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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
The Optimal Degree of Smoothing in Equipercentile Equating with Postsmoothing.
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Zeng, Lingjia – Applied Psychological Measurement, 1995
The effects of different degrees of smoothing on results of equipercentile equating in random groups design using a postsmoothing method based on cubic splines were investigated, and a computer-based procedure was introduced for selecting a desirable degree of smoothing. Results suggest that no particular degree of smoothing was always optimal.…
Descriptors: Computer Simulation, Computer Software, Equated Scores, Research Methodology