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2007

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Articles 3781 - 3810 of 8953

Full-Text Articles in Social and Behavioral Sciences

Adapting & Evolving: Mapping New Routes, Kate Seago, Mary Beth Thomson May 2007

Adapting & Evolving: Mapping New Routes, Kate Seago, Mary Beth Thomson

Library Presentations

No abstract provided.

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Ordinal Versions Of Coefficients Alpha And Theta For Likert Rating Scales, Bruno D. Zumbo, Anne M. Gadermann, Cornelia Zeisser May 2007

Ordinal Versions Of Coefficients Alpha And Theta For Likert Rating Scales, Bruno D. Zumbo, Anne M. Gadermann, Cornelia Zeisser

Journal of Modern Applied Statistical Methods

Two new reliability indices, ordinal coefficient alpha and ordinal coefficient theta, are introduced. A simulation study was conducted in order to compare the new ordinal reliability estimates to each other and to coefficient alpha with Likert data. Results indicate that ordinal coefficients alpha and theta are consistently suitable estimates of the theoretical reliability, regardless of the magnitude of the theoretical reliability, the number of scale points, and the skewness of the scale point distributions. In contrast, coefficient alpha is in general a negatively biased estimate of reliability. The use of ordinal coefficients alpha and theta as alternatives to coefficient alpha …

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Lq-Moments For Statistical Analysis Of Extreme Events, Ani Shabri, Abdul Aziz Jemain May 2007

Lq-Moments For Statistical Analysis Of Extreme Events, Ani Shabri, Abdul Aziz Jemain

Journal of Modern Applied Statistical Methods

Statistical analysis of extremes is conducted for predicting large return periods events. LQ-moments that are based on linear combinations are reviewed for characterizing the upper quantiles of distributions and larger events in data. The LQ-moments method is presented based on a new quick estimator using five points quantiles and the weighted kernel estimator to estimate the parameters of the generalized extreme value (GEV) distribution. Monte Carlo methods illustrate the performance of LQ-moments in fitting the GEV distribution to both GEV and non-GEV samples. The proposed estimators of the GEV distribution were compared with conventional L-moments and LQ-moments based on linear …

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Jmasm 26: Hettmansperger And Mckean Linear Model Aligned Rank Test For The Single Covariate And One-Way Ancova Case (Sas), Paul A. Nakonezny, Robert D. Shull May 2007

Jmasm 26: Hettmansperger And Mckean Linear Model Aligned Rank Test For The Single Covariate And One-Way Ancova Case (Sas), Paul A. Nakonezny, Robert D. Shull

Journal of Modern Applied Statistical Methods

A SAS program (SAS 9.1.3 release, SAS Institute, Cary, N.C.) is presented to implement the Hettmansperger and McKean (1983) linear model aligned rank test (nonparametric ANCOVA) for the single covariate and one-way ANCOVA case. As part of this program, SAS code is also provided to derive the residuals from the regression of Y on X (which is step 1 in the Hettmansperger and McKean procedure) using either ordinary least squares regression (proc reg in SAS) or robust regression with MM estimation (proc robustreg in SAS).

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Reliability And Statistical Power: How Measurement Fallibility Affects Power And Required Sample Sizes For Several Parametric And Nonparametric Statistics, Gibbs Y. Kanyongo, Gordon P. Brook, Lydia Kyei-Blankson, Gulsah Gocmen May 2007

Reliability And Statistical Power: How Measurement Fallibility Affects Power And Required Sample Sizes For Several Parametric And Nonparametric Statistics, Gibbs Y. Kanyongo, Gordon P. Brook, Lydia Kyei-Blankson, Gulsah Gocmen

Journal of Modern Applied Statistical Methods

The relationship between reliability and statistical power is considered, and tables that account for reduced reliability are presented. A series of Monte Carlo experiments were conducted to determine the effect of changes in reliability on parametric and nonparametric statistical methods, including the paired samples dependent t test, pooled-variance independent t test, one-way analysis of variance with three levels, Wilcoxon signed-rank test for paired samples, and Mann-Whitney-Wilcoxon test for independent groups. Power tables were created that illustrate the reduction in statistical power from decreased reliability for given sample sizes. Sample size tables were created to provide the approximate sample sizes required …

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On Flexible Tests Of Independence And Homoscedasticity, Rand R. Wilcox May 2007

On Flexible Tests Of Independence And Homoscedasticity, Rand R. Wilcox

Journal of Modern Applied Statistical Methods

Consider the nonparametric regression model Y = m(X) + τ(X)ε , where X and ε are independent random variables, ε has a mean of zero and variance σ2, τ is some unknown function used to model heteroscedasticity, and m(X) is an unknown function reflecting some conditional measure of location associated with Y, given X. Detecting dependence, by testing the hypothesis that m(X) does not vary with X, has the potential of being more sensitive to a wider range of associations compared to using Pearson's correlation. This note has two goals. The first is to point …

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Using The Fractional Imputation Methodology To Evaluate Variance Due To Hot Deck Imputation In Survey Data, Adriana Pérez May 2007

Using The Fractional Imputation Methodology To Evaluate Variance Due To Hot Deck Imputation In Survey Data, Adriana Pérez

Journal of Modern Applied Statistical Methods

This article examines empirically the effect on the variance estimate due to the use of hot deck imputation with a nearest neighbor donor in comparison with the pairwise fractional hot deck imputation methodology in the 1999 Survey of Doctorate Recipients.

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A Comparison Of Eight Shrinkage Formulas Under Extreme Conditions, David A. Walker May 2007

A Comparison Of Eight Shrinkage Formulas Under Extreme Conditions, David A. Walker

Journal of Modern Applied Statistical Methods

The performance of various shrinkage formulas for estimating the population squared multiple correlation coefficient (ρ2) were compared under extreme conditions often found in educational research with small sample sizes of 10, 15, 20, 25, 30 and regressor variates ranging from 2 to 4. A new formula for estimating ρ2, Adj R2 DW, was examined in terms of its performance under various conditions of N, p, ρ2, along with its bias properties and standard error estimates. The two shrinkage formulas that performed most consistently were the Claudy (Adj R2 C) and Walker (Adj R2 DW)

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Examining Cronbach Alpha, Theta, Omega Reliability Coefficients According To Sample Size, Ilker Ercan, Berna Yazici, Deniz Sigirli, Bulent Ediz, Ismet Kan May 2007

Examining Cronbach Alpha, Theta, Omega Reliability Coefficients According To Sample Size, Ilker Ercan, Berna Yazici, Deniz Sigirli, Bulent Ediz, Ismet Kan

Journal of Modern Applied Statistical Methods

Differentiations according to the sample size of different reliability coefficients are examined. It is concluded that the estimates obtained by Cronbach alpha and teta coefficients are not related with the sample size, even the estimates obtained from the small samples can represent the population parameter. However, the Omega coefficient requires large sample sizes.

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Analyses Of Unbalanced Groups-Versus-Individual Research Designs Using Three Alternative Approximate Degrees Of Freedom Tests: Test Development And Type I Error Rates, Stephanie Wehry, James Algina May 2007

Analyses Of Unbalanced Groups-Versus-Individual Research Designs Using Three Alternative Approximate Degrees Of Freedom Tests: Test Development And Type I Error Rates, Stephanie Wehry, James Algina

Journal of Modern Applied Statistical Methods

Three approximate degrees of freedom quasi-F tests of treatment effectiveness were developed for use in research designs when one treatment is individually delivered and the other is delivered to individuals nested in groups of unequal size. Imbalance in the data was studied from the prospective of subject attrition. The results indicated the test that best controls the Type I error rate depends on the number of groups in the group-administered treatment but does not depend on the subject attrition rates included in the study.

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Another Look At The Confidence Intervals For The Noncentral T Distribution, Bruno Lecoutre May 2007

Another Look At The Confidence Intervals For The Noncentral T Distribution, Bruno Lecoutre

Journal of Modern Applied Statistical Methods

An alternative approach to the computation of confidence intervals for the noncentrality parameter of the Noncentral t distribution is proposed. It involves the percent points of a statistical distribution. This conceptual improvement renders the technical process for deriving the limits more comprehensible. Accurate approximations can be derived and easily used.

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Better Binomial Confidence Intervals, James F. Reed Iii May 2007

Better Binomial Confidence Intervals, James F. Reed Iii

Journal of Modern Applied Statistical Methods

The construction of a confidence interval for a binomial parameter is a basic analysis in statistical inference. Most introductory statistics textbook authors present the binomial confidence interval based on the asymptotic normality of the sample proportion and estimating the standard error - the Wald method. For the one sample binomial confidence interval the Clopper-Pearson exact method has been regarded as definitive as it eliminates both overshoot and zero width intervals. The Clopper-Pearson exact method is the most conservative and is unquestionably a better alternative to the Wald method. Other viable alternatives include Wilson's Score, the Agresti-Coull method, and the Borkowf …

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A Spline-Based Lack-Of-Fit Test For Independent Variable Effect, Chin-Shang Li, Wanzhu Tu May 2007

A Spline-Based Lack-Of-Fit Test For Independent Variable Effect, Chin-Shang Li, Wanzhu Tu

Journal of Modern Applied Statistical Methods

In regression analysis of count data, independent variables are often modeled by their linear effects under the assumption of log-linearity. In reality, the validity of such an assumption is rarely tested, and its use is at times unjustifiable. A lack-of-fit test is proposed for the adequacy of a postulated functional form of an independent variable within the framework of semiparametric Poisson regression models based on penalized splines. It offers added flexibility in accommodating the potentially non-loglinear effect of the independent variable. A likelihood ratio test is constructed for the adequacy of the postulated parametric form, for example log-linearity, of the …

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A Comparison Of One-High-Threshold And Two-High-Threshold Multinomial Models Of Source Monitoring, Mahesh Menon, Todd S. Woodward May 2007

A Comparison Of One-High-Threshold And Two-High-Threshold Multinomial Models Of Source Monitoring, Mahesh Menon, Todd S. Woodward

Journal of Modern Applied Statistical Methods

A data simulation study comparing the one-high-threshold (1HT) and two-high-threshold (2HT) multinomial models suggested that 2HT models are more likely to misestimate the underlying parameter values, due to inflation of some parameters (b and d), and deflation of others (D).

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Multinomial Logistic Regression Model For The Inferential Risk Age Groups For Infection Caused By Vibrio Cholerae In Kolkata, India, Krishnan Rajendran, Thandavarayan Ramamurthy, Dipika Sur May 2007

Multinomial Logistic Regression Model For The Inferential Risk Age Groups For Infection Caused By Vibrio Cholerae In Kolkata, India, Krishnan Rajendran, Thandavarayan Ramamurthy, Dipika Sur

Journal of Modern Applied Statistical Methods

Multinomial Logistic Regression (MLR) modeling is an effective approach for categorical outcomes, as compared with discriminant function analysis and log-linear models for profiling individual category of dependent variable. To explore the yearly change of inferential age groups of acute diarrhoeal patients infected with Vibrio cholerae during 1996-2000 by MLR, systematic sampling data were generated from an active surveillance study. Among 1330 V.cholerae infected cases, the predominant age category was up to 5 years accounting for 478 (30.5%) cases. The independent variables V.cholerae O1 (p<0.001) and non-O1 and non-O139 (p < 0.001) were significantly associated with children under 5 years age group. V.cholerae O139 inferential age group was > 40 years. The infection mediated by V.cholerae O1 had significantly decreasing trend Exp(B) year wise from …

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Estimation Of Risk For Developing Cardiac Problem In Patients Of Type 2 Diabetes As Obtained By The Technique Of Density Estimation, Ajit Mukherjee, Ajit Mathur, Rakesh Mittal May 2007

Estimation Of Risk For Developing Cardiac Problem In Patients Of Type 2 Diabetes As Obtained By The Technique Of Density Estimation, Ajit Mukherjee, Ajit Mathur, Rakesh Mittal

Journal of Modern Applied Statistical Methods

High levels of cholesterol and triglyceride are known to be strongly associated with development of cardiac problem in patients of type 2 diabetes. In a hospital-based study, patients showing ECG positive were compared with those who were not. The observations on cholesterol and triglyceride were considered for estimation of risk for developing the cardiac problem. The technique of density estimation employing Epanechnikov kernel was used for estimating bivariate probability density functions with respect to observations on cholesterol and triglyceride of the two groups. Using the odds form of Bayes’ rule, the estimates of posterior odds were computed.

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Rhode Island Current Conditions Index — May 2007, Leonard Lardaro May 2007

Rhode Island Current Conditions Index — May 2007, Leonard Lardaro

The Rhode Island Current Conditions Index

No abstract provided.

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The Open Archives Initiative, Michael L. Nelson May 2007

The Open Archives Initiative, Michael L. Nelson

Computer Science Presentations

PDF of a powerpoint presentation from the Open Archives Initiative DRIADE ( Digital Repository of Information and Data for Evolution) Workshop, Durham, North Carolina, May 16-17, 2007. Also available on Slideshare.

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Spartan Daily, May 1, 2007, San Jose State University, School Of Journalism And Mass Communications May 2007

Spartan Daily, May 1, 2007, San Jose State University, School Of Journalism And Mass Communications

Spartan Daily (School of Journalism and Mass Communications)

Volume 128, Issue 50

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The Evolution Of School Choice Consumers: Parent And Student Voices On The Second Year Of The D.C. Opportunity Scholarship Program, Stephen Q. Cornman, Thomas Stewart, Patrick J. Wolf May 2007

The Evolution Of School Choice Consumers: Parent And Student Voices On The Second Year Of The D.C. Opportunity Scholarship Program, Stephen Q. Cornman, Thomas Stewart, Patrick J. Wolf

School Choice Demonstration Project

In the 50 years since economist Milton Friedman published "The Role of Government in Education"1 scholars and policy makers have been debating how parental choice through market mechanisms can and does operate in education. Market "optimists" argue that education is a service that can be produced under a variety of arrangements and that parents are natural education consumers.2 Market "pessimists" argue that education is a public good that should be produced in government-run schools, and that school choice programs suffer "market failure" because only advantaged families will have the resources and experience to choose effectively.3 These academic debates continue to …

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Noun-Sense: Short-Term Memory And Correct Recall Of Concrete, Abstract And Nonsense Words, Mindi E. Lovelady May 2007

Noun-Sense: Short-Term Memory And Correct Recall Of Concrete, Abstract And Nonsense Words, Mindi E. Lovelady

Undergraduate Psychology Research Methods Journal

Retrieval of items from short-term memory is a repeat phenomenon in an individual’s everyday life. Recall of some information from short-term memory is more readily available than others, but learning to maximize the amount of information that is retrieved is possible. Using retrieval techniques that involve word concreteness could be of utility in retrieval of information. 81 undergraduate participants were recruited at Lindenwood University. Each participant was asked to complete a task involving the STM recall of words from a list. The list incorporated concrete and abstract nouns, with nonsense words. Participants demonstrated, with significance, the ability to recall more …

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Torch (May/June 2007), Amy Homans, Civil Rights Team Project May 2007

Torch (May/June 2007), Amy Homans, Civil Rights Team Project

Torch: The Civil Rights Team Project Newsletter

No abstract provided.

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Information Outlook, May 2007, Special Libraries Association May 2007

Information Outlook, May 2007, Special Libraries Association

Information Outlook, 2007

Volume 11, Issue 5

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The Effects Of Child Sexual Abuse And Posttraumatic Stress On Levels Of Self-Efficacy, Lary L. Anderson May 2007

The Effects Of Child Sexual Abuse And Posttraumatic Stress On Levels Of Self-Efficacy, Lary L. Anderson

Graduate Theses

Sexually abused children often develop posttraumatic stress disorder, a distressing and potentially debilitating condition that renders children to feelings of helplessness. Past studies have explored these effects in adults concerning sexual abuse, health issues, war, and natural disaster but not much research has been done for children. This study examined childhood sexual abuse, PTSD, and the relation that exists with self-efficacy. Thirty-nine children, 7 males and 32 females, participated in the study. The ages ranged from age eight through age eighteen, with a mean age of 12.5. Each participant was tested for levels of PTSD, using the Trauma Check list …

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Communicating With Students Via E-Mail: Creating No Excuse For “There’S Nothing To Do On Campus”, Jessica Rusack May 2007

Communicating With Students Via E-Mail: Creating No Excuse For “There’S Nothing To Do On Campus”, Jessica Rusack

Senior Honors Projects

In the past decade, technology has transformed how society communicates. From the internet to cell phones to iPods and video games, interactive communication has become the norm. At the University of Rhode Island, students adapt quickly to the constantly changing technology. Yet student organizations and the University as a whole have not adapted as quickly to such changes. This has led to an uninformed and uninterested student body when it comes to programming and events on campus. As students instant message on their laptops and text message on their cell phones (simultaneously, of course), organizations, clubs and athletics struggle to …

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England, Nannie Rogers (Willett), 1878-1955 (Sc 1469), Manuscripts & Folklife Archives May 2007

England, Nannie Rogers (Willett), 1878-1955 (Sc 1469), Manuscripts & Folklife Archives

Manuscript Collection Finding Aids

Finding aid only for Manuscripts Small Collection 1469. Correspondence relating to the appointment of the postmaster in Lebanon, Kentucky. Nannie R. England and John B. Wathen were candidates for the position. The letters indicate the politics involved in postal appointments.

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Special Remembrance Of Barry Armandi, Bonita Betters-Reed May 2007

Special Remembrance Of Barry Armandi, Bonita Betters-Reed

Organization Management Journal

No abstract provided.

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Major Transitions At Omj!- A New Editor And A New Publisher, Bill Ferris May 2007

Major Transitions At Omj!- A New Editor And A New Publisher, Bill Ferris

Organization Management Journal

No abstract provided.

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Using Published Arbitration Decisions To Develop Teaching Examples, Cases And Exercises, Margaret A. Lucero May 2007

Using Published Arbitration Decisions To Develop Teaching Examples, Cases And Exercises, Margaret A. Lucero

Organization Management Journal

A sample of arbitration decisions are published every year on a wide variety of topics including workplace fighting, theft, insubordination, attendance problems, alcohol or drug abuse, and sexual harassment. These published cases provide interesting, timely, and complex examples of actual events. Using this material as a basis, unique, realistic cases and exercises can be developed to focus on many different workplace topics.

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Making A Difference: A Professional, Scholarly, And Engaged Eam, Eric H. Kessler May 2007

Making A Difference: A Professional, Scholarly, And Engaged Eam, Eric H. Kessler

Organization Management Journal

No abstract provided.

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