#9869. Monitoring Item Performance With CUSUM Statistics in Continuous Testing

September 2026publication date
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Journal’s subject area:
Social Sciences (miscellaneous);
Education;
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Abstract:
In many educational assessments, items are reused in different administrations throughout the life of the assessments. Ideally, a reused item should perform relatively similarly over time. In reality, an item may become easier with exposure, especially when item preknowledge has occurred. This article presents a novel cumulative sum procedure for detecting item preknowledge in continuous testing where data for each reused item may be obtained from small and varying sample sizes across administrations. Its performance is evaluated with simulations and analytical work.
Keywords:
change point; item preknowledge; item residual; item response theory; quality assurance; test security

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