In general, tests having greater score variability have lower reliabilities than tests with less variability.

Question

Quizplus · Accepted Answer

Greater score variability in a test does not inherently lead to lower reliability. Reliability refers to the consistency of a test in measuring what it is supposed to measure, and a test can have high reliability regardless of the level of score variability. High variability can actually be beneficial for reliability as it allows for a clearer distinction between different levels of ability or knowledge among test-takers.

In General, Tests Having Greater Score Variability Have Lower Reliabilities