Creating a DIF Index---a Combination of DIF Measure, DIF Direction and DIF Impact on People PDF Download
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Author: Hequn Wang
Publisher:
ISBN:
Category : Discrimination in education
Languages : en
Pages : 304
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Book Description
Differential Item Functioning (dif) is a group-related item/test characteristic targeting the issue of item/test bias. In this dissertation, a new dif index is described that has three parts: (1) a dif measure indicating the degree of different (item) performances between the reference and focal groups, (2) a dif direction statement about the dif direction and the favored groups, etc., and (3) a descriptive statement about the impact of DIF--which and how many examinees are influenced by the dif item. For the dif measure, one method of significance detection is described and evaluated. Then, the dif index is applied to real data, and its results are compared to the results of other dif methods. Furthermore, an introduction is given to the extensions of the dif index to the test level and the polytomous item response data. Finally, some problems are evaluated and future developments are described in the discussion chapter. [The dissertation citations contained here are published with the permission of ProQuest llc. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.].
Author: Hequn Wang
Publisher:
ISBN:
Category : Discrimination in education
Languages : en
Pages : 304
Get Book Here
Book Description
Differential Item Functioning (dif) is a group-related item/test characteristic targeting the issue of item/test bias. In this dissertation, a new dif index is described that has three parts: (1) a dif measure indicating the degree of different (item) performances between the reference and focal groups, (2) a dif direction statement about the dif direction and the favored groups, etc., and (3) a descriptive statement about the impact of DIF--which and how many examinees are influenced by the dif item. For the dif measure, one method of significance detection is described and evaluated. Then, the dif index is applied to real data, and its results are compared to the results of other dif methods. Furthermore, an introduction is given to the extensions of the dif index to the test level and the polytomous item response data. Finally, some problems are evaluated and future developments are described in the discussion chapter. [The dissertation citations contained here are published with the permission of ProQuest llc. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.].
Author: Russell K. Schutt
Publisher: Pine Forge Press
ISBN: 1412999804
Category : Science
Languages : en
Pages : 649
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Book Description
A student-friendly textbook that introduces the most cutting-edge research methods applied to engaging social issues In this new Seventh Edition of his perennially successful social research text, author Russell K. Schutt, an award-winning researcher and teacher, continues to make research come alive through research stories that illustrate the methods presented in each chapter. Through numerous examples and hands-on exercises that help students learn by doing, Investigating the Social World, Seventh Edition helps readers understand research methods as an integrated whole. Readers will learn to appreciate the value of both qualitative and quantitative methodologies and understand the need to make ethical research decisions, while also learning about contemporary social issues like homelessness, drug abuse, disasters, and the effects of social networking on interpersonal relations.
Author: Hossein Karami
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
With the rising concerns over the fairness of language tests, Differential Item Functioning (DIF) has been increasingly applied in bias analysis. Despite its widespread use in psychometric circles, DIF is facing a number of serious problems. This paper is an attempt to shed light on a number of the issues involved in DIF analysis. Specifically, the paper is focused on four problems: (a) the inter-method indeterminacy, (b) the intra-method indeterminacy, (c) the ad hoc interpretations, and (d) the impact of DIF on validity. In order to orient the reader, the paper also provides a brief introduction to the fundamental concepts in DIF analysis.
Author: James D. Weese
Publisher:
ISBN:
Category :
Languages : en
Pages : 358
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Book Description
A standardized effect size for the SIBTEST/POLYSIBTEST procedure is proposed, allowing for Differential Item Functioning (DIF) to be classified with a single set of DIF heuristics regardless of whether data are dichotomous or polytomous. This proposed standardized effect size accounts for both variability in responses and whether participants are included in the SIBTEST/POLYSIBTEST calculations. First, a new set of unstandardized effect size heuristics are established for dichotomous data that are more aligned with Educational Testing Service (ETS) standards using two and three parameter logistic (2PL and 3PL) models. Second, a standardized effect size is proposed and compared to other DIF heuristics with SIBTEST in a variety of data conditions, with a set of standardized heuristics proposed for dichotomous data. Using the heuristics for the standardized effect size, the application is extended to polytomous data with comparisons made to other proposed DIF heuristics with POLYSIBTEST when there are three to seven item response options. The proposed standardized effect size has practical importance due to there not being an agreed upon way of classifying the magnitude of DIF present in polytomous items using POLYSIBTEST. The standardized effect size also provides a single set of DIF heuristics for classifying DIF in 2PL, 3PL, and graded response models; therefore, making it easier when researchers and practitioners are assessing items for DIF using a variety of scale formats.
Author: Barbara McPake
Publisher: Routledge
ISBN: 1134118309
Category : Business & Economics
Languages : en
Pages : 308
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Book Description
This third edition of Barbara McPake and Charles Normand’s textbook confirms it as providing the only properly international treatment of health economics on the market. A key tenet of the book is its analysis of comparative health systems across borders, and the text has been updated and revised to take account of changes in a host of countries. Barack Obama’s reforms in the United States are considered alongside the provision of healthcare in China, providing a unique overview of these different approaches. The introduction of performance related payment in various forms is appraised, with the experience of developing countries such as Cambodia, Rwanda and Uganda important in this regard. An overview of the range of mathematical techniques available to perform economic evaluation in healthcare is also introduced, although the text avoids becoming too technical. In all, the text builds on the success of the first edition and provides the perfect introduction to the fast changing world of health economics.
Author: Anne V. T. Whyte
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 128
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Book Description
Evaluates techniques for measuring environmental perception.
Author: Michael W. Kattan
Publisher: SAGE
ISBN: 1412953723
Category : Medical
Languages : en
Pages : 1281
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Book Description
The Encyclopedia of Medical Decision Making presents state-of-the-art research and ready-to-use facts sorting out findings on medical decision making and their applications.
Author: Jenifer Larson-Hall
Publisher: Routledge
ISBN: 1135594740
Category : Education
Languages : en
Pages : 438
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Book Description
This valuable book shows second language researchers how to use the statistical program SPSS to conduct statistical tests frequently done in SLA research. Using data sets from real SLA studies, A Guide to Doing Statistics in Second Language Research Using SPSS shows newcomers to both statistics and SPSS how to generate descriptive statistics, how to choose a statistical test, and how to conduct and interpret a variety of basic statistical tests. It covers the statistical tests that are most commonly used in second language research, including chi-square, t-tests, correlation, multiple regression, ANOVA and non-parametric analogs to these tests. The text is abundantly illustrated with graphs and tables depicting actual data sets, and exercises throughout the book help readers understand concepts (such as the difference between independent and dependent variables) and work out statistical analyses. Answers to all exercises are provided on the book’s companion website, along with sample data sets and other supplementary material.
Author:
Publisher: Academic Press
ISBN: 0122272455
Category : Gender identity
Languages : en
Pages : 1293
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Book Description
Author: United States. Congress
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 1452
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Book Description
The Congressional Record is the official record of the proceedings and debates of the United States Congress. It is published daily when Congress is in session. The Congressional Record began publication in 1873. Debates for sessions prior to 1873 are recorded in The Debates and Proceedings in the Congress of the United States (1789-1824), the Register of Debates in Congress (1824-1837), and the Congressional Globe (1833-1873)
