For the majority of the items in any given test, the difficulty index should be kept at approximately
A) .99
B) .50
C) .01
D) none of these, since item difficulty is not a quantifiable value.

Question

Quizplus · Accepted Answer

The ideal difficulty index for the majority of items in a test is around .50, meaning that roughly half of test-takers should answer the question correctly and half should answer incorrectly. This allows for differentiation among test-takers and ensures that the test is not too easy or too difficult. Choosing answer A or C would result in a skewed test that is either too easy or too difficult, and answer D is incorrect as item difficulty is a quantifiable value.

For the Majority of the Items in Any Given Test