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http://dx.doi.org/10.32431/kace.2020.23.1.002

Effect of Guessing on the Correct Answer in a Multiple Choice  

Kwon, Boseob (안동대학교)
Publication Information
The Journal of Korean Association of Computer Education / v.23, no.1, 2020 , pp. 29-36 More about this Journal
Abstract
Various items were used as evaluation tools that identify the student's abilities accurately to confirm the completion of learning. Among them, the multiple choice item has the advantages of high objectivity and reliability in scoring, but it cannot remove the factor of guessing. In this paper, the multiple choice items are classified into two types according to the relationship between the questionnaire and the choices. One is the type used in the classical test theory with the probability of guessing 1/k for k choices and the other is the novel proposed type which introduces the concept of partial knowledge. In the proposed type, the probability of guessing when the number of knowledge i is (i+1)/k for k choices. Based on the assumptions of the previous theories about multiple choice items, we derive the guessing parameter about the proposed type. And we analyzed the effect of the guess on the correct answer in the existing type and the proposed type. This shows that the proposed type has more question guessing than the existing type.
Keywords
Multiple Choice; Guessing Parameter; Item Difficulty;
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