Test developers can easily find the difficulty of an item by ______.
A) looking at how steep the item characteristic curve is
B) locating the point at which the item characteristic curve indicates a probability of .5 of answering correctly.
C) subtracting the percentage of low performers who responded correctly from the percentage of high performers who responded correctly
D) asking test takers to complete a qualitative item analysis survey on item difficulty

Question

Quizplus · Accepted Answer

The point at which the item characteristic curve indicates a probability of .5 of answering correctly is known as the item's difficulty index, and it provides a straightforward measure of its difficulty level.

Test Developers Can Easily Find the Difficulty of an Item