Item Analysis Chapter 10: Understanding Test Item Functioning
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Questions and Answers

What is the primary focus of item analysis?

  • Exploring test reliability and validity
  • Evaluating the entire test as a whole
  • Improving the test environment
  • Assessing the functioning of individual test items (correct)

    • What is the aim of item analysis?

  • To explain low reliability and validity
  • To eliminate all distractors in multiple choice questions
  • To develop better tests by improving individual items (correct)
  • To increase the number of test items

    • What does distractor analysis examine in a multiple choice test?

  • The frequency of each correct response chosen by examinees
  • The time taken by examinees to complete the test
  • The difficulty level of each answer option in a question
  • The effectiveness of the distractors in leading examinees away from the correct answer (correct)

    • What should good distractors do in a multiple choice test?

    <p>Equally distract examinees from the correct answer</p> Signup and view all the answers

    What does item difficulty analysis focus on?

    <p>Measuring how easy or difficult an item is for examinees</p> Signup and view all the answers

    What is the purpose of removing bad items in item analysis?

    <p>To improve the overall quality of the test</p> Signup and view all the answers

    What is the optimum difficulty level for a four-choice item according to Kaplan and Saccuzzo (2017)?

    <p>0.625</p> Signup and view all the answers

    What is the aim of Item Discrimination Analysis?

    <p>All of the above</p> Signup and view all the answers

    What is the formula for Discrimination index (D)?

    <p>(U / nu) - (L / nl)</p> Signup and view all the answers

    What does a negative Discrimination index (D) indicate?

    <p>The item is easier for lower performing individuals.</p> Signup and view all the answers

    What range of values can Interitem correlation have?

    <p>-1 to 1</p> Signup and view all the answers

    What is the percentage of guessing for a true-false item?

    <p>%50</p> Signup and view all the answers

    How does item difficulty change with plausible distractors?

    <p>It increases</p> Signup and view all the answers

    What does a p value of 1.0 indicate?

    <p>Everyone answers correctly</p> Signup and view all the answers

    Why are extreme p values (0 or 1) not optimal for measuring individual differences?

    <p>They restrict the variability of test scores.</p> Signup and view all the answers

    'Item-total correlation' helps in determining what aspect of an item's performance?

    <p>The relationship between total test score and item score.</p> Signup and view all the answers

    What defines optimum difficulty level for a true-false item?

    <p>0.75</p> Signup and view all the answers

    What does 'p' value measure in relation to test items?

    <p>The overall difficulty level.</p> Signup and view all the answers

    What is the capital city of Denmark?

    <p>Copenhagen</p> Signup and view all the answers

    What is the optimal difficulty level for a four-choice item, according to Kaplan and Saccuzzo (2017)?

    <p>0.625</p> Signup and view all the answers

    What does a discrimination index (D) of 0.50 indicate?

    <p>Item successfully discriminates between low and high scores</p> Signup and view all the answers

    What is the percentage of answering a true-false question by guessing?

    <p>50%</p> Signup and view all the answers

    What can a (-) item-total correlation indicate?

    <p>Item scores disagree with total test scores</p> Signup and view all the answers

    What does an item-total correlation of 0 indicate?

    <p>Item does NOT discriminate between low and high scores</p> Signup and view all the answers

    What does a p value of 1.0 indicate?

    <p>Everyone chooses the correct response</p> Signup and view all the answers

    What does a p value of 0.0 indicate?

    <p>Everyone chooses an incorrect response</p> Signup and view all the answers

    'How many people answered the item correctly.' Only applicable to maximum performance tests. What does 'p=1' mean?

    <p>Everyone answered correctly</p> Signup and view all the answers

    What is the optimum difficulty level for a true-false item, according to Kaplan and Saccuzzo (2017)?

    <p>0.75</p> Signup and view all the answers

    What is the aim of measuring the discriminating power of an item?

    <p>To find out the extent to which responses to each item discriminate those who receive high vs. low scores on the test.</p> Signup and view all the answers

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