An ADVANTAGE of applying item response theory (IRT)in test development is that
A) the principles underlying IRT make its application easy and appealing.
B) sample sizes used to test the utility of test items can be relatively small.
C) assumptions underlying IRT usage are weak.
D) item statistics are independent of the samples administered the test.

Question

Quizplus · Accepted Answer

Item Response Theory (IRT) posits that the probability of a correct response to a test item is a function of the item's properties and the respondent's ability level. A significant advantage of IRT is that item parameters (difficulty, discrimination) are considered invariant across different populations, meaning the item statistics are not dependent on the specific sample of test-takers. This allows for more accurate comparisons and predictions across different groups.

An ADVANTAGE of Applying Item Response Theory (IRT)in Test Development