Loophole in MCQ marking problem

Loophole in MCQ marking problem

by Mike Clarke -
Number of replies: 7

I am using version 2.8.1+


There is a problem with the way marks are rewarded when multiple answers are correct.


E.g.


I have a MCQ question a-e. 


a-d are correct answers and e is an incorrect answer. If the student selects all options, Moodle thinks that because they have selected all the right answers they have been correct and rewarded the mark despite selecting a wrong answer too.


This means that whenever there are multiple answers, students can select all and still get the marks.


Please advise.

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In reply to Mike Clarke

Re: Loophole in MCQ marking problem

by Mary Cooch -
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Hello. Does the documentation on Multiple Choice question type help?

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In reply to Mike Clarke

Re: Loophole in MCQ marking problem

by Marcus Green -
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Hi Mike, have you looked at setting a negative percentage for the incorrect answer to counteract the marks given for the correct answers? (scroll down the grade box on an answer option)

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In reply to Marcus Green

Re: Loophole in MCQ marking problem

by Mike Clarke -

Hi,


Thanks for you responses. I have looked at this but there would be no set value for a negative response. The student may answer 3 out of 4 correct choices plus an incorrect answer. If I were to do negative scoring, it would appear that they have done worse than they actually have. So, the marks would appear as if the student only answered 2 correct.

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In reply to Mike Clarke

Re: Loophole in MCQ marking problem

by Mary Cooch -
Picture of Documentation writers Picture of Moodle HQ Picture of Particularly helpful Moodlers Picture of Testers Picture of Translators
 I think that's OK personally. I used to be involved in multiple choice multi-answer exam marking in languages a few years back. What they did was, for every wrong answer they took away a mark gained from a correct answer. So if there were four possible answers, two right and two wrong, the student would get zero if they ticked all of them. I thought that was fair myself. What I tend to do when having multi-answer mcqs is to have the same number of right answers as wrong ones - so the correct answers (a) and (b) would get +50% each and (c) and (d) the incorrect answers would get -50% each (or however you wish to score it)
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