A Survey on Automated Distractor Evaluation in Multiple-Choice Tasks

Multiple-Choice Tasks are one of the most common types of assessment item, due to their feature of being easy to automatically and objectively grade.A key component of Multiple-Choice Tasks are distractors -i.e., the wrong answer options -since poor distractors affect the overall quality of the item: e.g., if they are obviously wrong, they are never selected.Thus, previous research has focused extensively on techniques for automatically generating distractors, which can be especially helpful in settings where large pools of questions are desirable or needed.However, there is no agreement within the community about the techniques that are most suited to evaluate generated distractors, and the ones used in the literature are sometimes not aligned with how distractors perform in real exams.In this review paper, we perform a comprehensive study of the approaches which are used in the literature for evaluating generated distractors, propose a taxonomy to categorise them, discuss if and how they are aligned with distractors performance in exam settings, and what are the differences for different question types and educational domains.