What Is Item Response Theory

Multiple Choice

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