Have you ever thought.. How many gatecrashers can enter a merit list through a multiple choice tests? How much would you gain or loose by random guessing? How tests with multiple correct choices reduces the scourge due to random guessing?
Have a look at an interesting conversation between Srinivas Bhogle and Rajeeva Karandikar about validity of Multiple Choice Tests:
http://bademian.wordpress.com/2012/11/28/do-multiple-choice-tests-really-work-2/
The post is really interesting & thought provoking, Enjoyed reading :)!
ReplyDeleteI have a few questions,
1. "In general, if there are n choices, the negative mark to eliminate the advantage of random guessing is 1/(n-1)."
Is this also some estimate.. How do we get it?
2. In the first figure, when 10% of candidates are guessing, the maximum no. of imposters should not exceed 10% of 1000 i.e. 100..
Right?
Thanks a lot for sharing such an interesting stuff. Like Dr. Karandikar has said I too feel that traditional question-answer examination is better than multiple choice tests.
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