Multiple-choice Questions : on tests : should have variable costs based on the importance of the question.
- 1. Every question should have a "I don't know / abstinence" option.
- 2. Every question should negative points, if the answer is wrong.
- 3. The ratio of negative to positive points should be obvious to the test taker; for simplicity, every correct answer should have +1 points, but wrong answers may be -0.5, -1, -2, -4, etc.
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