As the error variance of a measure goes up, _____.

Question

Quizplus · Accepted Answer

As the error variance of a measure goes up, the reliability goes down. This is because error variance represents the amount of random variability in the scores that cannot be attributed to the construct being measured, which lowers the consistency and stability of the measure. Validity may also be affected if the error variance is large enough to obscure the true relationship between the measure and its intended construct.

As the Error Variance of a Measure Goes Up, _____