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| Author: | Post, G. V. |
| Title: | A quantal choice model for the detection of copying on multible choice examinations |
| Journal: | Decision Sciences
1994 : VOL. 25;1, p. 123-142 |
| Index terms: | TEACHING METHODS HUMAN RESOURCE MANAGEMENT PROBABILITY STATISTICAL METHODS |
| Language: | eng |
| Abstract: | It is difficult to devise a statistical test to detect one student copying from another. Many prior efforts falsely accuse students of cheating. A general methodology based on the quantal choice model of decision theory overcomes these problems. 3 steps are involved: (1) for each item estimate the probability and variance that a given respondent will select each response, (2) for pairs of repsondents, these probabilities determine the expected number of matches , and (3) compare the critical value to the number of items matched. Methods differ based on the probability estimation technique. Four methods are compared on theoretical and empirical grounds. Theory and results show that it is crucial to incorporate the variance of the probability estimates. |
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