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Software Review of IRTEQ, STUIRT, and POLYEQUATE for Item Response Theory Scale Linking and Equating
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Malatesta, Jaime; Lee, Won-Chan – Measurement: Interdisciplinary Research and Perspectives, 2019
This article reviews several software programs designed to conduct item response theory (IRT) scale linking and equating. The programs reviewed include IRTEQ, STUIRT, and POLYEQUATE. Features and functionalities of each program are discussed and an example analysis using the common-item non-equivalent groups design in IRTEQ is provided.
Descriptors: Item Response Theory, Equated Scores, Computer Software, Computer Interfaces
Multiple Group Item Response Theory Applications Using "Stata irt" Package
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Zheng, Xiaying; Yang, Ji Seung – Measurement: Interdisciplinary Research and Perspectives, 2021
The purpose of this paper is to briefly introduce two most common applications of multiple group item response theory (IRT) models, namely detecting differential item functioning (DIF) analysis and nonequivalent group score linking with a simultaneous calibration. We illustrate how to conduct those analyses using the "Stata" item…
Descriptors: Item Response Theory, Test Bias, Computer Software, Statistical Analysis
Software Note: Using BILOG for Fixed-Anchor Item Calibration
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DeMars, Christine E.; Jurich, Daniel P. – Applied Psychological Measurement, 2012
The nonequivalent groups anchor test (NEAT) design is often used to scale item parameters from two different test forms. A subset of items, called the anchor items or common items, are administered as part of both test forms. These items are used to adjust the item calibrations for any differences in the ability distributions of the groups taking…
Descriptors: Computer Software, Item Response Theory, Scaling, Equated Scores
Investigation of IRT-Based Equating Methods in the Presence of Outlier Common Items
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Hu, Huiqin; Rogers, W. Todd; Vukmirovic, Zarko – Applied Psychological Measurement, 2008
Common items with inconsistent b-parameter estimates may have a serious impact on item response theory (IRT)--based equating results. To find a better way to deal with the outlier common items with inconsistent b-parameters, the current study investigated the comparability of 10 variations of four IRT-based equating methods (i.e., concurrent…
Descriptors: Item Response Theory, Item Analysis, Computer Simulation, Equated Scores
Handbook of Polytomous Item Response Theory Models
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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
A SAS Macro for Loglinear Smoothing: Applications and Implications April. Research Report. ETS RR-06-05
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Moses, Tim P.; von Davier, Alina A. – ETS Research Report Series, 2006
The two purposes of this paper are to provide a SAS IML macro that performs loglinear smoothing and to apply this macro to loglinear smoothing problems that have not been extensively discussed in the test-equating literature. The SAS macro is demonstrated on univariate, bivariate, and trivariate smoothing problems. The univariate and bivariate…
Descriptors: Statistical Analysis, Statistical Distributions, Equated Scores, Models