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Stochastic Simulation of Test Results with Guessing

Multiple-choice exam? I will guess!
Multiple-choice questions are objective and can easily and quickly be scored. But an item is often scored as solved simply because the test taker is a lucky guesser.
This Demonstration shows the accumulated scores for some test takers.

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References:
[1] J. Anderson, "Multiple-Choice Questions Revisited," Med. Teach. 26(2), 2004 pp. 110–113.
[2] S. M. Case and D. B. Swanson, Constructing Written Test Questions for the Basic and Clinical Sciences, 3rd ed., Philadelphia, PA: National Board of Medical Examiners, 2002.
[3] R. M. Zurawski, "Making the Most of Exams: Procedures for Item Analysis," Natl. Teach. Learn. Forum, 7, 1998 pp. 1–4.
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