Author Question: Which is true regarding the item characteristic curve, or S curve, in Item Response Theory (IRT)? ... (Read 29 times)

yoooooman · **on:** Jul 30, 2018

Which is true regarding the item characteristic curve, or S curve, in Item Response Theory (IRT)?

a. It assumes that as people's abilities increase, their probability of answering the item correctly decreases.
b. A tall S means that an item has difficulty discriminating across ability.
c. IRT and the S curve assist in writing items to target specific ranges of ability.
d. It is useful in predicting the Standard Error of the Estimate.

Question 2

Which of the following is true regarding Classical Test Theory and/or Item Response Theory (IRT)?

a. Classical Test Theory provides more sophisticated information regarding test items.
b. IRT examines items individually to assess their ability to measure the trait.
c. In IRT, test items are viewed as a whole in an attempt to reduce measurement error.
d. As reliability increases in Classical Test Theory, the measurement error increases.