An attempt to determine whether a given item separates the high from the low performers on the overall test is called the
A) discrimination index (DI).
B) item difficulty level (IDL)
C) item response test (IRT)
D) discrimination of performance evaluation (DOPE)

Question

Quizplus · Accepted Answer

The discrimination index (DI) is a statistical measure used to determine whether a given item on a test is able to differentiate between high and low performing students. It is calculated by comparing the proportion of high scorers who answered the item correctly to the proportion of low scorers who answered the item correctly. A high DI indicates that the item is able to distinguish between high and low performers, while a low DI indicates that the item may not be an effective differentiator. Therefore, option A is the best choice as it directly relates to the given scenario. Option B is incorrect as item difficulty level is a measure of how difficult an item is for all students, regardless of their performance. Option C and D are made-up terms and not related to the given scenario.

An Attempt to Determine Whether a Given Item Separates the High