EDUCATION UGC NET
SCHOOL AND CLASSROOM MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Item is weak
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Item is good
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tem is acceptable
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None
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Detailed explanation-1: -Ranges from-1.0 to +1.0; the closer to 0.0 indicates no discrimination among high-and low-performing students. Achieving closer to 1.0 discrimination index is optimal. A discrimination index of 0.3 or greater is considered highly discriminating.
Detailed explanation-2: -Items with a DI of ≥0.35 were considered excellent, those between 0.2–0.34 were considered acceptable and those <0.2 were considered poor. The DE was calculated based on the number of nonfunctional distractors (NFDs) per item.
Detailed explanation-3: -Discrimination Index-The discrimination index is a basic measure of the validity of an item. It is a measure of an item’s ability to discriminate between those who scored high on the total test and those who scored low.
Detailed explanation-4: -However, if it is a tricky question where only a small percentage of candidates got it correct, then a low discrimination index is a problem as it suggests the item was answered correctly equally by the stronger and weaker candidates, showing it is not discriminating between them.