What is item response theory?
A) a part of classical test theory that specifies that item difficulty and discrimination are related
B) a theory that relates the performance of each item to a statistical estimate of the test taker's ability on the construct being measured
C) a theory that describes the cognitive steps a respondent takes before answering an item
D) a theory that uses probability to estimate the test taker's honestly or motivation when answering an item

Question

Quizplus · Accepted Answer

Item response theory focuses on the relationship between the performance of each item and the test taker's ability on the construct being measured, using statistical estimation. It differs from classical test theory, which focuses on item difficulty and discrimination, and from theories of cognitive processing, which describe the mental steps involved in answering an item. Item response theory does not typically address issues of honesty or motivation.

What Is Item Response Theory