Multi-choice seems to have come back into fashion somewhat in the UK. I gather it has long been used extensively in the USA as a means of practising and assessing skills and knowledge. Writing good multi-choice tasks is an interesting challenge and I was happy to learn something about it a few years ago when I wrote some assessment tasks for Asset Languages in Cambridge. Firstly, three options are, it seems, as statistically adequate as four, although you often see four choices given on exam papers. Secondly, it is important that all options be "in play". That is, they must be reasonably tempting to the learner. Thirdly, a good multi-choice question should have the aim of allowing about 70% or 80% of learners to get the answer right. A good balance of outcomes would be around 70% get the right option, with the other two options getting about 15% each. A question which attracts equal responses for each option is a poor one. Similarly, if one option gets no ticks, it is a
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