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MINORITIES' PERCEPTIONS OF MINORITY-WHITE BIRACIALS: THE ROLE OF IDENTIFICATION FOR COGNITIVE, AFFECTIVE, AND BEHAVIORAL RESPONSES
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Research on intergroup relations has a rich history in social psychology, with scholars devoting a considerable effort investigating factors that influence stereotyping, prejudice and discriminatory behavior. The results of these studies suggest that individuals' cognitions, affect, and behaviors are affected by their own group memberships as well as the groups to which others belong. People generally view the groups that they belong to (their ingroup) positively, and view the groups that others belong to (outgroups) stereotypically (Tajfel & Turner, 1986). However, much of the research on social identification and subsequent perceptions has focused on socially distinct groups rather than groups that blur categorical boundaries. As such, there is a dearth of research on how individuals identify with and perceive people who belong to multiple racial groups. To address this gap in the literature, I investigated minorities' identification with minority-White biracials, as well as the downstream cognitive (warmth and competence stereotypes), affective (pride, shame), and behavioral (facilitation, distancing) consequences of identification across three studies. Results demonstrated that Black (Study 1) and Hispanic (Study 2) participants were equally identified with biracials and other ingroup members (Blacks, Hispanics), and were less identified with outgroup members (Whites). In contrast, White participants (Study 1) were most identified with other White people, least identified with Black people, and moderately identified with Black-White biracial people. Moreover, Black participants stereotyped Blacks and Black-White biracials as equally warm and competent (Study 1); Hispanic participants felt equally proud of and were equally willing to help Hispanics and Hispanic-White biracials (Study 2); and both Black and Hispanic participants felt equally ashamed when a Black or Hispanic and Black-White or Hispanic-White biracial person acted in a stereotypically negative manner, and wanted to distance themselves from the wrongdoer (Study 3). In contrast, minorities perceived Whites less positively across measures of stereotypes, emotions and behaviors. Finally, consistent with self-categorization theory (Turner et al., 1987), minorities' identification with minority-White biracials predicted their group-based stereotypes, emotions and behaviors. These results make an important contribution to the limited work on perceptions of biracial people, and extend previous research regarding the role of identification for intergroup perceptions.
Counterfeiting in American Literature
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This dissertation provides an analysis of representations of counterfeiting in American literature across the eighteenth and nineteenth centuries. One of the oldest crimes in America and until the Civil War one of the most prevalent, counterfeiting appealed to the literary imagination not merely because it was so common, but because, as a fundamentally ambiguous activity, it seemed to expose significant fault lines in American life. The ambiguity of counterfeiting arose from the fact that its performance, and especially its successful performance, explicitly challenged the stability of the concepts, such as monetary value and sovereign authority, that were necessary to define it as a crime. Counterfeiting thus probed the shifting and often permeable boundaries between what was considered legitimate and illegitimate, legal and illegal, moral and immoral, natural and artificial, valuable and valueless, real and imaginary. The subject of counterfeiting became for a diverse group of American writers, from Benjamin Franklin, Stephen Burroughs and Charles Brockden Brown in the eighteenth century, to John Neal, George Lippard, and Herman Melville in the nineteenth century, a lens through which social and political analysis could be brought into focus, and a fertile source of philosophical speculation and literary creation. Once it was figured as a literary subject, counterfeiting also had a profound impact on the texture and development of American literature across this period. Most obviously, attempts to represent counterfeiting and counterfeiters gave rise to new experiences, new characters, new settings, and new vernaculars. Less obviously, the ambiguity of counterfeiting was such that it exerted pressure on the traditional literary forms, such as the picaresque narrative and the gothic novel, which were deployed in an effort to make it meaningful. What is more, sustained reflection upon the meaning of counterfeiting often led American writers to doubt the possibility of truthful or meaningful representation as such. "Counterfeiting in American Literature" thus seeks to demonstrate that the subject of counterfeiting exists in American literature as a site of literary creativity and cultural tension, a site where older literary forms are recast to fit new circumstances, and where different ideas are inaugurated and tested.
Boronic Acids as Penicillinase Inhibitors
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Abstract Boronic Acids as Penicillinase Inhibitors by Juan F. Barquero Advisor: Dr. Manfred Philipp. £]-lactamases are enzymes produced by bacteria resistant to antibiotics. A common feature on beta lactam antibiotics is the beta-lactam ring. £]-lactamases hydrolyze the £]-lactam ring leaving the antibiotic inoperative. The advent of bacteria that are resistant to £]-lactams has impelled researchers to find inhibitors for £]-lactamases that mimic the lactam ring but do not get hydrolyzed. One group of these new antibiotics is the aryl boronic acids. The main reason the boronic acids have been chosen as potential drugs is their lack of toxicity and their easy excretion in the urine. One of the most important structural features of these compounds is their chemical and geometric fitness in the active site of £]-lactamases. Boronic acids mimic the tetrahedral intermediate formed in the half-acylation reaction that occurs during the hydrolysis of the fÒ-lactam ring. The major goal of the research presented here was to discover new aryl boronic acids inhibitors of penicillinases from the class A £]-lactamases. To accomplish this goal, commercially available boronic acids that are manufactured for the Suzuki reaction were used. These compounds included fluorinated, chlorinated, brominated, carboxylated, nitrophenylated, pinacol-esterified and thiophene-carboxylated aryl boronic acid derivatives. Kinetic evaluations of each class of compounds were performed under pseudo first-order enzymatic reaction conditions and the inhibitory constants (Ki) were reported using nitrocefin as substrate for two enzymes: the in-house expressed £]-lactamase BlaC and the £]-lactamase from Bacillus cereus 569/H9 (Calbiochem) identified as TEM-116. The structure-activity relationship (SAR) showed that the most potent inhibitors of BlaC £]-lactamase were 2-carboxythiophene-5-boronic acid; 3,4,5-trifluorophenylboronic acid; 3-nitrophenytlboronic acid and 2,3,4,5-tetrafluorophenylboronic acid, Ki values of 1.2, 175.7, 213.9 and 228.6 micromolar respectively. In addition, SAR revealed that the most potent inhibitors for Bacillus cereus £]-lactamase I were 2-carboxythiophen-5-boronic acid, 3-carboxyphenylboronic acid, 2-carboxythiophene-4-boronic acid, and 3-carboxy-4-fluorophenylboronic acid having Ki values of 1.1, 19.4, 46.5, and 47.1 micromolar respectively. To gain further insight into the molecular interactions between each class of inhibitors and their targeted enzymes docking experiments were performed using Autodock Vina program combined with Sculpt from MDL and followed by the molecular visualization of the protein-ligand complexes using Swiss-PdbViewer and DiscoveryStudio from Accelerys. The results conclusively show that some selective classes of aryl boronic acids are potent competitive inhibitors of BlaC and Bacillus cereus £]-lactamase I and that they should be further considered for advanced drug discovery and improvement of treatment against antibiotic resistant bacteria. Furthermore, the discovery that 4,4¡¦-DDT is an inhibitor of Mycobacterium tuberculosis £]-lactamase, combined with in silico studies, suggests that further elaboration of this molecule may be one route to new inhibitors.
Contact-induced changes in word order and intonation in the Spanish of New York City bilinguals
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Hispanic & Luso Brazilian Literatures & Languages
This dissertation is a variationist sociolinguistic analysis of the variable word order and prosody of copular constructions (Nicolás es feliz versus Feliz es Nicolás, Es Nicolás feliz, Es feliz Nicolás, `Nicolas is happy') in the Spanish of first- and second-generation Spanish-English bilinguals in New York City. The data used for the study come from a spoken corpus of Spanish in New York City based on 140 sociolinguistic interviews (details of the corpus will be presented in Chapter Three). This dissertation addresses the question of whether second-generation bilinguals have a less flexible word order in Spanish as a result of their increased use of, and contact with, English, where a more fixed order prevails. We will show that the informants in the present study, like their peers in Los Angeles and other parts of the US, exhibit a more rigid word order compared to their first-generation peers. We have established that this increase in rigidity of word order among the second-generation can be attributed in large part to their increased use of and contact with English. The studies mentioned above have interpreted their results to mean that these speakers are losing or have lost the discourse pragmatic constraints that govern word order. However, the data here show that the first- and second-generation speakers in the present study share many of the same conditioning variables and constraints for word order, although these variables appear to account for a smaller amount of variance among the second-generation. In this way, we have established that the second-generation is not losing the discourse pragmatic constraints that govern word order, but that they are differently sensitive to these constraints. In fact, we show that second-generation speakers are very capable of communicating the pragmatic functions that the first-generation speakers do using word order because they maintain the prosodic details of their first-generation counterparts. In other words, the second-generation communicates these functions in ways that are slightly different from the first-generation, relying more on prosodic resources than syntactic ones. Furthermore, the data indicate that their prosodic patterns are not modeled after the prosody of English. In general terms we show that the second-generation does not have a different grammar from their first-generation counterparts, as is claimed by other researchers. Instead we show that these speakers favor certain first-generation strategies over others.
The Effects of Ethnic Matching on Abusive/Neglectful Minority Clients' Counseling Satisfaction, Engagement, Pre-mature Termination, and Outcome
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Georgiana Shick Tryon
This dissertation explored the relationship of ethnic matching between abusive and/or neglectful ethnic minority parents and minority counselors. Specifically, it examined these clients' satisfaction with and engagement in counseling as well as type of termination (unilateral or continuing) and outcome (client adjustment, meeting of agency goals, and re-abuse). This study also looked at the relationships of ethnic identity and acculturation discrepancies of clients who abused their children and their counselors, who were either ethnically matched or not matched, to client satisfaction, client engagement, client termination type, and client outcome. This dissertation sought to answer the following questions: (a) Are child-abusing clients who are ethnically matched with their counselors more satisfied with the intake counseling session than those who are not ethnically matched? (b) Are child-abusing clients who are ethnically matched with counselors more likely to become engaged in counseling than their non-matched counterparts? (c) Are child-abusing clients who are ethnically matched with their counselors less likely to terminate early than those who are not ethnically matched? ( d) Do child-abusing clients who are ethnically matched with their counselors have better outcomes than those who are not ethnically matched? (e) How do client-counselor differences in ethnic identity and acculturation relate to client satisfaction, engagement, termination, and outcome? I confirmed that abusive/neglectful clients who were ethnically matched with their counselors were significantly less likely to terminate prematurely after engagement than ethnically unmatched clients. Ethnic matching was not related to engagement, client satisfaction, or counseling outcome. Overall, results of this study suggested that ethnic matching per se may have little to do with client satisfaction, engagement, and outcome. Results also suggested that in contrast to ethnic matching, client-counselor ethnic identity discrepancy is important in client engagement, early-termination, and counseling outcome regardless of whether or not clients are ethnically matched. Although acculturation discrepancy was related to re-abuse, it had little relationship with the other variables in this study.
Components of Emotional Experience and Reaction Time: A study of Normal Aging and Parkinson's Disease
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We examined whether valence or arousal levels affect decision and movement times in Parkinson's disease (PD) and in healthy aging. For both decision and movement time, we were interested in differences in the speed and variability in responding. We also studied whether emotional experience is altered as a result of the aging process and PD pathology. Participants included 16 young healthy adults, 15 older healthy adults, and 15 non-demented individuals with mild PD. The PD participants were tested on medication. Participants viewed pictures from the International Affective Picture System (IAPS; Lang, Bradley, & Cuthbert, 2001) differing in emotional content and performed self-report valence and arousal ratings during picture presentation. Components of reaction time (i.e., decision time [DT] and movement time [MT]) were assessed during a forced-choice reaction time task. Results demonstrated that DT and MT were differentially affected by emotional stimuli. The PD group demonstrated significantly longer and more variable DTs than did the healthy controls for negative, positive, and neutral pictures; however, only the MTs for negative and neutral images were significantly different or more variable between groups. Although DTs were longer for the older control group relative to the younger control group, MTs were equivalent between the two control groups. Evidence of altered emotional experience in PD was found, as the PD participants rated negative pictures as less negative than did healthy older adults; however, this significant difference was reduced to a trend when individuals with more severe depressive symptomatology were excluded from the analysis. In addition, high arousal images were rated as more highly arousing among the PD group when depressed individuals were not included in the analyses. There was no evidence of impaired emotional experience as a function of aging, as valence and arousal ratings were not significantly different between younger and older adults. Better understanding of emotional processing deficits, which have been associated with poorer quality of life, in healthy aging and PD may lead to a better understanding of the neural bases of emotional processing, as well as offer treatment approaches.
PRICING COLLATERALIZED DEBT OBLIGATIONS WITH PURE JUMP LÉVY PROCESSES: A DYNAMIC BOTTOM-UP APPROACH
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The Gaussian copula model is the industry standard in pricing CDO tranches because of its easy implementation and speedy calibration. However, it has several well-known shortcomings: It leads to the so-called correlation smile", generates symmetric and light-tailed asset return distributions and it is static. This dissertation proposes a dynamic bottom-up model based on a pure jump Lévy process, a path rarely taken in the credit pricing literature, and makes a comprehensive empirical analysis of bottom-up CDO pricing models. Owing to its ability to capture asymmetric heavy-tailed return distributions and to accommodate different degrees of dampening for positive and negative jumps, empirical evidence shows that the proposed model significantly outperforms the models commonly employed in the industry and frequently referenced in the literature in fitting CDX and iTraxx tranche spreads. As such, it constitutes an important addition to the credit pricing literature.
The Powerful Voice of Women Dramatists in the Arab American Theatre Movement
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The Powerful Voice of Women Dramatists in the Arab American Theatre Movement by Dalia Basiouny Advisor: Marvin Carlson This dissertation traces the recent emergance of the Arab American Theatre movement, focusing on plays by women dramatists. It presents an overview of contemporary theatre and performances by Arab American women, and explores their focus on political theatre and identity politics, through an examination of works by fifteen contemporary women playwrights and performers. The emergance of this relatively large group of women theatre writers of Arab descent is a significant cultural phenomenon because their productions not only help to create and solidify an Arab American identity for themselves, they also offer this constructed identity to their audiences. The political expression of this young theatre movement takes on different articulations, according to the different genres the dramatists use. The introduction presents Rania Khalil's silent performance piece and Suheir Hammad's collage performance . Chapter one examines three autobiographical solo performances. Leila Buck's ISite and Nora Armani's are theatrical presentations of the self through writing the story of lineage. Soha Al Jurf's documents her visits to the land of origin in the Arab world, connecting her search for identity to the killing of her Palestinian aunt. Chapter two explores the expansion from the individual search to the community. Heather Raffo's 9 Parts of Desire> is based on interviews conducted over a period of ten years with Iraqi women inside Iraq and in exile, while Nibras Group's presents verbatim responses to the question "What is Arab?" based on fifty interviews with Arab Americans and other Americans. Chapter three discusses how plays by Arab American women dramatists deal with the negotiation of identity by second-generation Arabs in America, looking at two plays by Betty Shamieh, and , and Laura Shamas' . Chapter four examines the comedy of Arab Americans, looking at the work of Maysoon Zayid and discussing the short plays presented at the Arab American Comedy Festival. The conclusion looks at the dominance of women's voice in this emerging theatre movement, and explores the aesthetic of this Arab American theatre.
Some Non-Classical Methods in Epistemic Logic and Games
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In this dissertation, we consider some non-classical methods in epistemic logic and games. We first consider, dynamic epistemic logics in topological and geometric semantics, and then extend such ideas to the cases where inconsistencies are allowed. Then, as a case example, we discuss a well known paradox in game theory which is essentially a two-person Russell's paradox. Finally, we conclude with considering an alternative approach to games where strategies are considered as the primitives of the theory, and advancing some results.
Don't Push Me Over the (Knowl)Edge: The Social Correlates of Latino High School Dropouts
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According to the forecast of the US Census Bureau, Latinos are the largest, fastest-growing ethnic group within the United States today and will comprise the majority of the US labor force sometime during the mid-21st century. Yet today, the youth of this diverse segment of the population are plagued by alarmingly high high school dropout rates, about double that of African-Americans youth and triple that of white youth. This yawning disparity prompts the examination of the social conditions contributing to this social crisis. How do demographic, aspirational, school-level, and socioeconomic variables affect the decision that so many Latino youth make to drop out of high school? Employing three waves from the Educational Longitudinal Study (2002, 2004 & 2006), this study seeks to add to the discussion of the causes of dropping out among Latinos by examining factors that influence high school persistence rates for a nationally representative sample of Latino youth. This dissertation's theoretical framework combines Bourdieu and Passeron's theory of societal reproduction, labeling theory, and social motivation theory. Variables from all three levels exerted some influence on dropout patterns among Latino youth. Attending a high school located in an urban center was especially significant in predicting the likelihood that a Latino in our sample would drop out of high school, despite the well-known personal costs.