Education · Assessment and Evaluation
A researcher intends to construct an intelligence test item specifically designed to separate the upper 25% of the group from its lower 75%. What should be the difficulty index of that item?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Between 50% and 75%
- 2Between 25% and 50%
- 3Close to 75%
- 4Close to 25%✓
Correct answer
Close to 25%
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