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Download full textHan, Kyung T.; Wells, Craig S.; Hambleton, Ronald K. – Practical Assessment, Research & Evaluation, 2015
In item response theory test scaling/equating with the three-parameter model, the scaling coefficients A and B have no impact on the c-parameter estimates of the test items since the cparameter estimates are not adjusted in the scaling/equating procedure. The main research question in this study concerned how serious the consequences would be if…
Descriptors: Item Response Theory, Monte Carlo Methods, Scaling, Test Items
Direct linkKeller, Lisa A.; Hambleton, Ronald K. – Journal of Educational Measurement, 2013
Due to recent research in equating methodologies indicating that some methods may be more susceptible to the accumulation of equating error over multiple administrations, the sustainability of several item response theory methods of equating over time was investigated. In particular, the paper is focused on two equating methodologies: fixed common…
Descriptors: Item Response Theory, Scaling, Test Format, Equated Scores
