Classical and Item Response Theory

The True Score (T) in CTT is the actual score of the test-taker

• True
• False

Item Response Theory (IRT) is primarily concerned with:

• Total test scores of examinees

• The probability of a correct response based on ability and item characteristics

• Assigning grades according to a fixed percentage

• Measuring only test reliability

The CTT model is a linear model linking the observable score (X) to the sum of two unobservable variables, true score (T) and error score (E); X=T+E

• True
• False

Which of the following is NOT a characteristic of IRT?

• Item-level analysis

• Parameters are sample-independent

• Ability estimated on a latent trait

• Measurement precision is the same for all ability levels

CTT assumes that all items in an assessment make an equal contribution to the performance of test-takers.

• True
• False

Which of the following assessments uses IRT in scoring? (Choose two)

• NAT (National Achievement Test – Philippines)

• PISA (Programme for International Student Assessment)

• LET (Licensure Examination for Teachers)

• Teacher-made classroom quizzes

CTT is often used in a large-scale assessment because it does not require assumptions about the test-taker population.

• True
• False