_________________is a statistical index of how efficiently an item discriminates between persons who obtain high and low scores on the entire test.
A) Item-discrimination index
B) Item-difficulty index
C) Item-validity index
D) Item-tension index

Question

Quizplus · Accepted Answer

The item-discrimination index is a statistical measure used to determine how well an item on a test distinguishes between individuals who score high overall on the test and those who score low. It indicates the effectiveness of an item in differentiating between higher and lower ability examinees.

_________________Is a Statistical Index of How Efficiently an Item Discriminates