Item Analysis Chapter 10: Item Response Theory and Item Characteristic Curve
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Questions and Answers

What is the Item Characteristic Curve (ICC) used to graphically present?

  • The number of people who take the test
  • The types of people who take the test
  • The probability of choosing the correct answer as a function of the level of attribute measured by the test (correct)
  • The difficulty of the test items

    • What is emphasized by modern approaches to test development and analysis?

  • Statistics and analytic methods (correct)
  • Simple methods of item analysis
  • Traditional item analysis
  • The influence of people who take the test

    • Which feature of an item does the Item Characteristic Curve (ICC) summarize?

  • The number of people who choose the correct answer
  • Difficulty, discriminating power, and probability of answering correctly (correct)
  • The types of people who take the test
  • The level of attribute measured by the test

    • What does a very difficult item with little discriminating power indicate?

    <p>The item is not well-constructed</p> Signup and view all the answers

    According to the Item Characteristic Curve (ICC), what happens as verbal ability increases?

    <p>The probability of choosing the correct answer increases</p> Signup and view all the answers

    What does it mean when people who did well on a test are less likely to do well on a particular item?

    <p>The item has low discriminating power</p> Signup and view all the answers

    According to item response theory (IRT), what is the purpose of using item characteristic curves?

    <p>To describe the relationship between a person’s ability level and the likelihood of a correct answer</p> Signup and view all the answers

    In IRT, what does item discriminating power refer to?

    <p>The relationship between item responses and the construct measured by the test</p> Signup and view all the answers

    What is a disadvantage of using traditional item analysis, as compared to item response theory (IRT)?

    <p>It links item responses to total test scores rather than to the construct measured by the test</p> Signup and view all the answers

    In IRT, what does a difficult item refer to?

    <p>An item that requires a high level of ability to achieve a correct answer</p> Signup and view all the answers

    How does adaptive testing differ from traditional test construction?

    <p>It tailors the test to the individual examinee's ability level</p> Signup and view all the answers

    What can be achieved by constructing separate item characteristic curves for each possible response in a multiple-choice test?

    <p>Getting information about ability from distractors</p> Signup and view all the answers

    In IRT, how does item discriminating power differ from traditional approaches to item analysis?

    <p>It depends on the relationship between item responses and the construct measured by the test</p> Signup and view all the answers

    What is a potential application of adaptive testing?

    <p>Tailoring the test to the individual examinee's ability level</p> Signup and view all the answers

    1

    <p>To determine if everyone answers correctly at higher ability levels</p> Signup and view all the answers

    What does adaptive testing allow for?

    <p>Estimating ability at each step of testing and then selecting next item accordingly</p> Signup and view all the answers

    What does screening tests aim at?

    <p>Separating out people with a given characteristic</p> Signup and view all the answers

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