An assumption inherent in classical test theory (CTT)is that
A) each test-taker has a true score that would have been obtained if not for measurement error.
B) testtakers can be ranked according to the level of the trait or ability that they exhibit in much the same way that rankings can be made by height.
C) measurement can be perfectly accurate if the measuring tool is well-constructed.
D) All of these

Question

Quizplus · Accepted Answer

The assumption inherent in classical test theory (CTT) is that each test-taker has a true score that would have been obtained if not for measurement error. CTT assumes that measurement error affects the observed score, but the true score remains constant. The other options are incorrect because CTT does not assume that test-takers can be ranked in the same way as physical attributes and that measurement can be perfectly accurate.

An Assumption Inherent in Classical Test Theory (CTT)is That