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Showing 1 to 15 of 22 results Save | Export
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Maydeu-Olivares, Alberto – Measurement: Interdisciplinary Research and Perspectives, 2013
In this rejoinder, Maydeu-Olivares states that, in item response theory (IRT) measurement applications, the application of goodness-of-fit (GOF) methods informs researchers of the discrepancy between the model and the data being fitted (the room for improvement). By routinely reporting the GOF of IRT models, together with the substantive results…
Descriptors: Goodness of Fit, Models, Evaluation Methods, Item Response Theory
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Andrich, David – Measurement: Interdisciplinary Research and Perspectives, 2011
This commentary examines the role of the unit from the perspective of the definition of measurement in physics as the ratio of two magnitudes, one of which is defined as the unit; it is an important and timely contribution to measurement in the social sciences. There are many different points that could be commented upon, but the author will…
Descriptors: Social Sciences, Physics, Psychometrics, Item Response Theory
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Salzberger, Thomas – Measurement: Interdisciplinary Research and Perspectives, 2011
Compared to traditional test theory, where person measures are typically referenced to the distribution of a population, item response theory allows for a much more meaningful interpretation of measures as they can be directly compared to item locations. However, Stephen Humphry shows that the crucial role of the unit of measurement has been…
Descriptors: Psychometrics, Item Response Theory, Measurement, Sociometric Techniques
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Heene, Moritz – Measurement: Interdisciplinary Research and Perspectives, 2011
Humphry (this issue) deserves credit for drawing attention to the long-neglected fact that differences in item discrimination parameters are often due to empirical factors and not the product of random error components. In doing so, Humphry offers a psychometrically elegant, coherent, and practically important new model that is more flexible while…
Descriptors: Measurement, Item Response Theory, Data, Psychometrics
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Engelhard, George, Jr.; Perkins, Aminah F. – Measurement: Interdisciplinary Research and Perspectives, 2011
Humphry (this issue) has written a thought-provoking piece on the interpretation of item discrimination parameters as scale units in item response theory. One of the key features of his work is the description of an item response theory (IRT) model that he calls the logistic measurement function that combines aspects of two traditions in IRT that…
Descriptors: Foreign Countries, Social Sciences, Item Response Theory, Testing
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Kyngdon, Andrew – Measurement: Interdisciplinary Research and Perspectives, 2011
Behavioral scientists have struggled with units of measurement for as long as they have struggled with measurement itself. Psychology's sole attempt at an explicit unit of measurement--the Lexile Framework for Reading (Stenner, Burdick, Sanford, & Burdick, 2006)--has been and continues to be ignored by the psychometric "cognoscenti."…
Descriptors: Measurement Techniques, Psychometrics, Behavioral Sciences, Scientists
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Humphry, Stephen M. – Measurement: Interdisciplinary Research and Perspectives, 2011
The purpose of this article is to examine the role of the unit in physics in order to clarify the role of the unit in psychometrics. Based on this examination, metrological conventions are used to formulate the relationship between discrimination and the unit of a scale in item response theory. Seminal literature in two lines of item response…
Descriptors: Simulation, Social Sciences, Physics, Measures (Individuals)
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Humphry, Stephen M. – Measurement: Interdisciplinary Research and Perspectives, 2011
This article presents Stephen Humphry's response to the commentaries for his article "The Role of the Unit in Physics and Psychometrics." The commentaries covered a range of important considerations and implications. Given that the author fully agrees with the majority of the content, attention will be confined mainly to points that call…
Descriptors: Physics, Criticism, Misconceptions, Calculus
Chen, Tzu-An – ProQuest LLC, 2010
This simulation study compared the performance of two multilevel measurement testlet (MMMT) models: Beretvas and Walker's (2008) two-level MMMT model and Jiao, Wang, and Kamata's (2005) three-level model. Several conditions were manipulated (including testlet length, sample size, and the pattern of the testlet effects) to assess the impact on the…
Descriptors: Simulation, Item Response Theory, Comparative Analysis, Models
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Navakatikyan, Michael A.; Davison, Michael – Journal of the Experimental Analysis of Behavior, 2010
Dynamical models based on three steady-state equations for the law of effect were constructed under the assumption that behavior changes in proportion to the difference between current behavior and the equilibrium implied by current reinforcer rates. A comparison of dynamical models showed that a model based on Navakatikyan's (2007) two-component…
Descriptors: Behavior Change, Reinforcement, Equations (Mathematics), Models
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Wang, Jianjun – School Science and Mathematics, 2011
As the largest international study ever taken in history, the Trend in Mathematics and Science Study (TIMSS) has been held as a benchmark to measure U.S. student performance in the global context. In-depth analyses of the TIMSS project are conducted in this study to examine key issues of the comparative investigation: (1) item flaws in mathematics…
Descriptors: Test Items, Figurative Language, Item Response Theory, Benchmarking
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Worts, Diana; Sacker, Amanda; McDonough, Peggy – Social Indicators Research, 2010
This paper addresses a key methodological challenge in the modeling of individual poverty dynamics--the influence of measurement error. Taking the US and Britain as case studies and building on recent research that uses latent Markov models to reduce bias, we examine how measurement error can affect a range of important poverty estimates. Our data…
Descriptors: Poverty, Measurement, Error of Measurement, Probability
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Schulz, Wolfram; Fraillon, Julian – Educational Research and Evaluation, 2011
When comparing data derived from tests or questionnaires in cross-national studies, researchers commonly assume measurement invariance in their underlying scaling models. However, different cultural contexts, languages, and curricula can have powerful effects on how students respond in different countries. This article illustrates how the…
Descriptors: Citizenship Education, International Studies, Item Response Theory, International Education
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Wendt, Heike; Bos, Wilfried; Goy, Martin – Educational Research and Evaluation, 2011
Several current international comparative large-scale assessments of educational achievement (ICLSA) make use of "Rasch models", to address functions essential for valid cross-cultural comparisons. From a historical perspective, ICLSA and Georg Rasch's "models for measurement" emerged at about the same time, half a century ago. However, the…
Descriptors: Measures (Individuals), Test Theory, Group Testing, Educational Testing
Nering, Michael L., Ed.; Ostini, Remo, Ed. – Routledge, Taylor & Francis Group, 2010
This comprehensive "Handbook" focuses on the most used polytomous item response theory (IRT) models. These models help us understand the interaction between examinees and test questions where the questions have various response categories. The book reviews all of the major models and includes discussions about how and where the models…
Descriptors: Guides, Item Response Theory, Test Items, Correlation
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