Education · Educational Evaluation & Psychometrics
According to Item Response Theory (IRT), the visual representation of an Item Characteristic Curve (ICC) provides crucial information about a test item. The principle dictates that a steeper slope at the curve's inflection point indicates that the test item has a higher power of discrimination between ability levels. Arrange the following hypothetical test items in ascending order of their power of discrimination: A. Item W: The ICC is quite steep in the middle at its inflection point. B. Item X: The ICC has a very small slope at its inflection point. C. Item Y: The ICC exhibits the steepest slope at its inflection point among all the items. D. Item Z: The ICC demonstrates a moderate slope at its inflection point.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1B, D, A, C✓
- 2A, D, C, B
- 3D, B, A, C
- 4B, A, D, C
Correct answer
B, D, A, C
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