For most tests, the maximum amount of information about differences between individuals can be obtained from items in the difficulty range of
A).30 to .70.
B).40 to .80.
C)between .55 and .85.
D)above .90.

Question

Quizplus · Accepted Answer

Items with difficulty levels ranging from .30 to .70 are most informative for distinguishing between individuals because they are neither too easy nor too hard for the average test-taker, allowing for a clearer differentiation among varying levels of ability.

For Most Tests, the Maximum Amount of Information About Differences