A test containing 100 items is revised by deleting 20 items.What might be expected to happen to the magnitude of the reliability estimate for that test?
A) It will be expected to increase.
B) It will be expected to decrease.
C) It will be expected to stay the same.
D) It cannot be determined based on the information provided.

Question

Quizplus · Accepted Answer

The reliability of a test generally increases with the number of items it contains because more items provide a better sample of the domain being tested, leading to more consistent results. Therefore, deleting items from a test is likely to decrease its reliability.

A Test Containing 100 Items Is Revised by Deleting 20