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GATE 2024 XH5 (Psychology) – Question 58

Psychometrics · Foundations of Psychological Measurement: Scales and items, item construction and analysis, intelligence, performance, ability and aptitude tests, personality questionnaires · 2 marks · Multiple select

Which of the following statements is/are correct about “item-response theory”?

  1. It talks about how items should function based on the knowledge of an ability or trait.
  2. It compares responses to items to determine how well the items function.
  3. It is based on the assumption that many latent traits underlie test performance.
  4. It is a logistic function having, one, two or three parameters.

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Show answer and explanation

Correct answer: (A) It talks about how items should function based on the knowledge of an ability or trait.; (B) It compares responses to items to determine how well the items function.; (D) It is a logistic function having, one, two or three parameters.

Explanation

Item-response theory relates the chance of a correct response to a person's level on a trait, using logistic models with one, two or three parameters, and checks how well each item functions. It usually assumes one dominant latent trait, not many.