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Psychometric Principles and Analysis Flashcards

7 cards from real CBT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Psychometric Principles and Analysis flashcards as text

  1. A psychometrician calculates the standard error of measurement (SEM) for a test with SD = 15 and reliability = 0.91. Approximately what is the SEM?

    Answer: 4.50

    SEM = SD × √(1 − reliability) = 15 × √(0.09) = 15 × 0.30 = 4.50.

  2. Which of the following is a key assumption of parallel test forms in classical test theory?

    Answer: Both forms have equal true scores and equal error variances for all examinees

    Parallel forms require equal true scores and equal error variances for every examinee, ensuring the forms are interchangeable measures of the same construct.

  3. In computerized adaptive testing (CAT), which method is most commonly used to select the next item after each response?

    Answer: Select the item with maximum information at the current ability estimate

    CAT algorithms typically select the item that provides maximum Fisher information at the current theta estimate, efficiently narrowing the measurement error.

  4. A test blueprint specifies that 30% of items must cover 'Application' and 20% must cover 'Analysis' per Bloom's Taxonomy. This document primarily supports which type of validity evidence?

    Answer: Content validity

    A test blueprint or table of specifications documents systematic domain coverage, providing content validity evidence that the test adequately samples the intended construct.

  5. When comparing two tests measuring the same construct, a correlation of r = 0.78 is found. This supports which type of validity evidence?

    Answer: Convergent validity

    Convergent validity evidence is demonstrated when a test correlates highly with other measures of the same or theoretically related constructs.

  6. The Rasch model is considered a special case of which broader IRT model?

    Answer: The one-parameter logistic model (1PL), which is equivalent to Rasch

    The Rasch model is mathematically equivalent to the 1PL model, constraining all item discriminations to be equal and not including a guessing parameter.

  7. A test is described as having high 'ecological validity.' What does this mean?

    Answer: Test performance generalizes well to real-world behaviors and settings

    Ecological validity refers to how well test scores predict or reflect functioning in real-world, everyday contexts beyond the testing environment.