013). Effects of exposure to specific Bible verses on attitudes toward out-groups have not been measured in combination with the Post-Critical Belief Scale developed by Hutsebaut (1996). The relationships between exposure to scriptural endorsements of prejudice, affirmation vs. disaffirmation of transcendence, literal vs. symbolic processing of religious content, and prejudice toward value-violating out-groups were examined using an online survey administered to a sample of U.S. adults (N=283). Greater affirmation of transcendence scores were linked to greater prejudice toward atheists and homosexuals and more favorable ratings of Christians and highly religious people. Lower affirmation of transcendence scores were linked to less favorable ratings of Christians and highly religious people and more favorable ratings of atheists. Exposure to scriptural endorsements of prejudice did not have a significant effect on levels of prejudice in this study.
ContributorsGrove, Richard (Author) / Robles, Elías (Thesis advisor) / Hall, Deborah (Committee member) / Schweitzer, Nicholas (Committee member) / Arizona State University (Publisher)
Created2013
Description
Efficiency of components is an ever increasing area of importance to portable applications, where a finite battery means finite operating time. Higher efficiency devices need to be designed that don't compromise on the performance that the consumer has come to expect. Class D amplifiers deliver on the goal of increased efficiency, but at the cost of distortion. Class AB amplifiers have low efficiency, but high linearity. By modulating the supply voltage of a Class AB amplifier to make a Class H amplifier, the efficiency can increase while still maintaining the Class AB level of linearity. A 92dB Power Supply Rejection Ratio (PSRR) Class AB amplifier and a Class H amplifier were designed in a 0.24um process for portable audio applications. Using a multiphase buck converter increased the efficiency of the Class H amplifier while still maintaining a fast response time to respond to audio frequencies. The Class H amplifier had an efficiency above the Class AB amplifier by 5-7% from 5-30mW of output power without affecting the total harmonic distortion (THD) at the design specifications. The Class H amplifier design met all design specifications and showed performance comparable to the designed Class AB amplifier across 1kHz-20kHz and 0.01mW-30mW. The Class H design was able to output 30mW into 16Ohms without any increase in THD. This design shows that Class H amplifiers merit more research into their potential for increasing efficiency of audio amplifiers and that even simple designs can give significant increases in efficiency without compromising linearity.
ContributorsPeterson, Cory (Author) / Bakkaloglu, Bertan (Thesis advisor) / Barnaby, Hugh (Committee member) / Kiaei, Sayfe (Committee member) / Arizona State University (Publisher)
Created2013
Description
Class D Amplifiers are widely used in portable systems such as mobile phones to achieve high efficiency. The demands of portable electronics for low power consumption to extend battery life and reduce heat dissipation mandate efficient, high-performance audio amplifiers. The high efficiency of Class D amplifiers (CDAs) makes them particularly attractive for portable applications. The Digital class D amplifier is an interesting solution to increase the efficiency of embedded systems. However, this solution is not good enough in terms of PWM stage linearity and power supply rejection. An efficient control is needed to correct the error sources in order to get a high fidelity sound quality in the whole audio range of frequencies. A fundamental analysis on various error sources due to non idealities in the power stage have been discussed here with key focus on Power supply perturbations driving the Power stage of a Class D Audio Amplifier. Two types of closed loop Digital Class D architecture for PSRR improvement have been proposed and modeled. Double sided uniform sampling modulation has been used. One of the architecture uses feedback around the power stage and the second architecture uses feedback into digital domain. Simulation & experimental results confirm that the closed loop PSRR & PS-IMD improve by around 30-40 dB and 25 dB respectively.
ContributorsChakraborty, Bijeta (Author) / Bakkaloglu, Bertan (Thesis advisor) / Garrity, Douglas (Committee member) / Ozev, Sule (Committee member) / Arizona State University (Publisher)
Created2012
Description
Juror impartiality is necessary for a fair and just legal system, but is true juror impartiality
realistic? The current study investigated the role of implicit and explicit social-cognitive biases in jurors’ conceptualizations of insanity, and the influence of those biases in juror verdict decisions. It was hypothesized that by analyzing the role of implicit and explicit biases in insanity defense cases, jurors’ attitudes towards those with mental illnesses and attitudes towards the insanity defense would influence jurors’ final verdict decisions. Two hundred and two participants completed an online survey which included a trial vignette incorporating an insanity defense (adapted from Maeder et al., 2016), the Insanity Defense Attitude Scale (Skeem, Louden, & Evans, 2004), Community Attitudes Towards the Mentally Ill Scale (Taylor & Dear, 1981), and an Implicit Association Test (Greenwald et al., 1998). While implicit associations concerning mental illness and dangerousness were significantly related to mock jurors’ verdicts, they no longer were when explicit insanity defense attitudes were added to a more complex model including all measured attitudes and biases. Insanity defense attitudes were significantly related to jurors’ verdicts over and above attitudes about the mentally ill and implicit biases concerning the mentally ill. The potentially biasing impact of jurors’ insanity defense attitudes and the impact of implicit associations about the mentally ill in legal judgments are discussed.
realistic? The current study investigated the role of implicit and explicit social-cognitive biases in jurors’ conceptualizations of insanity, and the influence of those biases in juror verdict decisions. It was hypothesized that by analyzing the role of implicit and explicit biases in insanity defense cases, jurors’ attitudes towards those with mental illnesses and attitudes towards the insanity defense would influence jurors’ final verdict decisions. Two hundred and two participants completed an online survey which included a trial vignette incorporating an insanity defense (adapted from Maeder et al., 2016), the Insanity Defense Attitude Scale (Skeem, Louden, & Evans, 2004), Community Attitudes Towards the Mentally Ill Scale (Taylor & Dear, 1981), and an Implicit Association Test (Greenwald et al., 1998). While implicit associations concerning mental illness and dangerousness were significantly related to mock jurors’ verdicts, they no longer were when explicit insanity defense attitudes were added to a more complex model including all measured attitudes and biases. Insanity defense attitudes were significantly related to jurors’ verdicts over and above attitudes about the mentally ill and implicit biases concerning the mentally ill. The potentially biasing impact of jurors’ insanity defense attitudes and the impact of implicit associations about the mentally ill in legal judgments are discussed.
ContributorsHamza, Cassandra (Author) / Neal, Tess M.S. (Thesis advisor) / Schweitzer, Nicholas (Committee member) / Hall, Deborah (Committee member) / Arizona State University (Publisher)
Created2018
Description
In an affordance management approach, stereotypes, prejudices, and discrimination are conceptualized as tools to manage the potential opportunities and threats afforded by others in highly interdependent social living. This approach suggests a distinction between two “kinds” of stereotypes. “Base” stereotypes are relatively factual, stable beliefs about the capacities and inclinations of groups and their members, whereas “affordance stereotypes” are beliefs about potential threats and opportunities posed by groups and their members. Two experiments test the hypothesized implications of this distinction: (1) People may hold identical base stereotypes about a target group but hold very different affordance stereotypes. (2) Affordance stereotypes, but not base stereotypes, are shaped by perceiver goals and felt vulnerabilities. (3) Prejudices and (4) discrimination are more heavily influenced by affordance stereotypes than by base stereotypes. I endeavored to manipulate participants’ felt vulnerabilities to measure the predicted corresponding shifts in affordance (but not base) stereotype endorsement, prejudices, and discriminatory inclinations toward a novel target group (Sidanians). In Study 1 (N = 600), the manipulation was unsuccessful. In Study 2 (N = 338), the manipulation had a partial effect, allowing for preliminary causal tests of the proposed model. In both studies, I predicted and found high endorsement of the base stereotypes that Sidanians try to share their values and actively participate in the community, with low variability. I also predicted and found more variation in affordance (vs. base) stereotype endorsement, which was systematically related to participants’ felt vulnerabilities in Study 2. Taken together, these findings support my hypothesized distinction between base stereotypes and affordance stereotypes. Finally, I modeled the proposed correlational relationships between felt vulnerabilities, base stereotypes, affordance stereotypes, prejudices, and discriminatory inclinations in the model. Although these relationships were predominantly significant in the predicted directions, overall fit of the model was poor. These studies further our critical understanding of the relationship between stereotypes, prejudices, and discrimination. This has implications for how we devise interventions to reduce the deleterious effects of such processes on their targets, perhaps focusing on changing perceiver vulnerabilities and perceived affordance (rather than base) stereotypes to more effectively reduce prejudices and discrimination.
ContributorsPick, Cari Marie (Author) / Neuberg, Steven L. (Thesis advisor) / Kenrick, Douglas T. (Committee member) / Martin, Carol L (Committee member) / Arizona State University (Publisher)
Created2018
Description
Anti-atheist prejudice is cross-culturally prevalent and marked by intuitive distrust. However, recent research suggests that, when social perceivers know additional relevant information about others (i.e., their reproductive strategies), this information overrides religious information and nonreligious targets are trusted as much as religious targets. That is, perceivers seem to use religious information as a cue to a specific set of behavioral traits, but prioritize direct information about these traits when available. Here, I use this framework to explore the possibility that atheists are viewed positively in certain circumstances. First, atheists might be viewed positively for certain purposes because of their perceived reproductive strategies, even while being trusted less. Second, atheists who are family-oriented do not sacrifice trust, but may still be viewed positively for other traits (i.e., open-mindedness, scientific thinking). Third, given the constraints religion often imposes on behavior, atheists might be trusted more in situations where these constraints interfere with religious people’s inclination to cooperate. I tested these hypotheses using fictitious social media profiles to examine social perception. The study had a 3 (Target Religion: Religious, Nonreligious, or Atheist) × 3 (Target Reproductive Strategy: No Information, Committed, Uncommitted) experimental design (N = 550). Contrary to my predictions, participants did not rate atheists and nonreligious targets as “fast” compared to religious targets. Consistent with predictions, however, atheists and nonreligious individuals were rated significantly higher on perceived open-mindedness and scientific thinking. Finally, atheist and nonreligious targets were trusted more in two of the three trust domains: trust with scientific findings that contradict their worldview and trust with a secret about a friend’s abortion. Further analyses compared patterns of responding for religious and nonreligious individuals, finding evidence for ingroup bias in most perceptions, but not all. Results suggest that perceptions of atheists are complex, but that atheists may, at least sometimes, be viewed favorably. Finally, these results point to the importance of reproductive strategy as a dimension of social perception, as this variable had a clear effect, independent of target religion, on the hypothesized perceptions.
ContributorsMoon, Jordan W (Author) / Cohen, Adam B. (Thesis advisor) / Neuberg, Steven L. (Committee member) / Kenrick, Douglas T. (Committee member) / Arizona State University (Publisher)
Created2018
Differential perceptions of LGBT individuals: the intersectionality of sexual orientation and gender
Description
Current research on anti-gay attitudes has focused heavily on heterosexuals versus
non-heterosexuals, with very little research delving into the differences within these “non-heterosexual” groups. The author conducted an exploratory analysis of how the intersectional effect of gender and sexual orientation affect perceptions of target groups’ gender and sexuality, which in turn might explain different levels of prejudice toward LGBT subgroups. Based on previous studies, the author hypothesized that participants would believe that a gay male has a more fixed sexuality than a lesbian, leading in turn to higher levels of moral outrage. This study further aims to extend the literature to perceptions of bisexual and transgender individuals by testing competing hypotheses. Participants might feel less moral outrage toward these groups than other LGBT subgroups because they believe their sexuality is even less fixed than lesbians’. Alternatively, participants might feel more moral outrage toward bisexual and transgender targets (versus other LGBT groups) because of the uncomfortable feeling of uncertainty about these groups’ sexuality and/or gender. Overall, participants demonstrated an interactive effect of gender and sexuality on factors including perceived sexual orientation, perceived biological sex, perceived gender identity, perceived sexual fixedness, and moral outrage rather than gender having a main effect on perceptions of gender and sexual orientation having a main effect on perceptions of sexuality. Furthermore, perceptions of sexual fixedness mediated the effect of gender on moral outrage for heterosexual target groups, but not gay targets. Gender certainty mediated the effect of gender on moral outrage for pre-op transgender target groups, but not heterosexuals. This work is important to inform future research on the topics of the intersection of sexuality and gender, especially to extend the limited literature on perceptions of bisexual and transgender individuals.
non-heterosexuals, with very little research delving into the differences within these “non-heterosexual” groups. The author conducted an exploratory analysis of how the intersectional effect of gender and sexual orientation affect perceptions of target groups’ gender and sexuality, which in turn might explain different levels of prejudice toward LGBT subgroups. Based on previous studies, the author hypothesized that participants would believe that a gay male has a more fixed sexuality than a lesbian, leading in turn to higher levels of moral outrage. This study further aims to extend the literature to perceptions of bisexual and transgender individuals by testing competing hypotheses. Participants might feel less moral outrage toward these groups than other LGBT subgroups because they believe their sexuality is even less fixed than lesbians’. Alternatively, participants might feel more moral outrage toward bisexual and transgender targets (versus other LGBT groups) because of the uncomfortable feeling of uncertainty about these groups’ sexuality and/or gender. Overall, participants demonstrated an interactive effect of gender and sexuality on factors including perceived sexual orientation, perceived biological sex, perceived gender identity, perceived sexual fixedness, and moral outrage rather than gender having a main effect on perceptions of gender and sexual orientation having a main effect on perceptions of sexuality. Furthermore, perceptions of sexual fixedness mediated the effect of gender on moral outrage for heterosexual target groups, but not gay targets. Gender certainty mediated the effect of gender on moral outrage for pre-op transgender target groups, but not heterosexuals. This work is important to inform future research on the topics of the intersection of sexuality and gender, especially to extend the limited literature on perceptions of bisexual and transgender individuals.
ContributorsMalik, Sarah Elizabeth (Author) / Salerno, Jessica M (Thesis advisor) / Schweitzer, Nicholas (Committee member) / Hall, Deborah (Committee member) / Arizona State University (Publisher)
Created2016
Description
In this thesis, a digital input class D audio amplifier system which has the ability
to reject the power supply noise and nonlinearly of the output stage is presented. The main digital class D feed-forward path is using the fully-digital sigma-delta PWM open loop topology. Feedback loop is used to suppress the power supply noise and harmonic distortions. The design is using global foundry 0.18um technology.
Based on simulation, the power supply rejection at 200Hz is about -49dB with
81dB dynamic range and -70dB THD+N. The full scale output power can reach as high as 27mW and still keep minimum -68dB THD+N. The system efficiency at full scale is about 82%.
to reject the power supply noise and nonlinearly of the output stage is presented. The main digital class D feed-forward path is using the fully-digital sigma-delta PWM open loop topology. Feedback loop is used to suppress the power supply noise and harmonic distortions. The design is using global foundry 0.18um technology.
Based on simulation, the power supply rejection at 200Hz is about -49dB with
81dB dynamic range and -70dB THD+N. The full scale output power can reach as high as 27mW and still keep minimum -68dB THD+N. The system efficiency at full scale is about 82%.
ContributorsBai, Jing (Author) / Bakkaloglu, Bertan (Thesis advisor) / Arizona State University (Publisher)
Created2015
Description
A study was conducted to assess the effects of generational status on various measures of stigmatization, acculturative stress, and perceived social and interpersonal threat within the Mexican heritage population in the Southwest. The role of the fear of stigma by association, regardless of actual experiences of stigmatization, was investigated, including its relationships with acculturative stress, perceived threat, and social distancing. Exploratory analyses indicated that first generation Mexican Americans differed significantly from second generation Mexican Americans on the perception of Mexican nationals as ingroup members, the fear of stigma by association by Americans, and levels of acculturative stress. Additional analyses indicated that Mexican Americans with one parent born in Mexico and one in the United States held opinions and attitudes most similar to second generation Mexican Americans. Results from path analyses indicated that first-generation Mexican Americans were more likely than second-generation Mexican Americans to both see Mexican nationals as ingroup members and to be afraid of being stigmatized for their perceived association with them. Further, seeing Mexican nationals as in-group members resulted in less social distancing and lower perceived threat, but fear of stigma by association lead to greater perceived threat and greater acculturative stress. Implications for within- and between-group relations and research on stigma by association are discussed.
ContributorsBoyd, Brenna Margaret (Author) / Knight, George P (Thesis advisor) / Kwan, Sau (Committee member) / Neuberg, Steven (Committee member) / Arizona State University (Publisher)
Created2010