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Wind, Stefanie A.; Engelhard, George, Jr. – Educational and Psychological Measurement, 2016
Mokken scale analysis is a probabilistic nonparametric approach that offers statistical and graphical tools for evaluating the quality of social science measurement without placing potentially inappropriate restrictions on the structure of a data set. In particular, Mokken scaling provides a useful method for evaluating important measurement…
Descriptors: Nonparametric Statistics, Statistical Analysis, Measurement, Psychometrics
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Randall, Jennifer; Cheong, Yuk Fai; Engelhard, George, Jr. – Educational and Psychological Measurement, 2011
To address whether or not modifications in test administration influence item functioning for students with disabilities on a high-stakes statewide problem-solving assessment, a sample of 868 students (with and without disabilities) from 74 Georgia schools were randomly assigned to one of three testing conditions (resource guide, calculator, or…
Descriptors: Item Response Theory, Models, Context Effect, Test Bias
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Engelhard, George, Jr. – Educational and Psychological Measurement, 2009
The major purpose of this study is to describe a conceptual framework for examining differential item functioning (DIF) and differential person functioning (DPF) as types of model-data misfit within the context of assessing students with disabilities. Specifically, DIF and DPF can be viewed through the lens of residual analyses. Residual analyses…
Descriptors: Item Response Theory, Test Bias, Disabilities, Special Needs Students
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Rentz, R. Robert – Educational and Psychological Measurement, 1980
This paper elaborates on the work of Cardinet, and others, by clarifying some points regarding calculations, specifically with reference to existing computer programs, and by presenting illustrative examples of the calculation and interpretation of several generalizability coefficients from a complex six-facet (factor) design. (Author/RL)
Descriptors: Analysis of Variance, Computation, Computer Programs, Error of Measurement