An item-reliability index provides a measure of a test's
A) test-retest reliability.
B) internal consistency.
C) stability.
D) All of these

Question

Quizplus · Accepted Answer

An item-reliability index (also called item-total correlation) measures the degree to which individual test items are consistently related to the overall test score. It is a measure of the test's internal consistency, which refers to the degree to which different items within the test measure the same construct. It is not a measure of test-retest reliability (which assesses the consistency of test scores over time) or stability (which refers to the consistency of results across different forms or versions of the same test). Therefore, the correct choice is B.

An Item-Reliability Index Provides a Measure of a Test's