Browsing by Subject "Statistics"
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Item Analyzing Topical Structure in ESL Essays: Not All Topics are Equal(Copyright © Cambridge University Press [BREAK]The original doi for the as-published version of the article is 10.1017/S0272263100009517. To access the doi, open the following DOI site in your browser and cut and paste the doi name where indicated: [LINK]http://dx.doi.org[/LINK][BREAK]Access to the original article may require subscription and authorized logon ID/password. IUPUI faculty/staff/students please check University Library resources before purchasing an article. Questions on finding the original article via our databases? Ask a librarian: [LINK]http://www.ulib.iupui.edu/research/askalibrarian[/LINK]., 1990) Schneider, Melanie; Connor, Ulla, 1948-Topical structure analysis (TSA), a text-based approach to the study of topic in discourse, has been useful in identifying text-based features of coherence. It has also been used to distinguish between essays written by groups of native English speakers with varying degrees of writing proficiency (Witte, 1983a, 1983b). More recently, TSA has distinguished between higher and lower rated ESL essays, but with different results from those found with native speakers of English (Connor & Schneider, 1988). The present study replicated the previous ESL study of two groups of essays written for the TOEFL Test of Written English with three groups of essays. Findings indicate that two topical structure variables, proportions of sequential and parallel topics in the essays, differentiate the highest rated group from the two lower rated groups. We offer explanations for the results and propose that all occurrences of a particular type of topic progression do not contribute equally to the coherence of a text.Item The Million Dollar List - Methodology and Summary Statistics October 2011(2011-10) Osili, UnaCharitable giving by high net worth households is an area of interest for scholars, practitioners, and donors. Research shows that high net worth donors contribute a disproportionately high share of all philanthropic dollars (Havens & Schervish, 2001 ; Havens, O‟Herlihy, & Schervish, 2006). However, little is known about patterns in high net worth giving. Scholars continue to investigate the characteristics of high net worth giving and high net worth donors in an effort to better understand how and why this subset of donors contribute their time and money.Item Modelling care quality for patients after a transient ischaemic attack within the US Veterans Health Administration(2019-11) Arling, Greg; Sico, Jason J.; Reeves, Mathew J.; Myers, Laura; Baye, Fitsum; Bravata, Dawn M.; Biostatistics, School of Public HealthObjective Timely preventive care can substantially reduce risk of recurrent vascular events or death after a transient ischaemic attack (TIA). Our objective was to understand patient and facility factors influencing preventive care quality for patients with TIA in the US Veterans Health Administration (VHA). Methods We analysed administrative data from a retrospective cohort of 3052 patients with TIA cared for in the emergency department (ED) or inpatient setting in 110 VHA facilities from October 2010 to September 2011. A composite quality indicator (QI score) pass rate was constructed from four process-related quality measures—carotid imaging, brain imaging, high or moderate potency statin and antithrombotic medication, associated with the ED visit or inpatient admission after the TIA. We tested a multilevel structural equation model where facility and patient characteristics, inpatient admission, and neurological consultation were predictors of the resident’s composite QI score. Results Presenting with a speech deficit and higher Charlson Comorbidity Index (CCI) were positively related to inpatient admission. Being admitted increased the likelihood of neurology consultation, whereas history of dementia, weekend arrival and a higher CCI score made neurological consultation less likely. Speech deficit, higher CCI, inpatient admission and neurological consultation had direct positive effects on the composite quality score. Patients in facilities with fewer full-time equivalent neurology staff were less likely to be admitted or to have a neurology consultation. Facilities having greater organisational complexity and with a VHA stroke centre designation were more likely to provide a neurology consultation. Conclusions Better TIA preventive care could be achieved through increased inpatient admissions, or through enhanced neurology and other care resources in the ED and during follow-up care.Item Opening Interlibrary Loan to Open Access: Locating and Managing Borrowing Requests for Open Access Materials(2011-09-21) Baich, TinaEven though open access materials are freely available on the internet, library users still request them through interlibrary loan. In 2009, IUPUI University Library began tracking borrowing requests for open access materials. As the number of requests filled with open access documents continues to grow, IUPUI University Library is able to provide a service to users and cost savings for the library by utilizing this material. In this presentation, I will discuss the data regarding IUPUI University Library open access borrowing requests and demonstrate some of the most commonly used online resources for locating open access materials. I will also discuss how IUPUI University Library tracks requests for open access materials and notifies library users of availability.Item Preparing Students for Success on Examinations: Readiness Assurance Tests in a Graduate-Level Statistics Course(Healio, 2016-01) Bartlett Ellis, Rebecca J.; Carter-Harris, Lisa; MacLaughlin, Pam; School of NursingFormative feedback is one way to foster students' readiness for statistics examinations. The use of Readiness Assurance Tests was examined as an educational intervention in which feedback was provided for both correct and incorrect responses in a graduate-level statistics course. Examination scores in the intervention group ( n = 56) were compared with those in a control group ( n = 42). Intervention group examination scores significantly improved from 75.92 ± 14.52 on the Readiness Assurance Test to 90.06 ± 7.06, p < .001, on the midterm, and final examination scores improved from 78.23 ± 17.29 to 85.6 ± 6.98, p = .002. Intervention group midterm scores were significantly higher than those of the control group (90.06 ± 7.06 versus 79.7 ± 11.6, p < .001); however, no differences were found between the groups on the final examination (85.35 ± 9.46 versus 85.6 ± 6.98, p = .91). Use of Readiness Assurance Tests was an effective modality to increase student self-efficacy, learning experience, and, relative to a control group, midterm examination performance in statisticsItem Promotion and tenure for community-engaged research: An examination of promotion and tenure support for community-engaged research at three universities collaborating through a Clinical and Translational Science Award(http://dx.doi.org/10.1111/cts.12061, 2013-06-06) Marrero, David G.; Hardwick, Emily J.; Staten, Lisa K.; Savaiano, Dennis A.; Odell, Jere D.; Frederickson, Karen; Saha, ChandanIntroduction. Community engaged health research, an approach to research which includes the participation of communities, promotes the translation of research to address and improve social determinants of health. As a way to encourage community engaged research, the National Institutes of Health required applicants to the Clinical and Translational Science Award (CTSA) to include a community engagement component. Although grant-funding may support an increase in community engaged research, faculty also respond to the rewards and demands of university promotion and tenure standards. This paper measures faculty perception of how three institutions funded by a CTSA support community engaged research in the promotion and tenure process. Methods: At three institutions funded by a CTSA, tenure track and non-tenure track faculty responded to a survey regarding perceptions of how promotion and tenure committees value community engaged research. Results: Faculty view support for community engaged research with some reserve. Only 36% agree that community engaged research is valued in the promotion and tenure process. Discussion: Encouraging community engaged scholarship requires changing the culture and values behind promotion and tenure decisions. Institutions will increase community engaged research and more faculty will adopt its principles, when it is rewarded by promotion and tenure committees.Item Pubertal Onset in HIV-infected Children in the Era of Combination Antiretroviral Treatment(Wolters Kluwer, 2013) Williams, Paige L.; Abzug, Mark J.; Jacobson, Denise L.; Wang, Jiajia; Van Dyke, Russell B.; Hazra, Rohan; Patel, Kunjal; Dimeglio, Linda A.; McFarland, Elizabeth J.; Silio, Margarita; Borkowsky, William; Seage, George R.; Oleske, James M.; Geffner, Mitchell E.; International Maternal Pediatric and Adolescent AIDS Clinical Trials P219219C Study; Pediatric HIVAIDS Cohort Study; Pediatrics, School of MedicineObjective: To evaluate associations of perinatal HIV infection, HIV disease severity, and combination antiretroviral treatment with age at pubertal onset. Design: Analysis of data from two US longitudinal cohort studies (IMPAACT 219C and PHACS AMP), conducted during 2000-2012, including perinatally HIV-infected (PHIV) and HIV-exposed but uninfected (HEU) youth. Tanner stage assessments of pubertal status (breast and pubic hair in girls; genitalia and pubic hair in boys) were conducted annually. Methods: We compared the timing of pubertal onset (Tanner stage ≥2) between PHIV and HEU youth using interval-censored models. For PHIV youth, we evaluated associations of HIV disease severity and combination antiretroviral treatment with age at pubertal onset, adjusting for race/ethnicity and birth cohort. Results: The mean age at pubertal onset was significantly later for the 2086 PHIV youth compared to the 453 HEU children (10.3 vs. 9.6, 10.5 vs. 10.0, 11.3 vs. 10.4, and 11.5 vs. 10.7 years according to female breast, female pubic hair, male genitalia, and male pubic hair staging, respectively, all P < 0.001). PHIV youth with HIV-1 RNA viral load above 10, 000 copies/ml (vs. ≤10, 000 copies/ml) or CD4% below 15% (vs. ≥15%) had significantly later pubertal onset (by 4-13 months). Each additional year of combination antiretroviral treatment was associated with a 0.6-1.2-month earlier mean age at pubertal onset, but this trend did not persist after adjustment for birth cohort. Conclusion: Pubertal onset occurs significantly later in PHIV than in HEU youth, especially among those with more severe HIV disease. However, in the current era, combination antiretroviral treatment may result in more normal timing of pubertal onset.Item Secure data aggregation protocol for sensor networks(2015-02-20) Shah, Kavit; King, Brian; El-Sharkawy, Mohammed; Salama, PaulWe propose a secure in-network data aggregation protocol with internal verification, to gain increase in the lifespan of the network by preserving bandwidth. For doing secure internal distributed operations, we show an algorithm for securely computing the sum of sensor readings in the network. Our algorithm can be generalized to any random tree topology and can be applied to any combination of mathematical functions. In addition, we represent an efficient way of doing statistical analysis for the protocol. Furthermore, we propose a novel, distributed and interactive algorithm to trace down the adversary and remove it from the network. Finally, we do bandwidth analysis of the protocol and give the proof for the efficiency of the protocol.Item When it comes to baseball’s ethnic tensions, the problems run deeper than bat flips(The Conversation US, Inc., 2015-10-19) Lamb, Chris; Journalism and Public Relations, School of Liberal Arts