A test can usually be made more reliable by increasing the
A) correlation between test and criterion scores.
B) length of time for administering the test.
C) number of items on the test.
D) observed variance relative to true variance.

Question

Quizplus · Accepted Answer

Increasing the number of items on a test generally increases its reliability by averaging out any random errors across a larger set of questions, leading to a more accurate measure of what is being tested.

A Test Can Usually Be Made More Reliable by Increasing