With a reliability coefficient of .81, using classical test theory we would interpret that the: A)amount of error variance to observed variance is 81 percent. B)amount of true variance to observed variance is 81 percent. C)instrument has good enough reliability. D)instrument's validity coefficient would be 0.81 ² .

Question

Quizplus · Accepted Answer

The reliability coefficient in classical test theory represents the proportion of the variance in test scores that is due to true score variance. A coefficient of .81 means that 81% of the variance in observed scores is due to true variance, indicating the instrument is reliable.

With a Reliability Coefficient of