What is the impact of adding distractors on polytomous item reliability?
A)The number of distractors is inversely related to item reliability.
B)Large numbers of distractors can greatly increase reliability.
C)Adding distractors may not increase reliability if the distractors are implausible.
D)Reliability is optimized when there are 8 to 10 distractors.

Question

Quizplus · Accepted Answer

Adding distractors that are not plausible or easily dismissed by test-takers does not contribute to the reliability of an item. For a distractor to be effective and potentially increase the reliability of an item, it must be plausible to those who do not know the correct answer.

What Is the Impact of Adding Distractors on Polytomous Item