UNT Theses and Dissertations - 404 Matching Results

Search Results

Studies on Plant-aphid Interactions: a Novel Role for Trehalose Metabolism in Arabidopsis Defense Against Green Peach Aphid

Description: Myzus persicae (Sülzer), commonly known as the green peach aphid (GPA), is a polyphagous insect that can infest over 100 families of economically important plants and is major pest for vegetable crops. This study utilizes the Arabidopsis-GPA model system with the aim to elucidate the role of the plant disaccharide trehalose in providing defense against GPA. This study demonstrates a novel role for TPS11 in providing defense against GPA. TPS11 expression was found to be transiently induced in Arabidopsis plants in response to GPA infestation and the TPS11 gene was required for curtailing GPA infestation. TPS11, which encodes for trehalose phosphate synthase and phosphatase activities, contributes to the transient increase in trehalose in the GPA infested tissues. This work suggests that TPS11-dependent trehalose has a signaling function in plant defense against GPA. in addition, trehalose also has a more direct role in curtailing GPA infestation on Arabidopsis. This work also shows that TPS11 is able to modulate both carbohydrate metabolism and plant defenses in response to GPA infestation. the expression of PAD4, an Arabidopsis gene required for phloem-based defenses against GPA, was found to be delayed in GPA infested tps11 mutant plants along with increased sucrose levels and lower starch levels as compared to the GPA infested wild type plants. This work provides clear evidence that starch metabolism in Arabidopsis is altered in response to GPA feeding and that TPS11-modulated increase in starch contributes to the curtailment of GPA infestation in Arabidopsis.
Date: May 2012
Creator: Singh, Vijay
Partner: UNT Libraries

Exploring the Relationships Between Mindfulness, Self-compassion, and Ethnic Identity Development

Description: Ethnic identity development is a process that occurs for all individuals, and weakness in ethnic identity is associated with numerous psychosocial difficulties. Security in ethnic identity can be difficult for those exposed to varying attitudes and behaviors in a multicultural society. As such, the current study examined the influence of mindfulness and self-compassion on ethnic identity development. a sample of 479 undergraduate students completed online self-report questionnaires measuring demographic information, mindfulness, self-compassion, ethnic identity status, and self-esteem. Results suggested that mindfulness and self-compassion are significant negative predictors of ethnic identity, and that self-compassion was a better predictor of ethnic identity status than was mindfulness. Self-compassion did not moderate the relationship between mindfulness and ethnic identity status, as was hypothesized. the sample included primarily Caucasian (n = 278) individuals born in the United States, which likely limited generalizability of findings. Implications of the current findings and suggestions for future research are discussed.
Date: May 2012
Creator: Sinha, Aditi
Partner: UNT Libraries

Examining the Shade/flood Tolerance Tradeoff Hypothesis in Bottomland Herbs Through Field Study and Experimentation

Description: While there is growing evidence that shade/flood tolerance tradeoffs may be important in distributions of bottomland hardwood trees and indications that they should apply to herbs, no studies have definitively explored this possibility. Four years of field data following historic flooding were supplemented with a greenhouse experiment designed to identify interactions congruent with tradeoffs. Fifteen bottomland species were grown in two levels of water availability and three levels of shade over 10 weeks. Results indicate responses of Fimbristylis vahlii and Ammannia robusta are consistent with tradeoffs. Modification of classical allometric responses to shade by substrate saturation indicates a potential mechanism for the tradeoff in A. robusta. Responses indicating potential for increased susceptibility to physical flooding disturbance are also discussed.
Date: May 2012
Creator: Sloop, Jordan
Partner: UNT Libraries

A Comparison of Mercury Localization, Speciation, and Histology in Multiple Fish Species From Caddo Lake, a Fresh Water Wetland

Description: This work explores the metabolism of mercury in liver and spleen tissue of fish from a methylmercury contaminated wetland. Wild-caught bass, catfish, bowfin and gar were collected. Macrophage centers, which are both reactive and primary germinal centers in various fish tissues, were hypothesized to be the cause of demethylation of methylmercury in fish tissue. Macrophage centers are differentially expressed in fish tissue based on phylogenetic lineage, and are found primarily in the livers of preteleostean fish and in the spleen of teleostean fish. Histology of liver and spleen was examined in both control and wild-caught fish for pathology, size and number of macrophage centers, and for localization of mercury. Total mercury was estimated in the muscle tissue of all fish by direct mercury analysis. Selenium and mercury concentrations were examined in the livers of wild-caught fish by liquid introduction inductively coupled plasma mass spectrometry (ICP-MS). Total mercury was localized in histologic sections by laser ablation ICP-MS (LA-ICP-MS). Mercury speciation was determined for inorganic and methylmercury in liver and spleen of fish by bas chromatography-cold vapor atomic fluorescence spectroscopy (GC-CVAFS). Macrophage center tissue distribution was found to be consistent with the literature, with a predominance of centers in preteleostean liver and in spleens of teleostean fish. Little evidence histopathology was found in the livers or spleens of fish examined, but differences in morphology of macrophage centers and liver tissue across species are noted. the sole sign of liver pathology noted was increased hepatic hemosiderosis in fish with high proportions of liver inorganic mercury. Inorganic mercury was found to predominate in the livers of all fish but bass. Organic mercury was found to predominate in the spleens of all fish. Mercury was found to accumulate in macrophage centers, but concentrations of mercury in this compartment were found to vary less in relation ...
Date: May 2012
Creator: Smith, James Durward
Partner: UNT Libraries

“What Are You?”: Racial Ambiguity and the Social Construction of Race in the Us

Description: This dissertation is a qualitative study of racially ambiguous people and their life experiences. Racially ambiguous people are individuals who are frequently misidentified racially by others because they do not resemble the phenotype associated with the racial group to which they belong or because they belong to racial/ethnic groups originating in different parts of the world that resemble each other. the racial/ethnic population of the United States is constantly changing because of variations in the birth rates among the racial/ethnic groups that comprise those populations and immigration from around the world. Although much research has been done that documents the existence of racial/ethnic mixing in the history of the United States and the world, this multiracial history is seldom acknowledged in the social, work, and other spheres of interaction among people in the U.S., instead a racialized system based on the perception of individuals as mono-racial thus easily identified through (skin tone, hair texture, facial features, etc.). This is research was done using life experience interviews with 24 racially ambiguous individuals to determine how race/ethnicity has affected their lives and how they negotiate the minefield of race.
Date: May 2012
Creator: Smith, Starita
Partner: UNT Libraries

Jiggs

Description: Jiggs is a documentary that explores how Jiggs Gaffney serves despite his mental disability. By observing Jiggs’ involvement at Pine Cove Christian Camps, and revealing his past, the documentary shows how anyone can be used for a greater good, and reveals how God can be served and glorified by anyone, no matter the individual circumstances.
Date: May 2012
Creator: Sosa, Mario
Partner: UNT Libraries

Overview and Introduction to the Organ Music of Alsatian-american Composer René Louis Becker (1882-1956)

Description: This dissertation provides the first biographical overview and annotated catalog of the organ music of Alsatian-American organist and composer René Louis Becker. Born and educated in Strasbourg, Alsace, Becker emigrated to the United States in 1904 and remained active as a composer and church musician for the next 50 years. in addition to providing sources for his biographical information, documentation of the specific organs with which Becker was professionally associated is included for the purpose of evaluating possible dates of composition of his undated organ works as well as for consideration of organ registrations when performing his works. Primary sources include newspaper clippings, personal correspondence, family scrapbooks, organ archives, and both published and unpublished manuscripts. Study of these manuscripts, including rediscovery of more than fifty works of Becker’s which were previously published in the early 1900s, present an opportunity to introduce a large new body of sophisticated repertoire from a distinguished and accomplished musician to the field of organ music. Becker composed more than 180 individual works for the organ, over half of which remain in manuscript and which were completely unknown since even before his death in 1956. Becker’s complete known oeuvre for organ includes 34 marches, 15 toccatas, three published large-scale sonatas as well as numerous works styled as preludes, postludes, finales, chansons, fantasies, fugues, and multiple small-scale compositions. After a brief biography and an overview of Becker’s compositional style and complete extant organ works, an introduction to his largest-scale work for the organ, the five-movement First Sonata in G, op. 40, is given. This is followed by an illustration of the overt stylistic influences present in the first two movements of that sonata with extensive musical examples, serving to establish Becker as one of the inheritors of the romantic tradition of the large-scale organ sonata and as ...
Date: May 2012
Creator: Spritzer, Damin
Partner: UNT Libraries

Progressing From Multiple-respondent Anecdotal Assessments to Test-control Analyses of Problem Behavior

Description: The current study was designed to evaluate the utility of progressing sequentially from multiple-respondent anecdotal assessments through test-control treatment analysis as an effective and efficient method of identifying the environmental determinants of problem behavior. the goal of the study was to evaluate overall agreement among multiple respondents on the primary function of aberrant behavior using the Motivation Assessment Scale (MAS) and Questions About Behavioral Function (QABF) and, if agreement was obtained, conduct a test-control evaluation to confirm anecdotal assessment findings while simultaneously evaluating the effects of function-based treatment. for 4 individuals, at least 4 of 5 respondents to the anecdotal assessments agreed (both within and across assessments) on the probable maintaining consequence for their problem behaviors. Test-control multielement evaluations were then conducted in which baseline sessions, corresponding to the suspected operant function of each individual’s problem behavior, were alternated with sessions in which the identified contingency was arranged for alternative behavior. Each evaluation showed substantial decreases in problem behavior and maintenance of alternative responses.
Date: May 2012
Creator: Staff, Martha Joe
Partner: UNT Libraries

Psychopathic and Antisocial Personality Disorder Traits As Predictors of Reactive and Instrumental Aggression

Description: Aggression has traditionally been subdivided into two correlated, but distinct, subtypes: reactive and instrumental. Reactive aggression (RA) is considered impulsive, emotionally driven behavior, whereas instrumental aggression (IA) is planned and incentive-motivated. This thesis examines the relationships between RA, IA, psychopathy, and antisocial personality disorder (APD) symptoms in male and female offenders recruited from a jail in north Texas. Contrary to predictions, psychopathic traits did not account for more variance in aggression than did APD symptoms. Impulsivity demonstrated slight incremental validity over psychopathy for RA, and to a lesser degree, IA. the continued utility of the reactive-instrumental distinction and implications for professional practice in relation to the current study are examined. Study limitations and directions for future research are discussed.
Date: May 2012
Creator: Steadham, Jennifer A.
Partner: UNT Libraries

Superior Mirth: National Humor and the Victorian Ego

Description: This project traces the wide and varied uses of patriotic (and, at times, jingoistic and xenophobic) humor within the Victorian novel. a culture’s humor, perhaps more than any other cultural markers (food, dress, etc.), provides invaluable insight into that nation’s values and perceptions—not only how they view others, but also how they view themselves. in fact, humor provides such a unique cultural thumbprint as to make most jokes notoriously untranslatable. Victorian humor is certainly not a new topic of critical discussion; neither is English ethno-cultural identity during this era lacking scholarly attention. However, the intersection of these concerns has been seemingly ignored; thus, my research investigates the enmeshed relationship between these two areas of study. Not only do patriotic sentiment and humor frequently overlap, they often form a causational relationship wherein a writer’s rhetorical invocation of shared cultural experiences creates humorous self-awareness while “inside” jokes which reference unique Anglo-specific behaviors or collective memories promote a positive identity with the culture in question. Drawing on and extending the work of James Kincaid’s Dickens and the Rhetoric of Laughter, Harold Nicolson’s “The English Sense of Humor,” and Bergson’s and Freud’s theories of humor as a social construct, I question how this reciprocated relationship of English ethnic identity and humor functions within Victorian novels by examining the various ways in which nineteenth-century authors used humor to encourage affirmative patriotic sentiment within their readers.
Date: May 2012
Creator: Stober, Katharyn L.
Partner: UNT Libraries

Electrochemical Depostion of Bismuth on Ruthenium and Ruthenium Oxide Surfaces

Description: Cyclic voltammetry experiments were performed to compare the electrodeposition characteristics of bismuth on ruthenium. Two types of electrodes were used for comparison: a Ru shot electrode (polycrystalline) and a thin film of radio-frequency sputtered Ru on a Ti/Si(100) support. Experiments were performed in 1mM Bi(NO3)3/0.5M H2SO4 with switching potentials between -0.25 and 0.55V (vs. KCl sat. Ag/AgCl) and a 20mV/s scan rate. Grazing incidence x-ray diffraction (GIXRD) determined the freshly prepared thin film electrode was hexagonally close-packed. After thermally oxidizing at 600°C for 20 minutes, the thin film adopts the tetragonal structure consistent with RuO2. a hydrated oxide film (RuOx?(H2O)y) was made by holding 1.3V on the surface of the film in H2SO4 for 60 seconds and was determined to be amorphous. Underpotential deposition of Bi was observed on the metallic surfaces and the electrochemically oxidized surface; it was not observed on the thermal oxide.
Date: May 2012
Creator: Taylor, Daniel M.
Partner: UNT Libraries

Improving Family-provider Relationships Through Cultural Training and Open-ended Client Interviews

Description: Behavior analysts form parent-professional relationships with families of many different backgrounds. the study evaluated the effectiveness of a training program to teach behavior analysts to utilize an open family interview format. the study was conducted at an autism treatment program. a pre-post treatment design with in vivo simulation probes before and after training was used to assess the effects of the workshop on the participants and parents’ verbal behavior. Results showed that rate of questions per minute and number of closed-ended questions decreased after training, the duration of interviews decreased after training, the number of closed-ended questions significantly decreased after training, and frequency of the discussion topic of child goals increased after training. in general, interviewer responses varied. Preliminary data and parent questionnaire responses suggested parents were comfortable with the new interview format and felt the behavior analyst understood cultural and family needs.
Date: May 2012
Creator: Thompson, Megan Jennifer
Partner: UNT Libraries

“Valentine’s Day” and Other Works

Description: The following collection includes three short stories and two essays compiled with a critical preface. “Valentine’s Day” explores the limits of friendship and love in various situations including, two road trips (one fictional and one factual), pet ownership, and the impersonations of Frank Sinatra.
Date: May 2012
Creator: Thornburg, Chrissie
Partner: UNT Libraries

Charlotte Perkins Gilman: Naturalist Playwright

Description: This study explores Charlotte Perkins Gilman’s use of the dramatic form to challenge Herbert Spencer’s social Darwinism by offering feminist adaptations of Darwin’s theories of natural and sexual selection. As she does in her career-defining manifesto, Women & Economics (1898), Gilman in her lesser-known plays deploys her own brand of reform Darwinism to serve the feminist cause. Despite her absence in histories of modern drama, Gilman actively participated in the establishment and development of this literary, historical, and cultural movement. After situating Gilman in the context of nineteenth-century naturalist theater, this thesis examines two short dramatic dialogues she published in 1890, “The Quarrel,” and “Dame Nature Interviewed,” as well as two full-length plays, Interrupted (1909) and the Balsam Fir (1910). These plays demonstrate Gilman’s efforts to use the dramatic form in her early plays to “rehearse” for Women & Economics, and in her later drama, to “stage” the theories she presents in that book.
Date: May 2012
Creator: Tolle, Andrew
Partner: UNT Libraries

Uniting Commedia Dell’arte Traditions with the Spieltenor Repertoire

Description: Sixteenth century commedia dell’arte actors relied on gaudy costumes, physical humor and improvisation to entertain audiences. the Spieltenor in the modern operatic repertoire has a similar comedic role. Would today’s Spieltenor benefit from consulting the commedia dell’arte’s traditions? to answer this question, I examine the commedia dell’arte’s history, stock characters and performance traditions of early troupes. the Spieltenor is discussed in terms of vocal pedagogy and the fach system. I reference critical studies of the commedia dell’arte, sources on improvisatory acting, articles on theatrical masks and costuming, the commedia dell’arte as depicted by visual artists, commedia dell’arte techniques of movement, stances and postures. in addition, I cite vocal pedagogy articles, operatic repertoire and sources on the fach system. My findings suggest that a valid relationship exists between the commedia dell’arte stock characters and the Spieltenor roles in the operatic repertoire. I present five case studies, pairing five stock characters with five Spieltenor roles. Suggestions are provided to enhance the visual, physical and dramatic elements of each role’s performance. I conclude that linking a commedia dell’arte stock character to any Spieltenor role on the basis of shared traits offers an untapped resource to create distinctive characterizations based on theatrical traditions.
Date: May 2012
Creator: Trahan, Corey
Partner: UNT Libraries

The Impact of Music on the Shopping Behaviors of Generation Y Consumers in a College Campus Bookstore

Description: The purpose of this study was to identify the effect of background music in a retail setting on Generation Y students’ shopping behaviors by using the Mehrabian-Russell environmental psychology model. the study examined the impact of genre, volume, and song familiarity on purchase intention, as well as whether these musical factors would produce a change in mood. the influence of involvement with shopping on in-store music was also examined. a total of 251 students completed pre- and post-shopping surveys at the University of North Texas’ Follett Bookstore. Participants were all between 18 and 35 years of age (Generation Y). the surveys aimed to capture the participants’ entry and exit mood as well as information such as level of shopping involvement and intentions, musical awareness, overall shopping experience, and basic demographics. a positive mood change was found between entry and exit among those who were somewhat familiar and not at all familiar with the music, and entry mood affected overall shopping experience. There was a positive correlation between exit mood and the overall experience, and a negative correlation between exit mood and the amount of money spent.
Date: May 2012
Creator: Turner, Lindsey Jean
Partner: UNT Libraries

Web Content Authorship: Academic Librarians in Web Content Management

Description: An increasing number of libraries and information centers are using content management (CM) applications to develop, redesign, and maintain their websites. the purpose of this research was to provide understanding of attitudes of academic librarians about how their utilization of CM technology influences the information services they provide at the academic library’s website and to examine their perceptions of how using CM affects the creation of the web content. This research applied a qualitative research design (electronic survey and in-depth semi-structured interviews of academic subject librarians) with elements of a quantitative approach. the study discussed the concept of web authorship and supplied fundamentals for future theoretical research about authorship in web content development at academic libraries. the study provided an overview of CM at academic libraries and explored characteristics of dynamic content and semantic web applications at their websites. It discussed librarians’ opinions about issues of migration to the new content management system (CMS), factors affecting its efficient employment, and roles of librarians in web content management. Results of this study will serve to future research on management behavior of academic librarians authoring web content with the help of CM. the findings about the difficulties observed in the use of CMS and solutions, influence of training and learning, importance of cooperation and communication, adjustment of the CMS to the users’ needs, qualifications and skills needed in application of CM, distribution of responsibilities in the use of CMS, features of the CMS, and requirements to its functionality will have implications for academic and other libraries applying CM.
Date: May 2012
Creator: Vassilieva, Elena
Partner: UNT Libraries

The Development of Anti-submarine Warfare in the Mediterranean: the American Contribution and the Bombardment of Durazzo

Description: The Entente powers began World War I without any formal anti-submarine countermeasures. However, the Entente developed countermeasures through trial and error over time. Success was moderate until America joined the war. with America came the arrival of subchasers to the Mediterranean Theater of Operations. This highly specialized vessel helped turn the tide against U-boats. a true counter to the U-boat threat in the Mediterranean did not come until October 2, 1918 with the bombardment of Durazzo. This thesis discusses the development of Entente anti-submarine capabilities and illustrate how America's contribution led to success. a detailed analysis of the rarely discussed bombardment of Durazzo is included using archival documents.
Date: May 2012
Creator: Vaughan, Evan Michael
Partner: UNT Libraries

The Collective Pedagogy Utilized By the Trombone Instructors at the Rotterdam Conservatory of the Netherlands

Description: The Collective Pedagogy Utilized by the Trombone Instructors at the Rotterdam Conservatory of the Netherlands offers a comprehensive study of the collaboration between the various instructors of the trombone studio within the Rotterdam Conservatory and their pedagogical approach to curriculum, lesson structure, grading process, student body, and social environment. the Rotterdam Conservatory has produced some of the finest trombonists in the global music community. Alumni from the conservatory consistently win positions in professional ensembles, succeed in national and international competitions, and are often featured artists at international music festivals. the success of their alumni warrants closer scrutiny of the pedagogical approach utilized by the faculty of the conservatory.
Date: May 2012
Creator: Wallace, Noel James
Partner: UNT Libraries

Early Literacy of Young Children in New Immigrant and Native Families in Taiwan: Educational and Socio-political Implications

Description: Because of shifting demographics, the Taiwanese government opened the country to immigrants from Southeast Asia. Foreign-born brides of Taiwanese men have contributed significantly to this trend of new immigration, inspiring fears that their children, inadequately prepared for the literacy requirements of early education, might negatively impact the educational system and society. to better understand the socio-political implications of this cultural shift, the researcher gathered data from one hundred and twenty immigrant and native families with first graders in six major cities in Taiwan. Purposes of this research are to: (a) investigate to what extent, if any parenting style is impacted by differences in immigration status between native Taiwanese and Southeast Asian immigrant mothers, (b) examine to what extent, if any maternal parenting styles relate to children’s early literacy, and (c) determine to what extent, if any maternal parenting styles along with the children’s and familial characteristics associate with children’s early literacy. the study found that (a) immigrant mothers are statistically lower on authoritative and higher on permissive parenting style than native mothers; (b) immigrant mothers’ participation in integration programs does not relate to maternal parenting styles or children’s literacy performances; (c) children from immigrant families are significantly lower than their peers from native families on receptive vocabulary and phonological awareness; (d) children from higher income families perform better on receptive vocabulary than their lower income peers; (e) children whose mothers are senior high school graduates achieve significantly better on literacy skills than others. Furthermore, children of mothers with higher education perform better on receptive vocabulary than those whose mothers have lower education levels; (f) there was little relationship between children’s literacy development and the three maternal parenting styles; (g) age and gender are the most significant predictors of children’s literacy development. the limited influence of parenting styles on childhood literacy ...
Date: May 2012
Creator: Wang, Hui-Fen
Partner: UNT Libraries

Experimental Determination of L, Ostwald Solubility Solute Descriptor for Illegal Drugs By Gas Chromatography and Analysis By the Abraham Model

Description: The experiment successfully established the mathematical correlations between the logarithm of retention time of illegal drugs with GC system and the solute descriptor L from the Abraham model. the experiment used the method of Gas Chromatography to analyze the samples of illegal drugs and obtain the retention time of each one. Using the Abraham model to calculate and analyze the sorption coefficient of illegal drugs is an effective way to estimate the drugs. Comparison of the experimental data and calculated data shows that the Abraham linear free energy relationship (LFER) model predicts retention behavior reasonably well for most compounds. It can calculate the solute descriptors of illegal drugs from the retention time of GC system. However, the illegal drugs chosen for this experiment were not all ideal for GC analysis. HPLC is the optimal instrument and will be used for future work. HPLC analysis of the illegal drug compounds will allow for the determination of all the solute descriptors allowing one to predict the illegal drugs behavior in various Abraham biological and medical equations. the results can be applied to predict the properties in biological and medical research which the data is difficult to measure. the Abraham model will predict more accurate results by increasing the samples with effective functional groups.
Date: May 2012
Creator: Wang, Zhouxing
Partner: UNT Libraries

Examining Visual Art Experiences for Relationship Building in Shared-site Locations

Description: This study explored the perceptions of 74 activity directors responsible for the intergenerational programming that is currently taking place at shared-sites, facilities where older adults and young people receive services and programs simultaneously in a co-located space. Data for this study was collected through a national survey of 149 shared-sites collected from the Generations United data base. the questionnaire asked respondents about their facility’s intergenerational programming, demographic information, and perceived sense of community exhibited by participants in the intergenerational program. Descriptive data regarding the location, primary emphasis, ages and number served, and specific program characteristics, including visual art programming, at IGSS facilities were collected and analyzed. Results from the analysis were reported with limitations. There was a statistical significance suggested in the association of the frequency and duration of art activities with some of the sense of community variables. the study is valuable in determining the current demographics of IGSS facilities that offer visual art programs. Further research needs to be conducted to answer questions regarding the specific role that the visual arts play in creating a sense of community among intergenerational participants at shared-site facilities.
Date: May 2012
Creator: Whiteland, Susan
Partner: UNT Libraries

Personalities and Pipelines: Exploring the Role of Personality in Student Self-selection Into Stem Majors

Description: Despite all the national efforts to increase STEM enrollment in the United States, the gap between the U.S. and other developed countries in terms of STEM graduates has widened over the last 20 years. Researchers have studied factors such as gender, race, high school GPA, and the student’s socioeconomic status for their impact on STEM enrollment. This study offers another possible explanation of why students might choose, or not choose, to enroll in STEM majors by examining the relationship between personality and STEM enrollment. the sample included 2,745 respondents to the 2008 Cooperative Institutional Research Program freshman survey at a large research university in the southwestern United States. Factor analysis was used to create four personality scales, based on John Holland’s theory of personality types, with items selected from the survey. Logistic regression was utilized to answer three research questions: Are students classified as a strong investigative personality type more likely to enroll in STEM majors than students classified as a weak investigative personality type? Are there differences in their likelihood to enroll in STEM majors among students of investigative-social, investigative-artistic, and investigative-enterprising personality types? What effect does personality have on students’ self-selection into a biological versus a physical STEM major? Results suggested that students with a combined investigative and social personality were more likely to enroll in STEM majors whereas students with a combined investigative and artistic personality were less likely to do so. Additionally, STEM students with an enterprising personality were more likely to choose a biological STEM major than a physical STEM major. These results should benefit educators and policy makers who seek to strengthen the pipeline into STEM fields.
Date: May 2012
Creator: Simpson, Patricia
Partner: UNT Libraries

Predictors of College Readiness: an Analysis of the Student Readiness Inventory

Description: The purpose of this study was to better predict how a first semester college freshman becomes prepared for college. the theoretical framework guiding this study is Vrooms’ expectancy theory, motivation plays a key role in success. This study used a hierarchical multiple regression model. the independent variables of interest included high school percentile class rank, composite ACT scores, composite SAT scores, and the 10 themes as measured by the Student Readiness Inventory (SRI) to address two research questions: What are the psychosocial factors identified by the SRI are most relevant in predicting college success? What conventional academic indicators are most relevant in predicting college success? the sample size for this study was 5279 (n), including a stratified random sample of first semester college freshman enrolled in credit bearing courses; these participants were deemed college ready by the university. Academic Discipline accounted for 4.2% of the variance in first semester college GPA, General Determination accounted for 1.7% of the variance, and the remaining psychosocial factors of the SRI accounted for less than 1% of the variance. High school percentile class rank accounted for 10.7% of the variance, composite ACT accounted for 5.9% of the variance, and composite SAT accounted for 5.6% of the variance. Future analysis could be completed within demographic groups to include a stratified random sample of participants by ethnicity, gender, or economic status. Such analysis would build on this body of research providing additional guidance admission officers and K-12 educators.
Date: May 2012
Creator: Wilson III, James K.
Partner: UNT Libraries