WorksheetsClassical and Item Response Theory
Total questions: 7
Worksheet time: 4mins
The True Score (T) in CTT is the actual score of the test-taker
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
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.
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.
