In classical test theory,an observed score on an ability test is presumed to represent the testtaker's
A) true score.
B) true score less the variance.
C) true score combined with extraneous factors.
D) the testtaker's true score and error.

Question

Quizplus · Accepted Answer

In classical test theory, an observed score is considered to be the sum of the true score (the actual ability or trait level of the test taker) and error (random and systematic factors not related to the trait being measured).

In Classical Test Theory,an Observed Score on an Ability Test