Test construction involves determining the reliability of a test-how consistent and dependable obtained scores are. What does the classical test theory state about reliability?
A)That total variability equals true score variability plus error variability
B)That total variability equals true score variability minus error variability
C)That variable scores cannot be considered reliable unless they remain within a certain range over the course of multiple administrations of one test.
D)That total variability depends on subject intelligence, therefore true score variability cannot be determined

Question

Quizplus · Accepted Answer

Classical test theory states that total variability equals true score variability plus error variability. Total variability is always 100% and reliability is the proportion of true score variability (if true score variance is 70%, reliability is .70).

Test Construction Involves Determining the Reliability of a Test-How Consistent