GROWTH DEVELOPMENT CHILD
CONCEPT OF ASSESSMENT AND EVALUATION CONCEPT OF ASSESSMENT AND EVALUATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The test is quite reliable
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More from the upper group got the item correctly
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The test is valid
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More from the lower group got the itemcorrectly.
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Detailed explanation-1: -The discrimination index of a test item is 0.35. What does this mean? More students in the lower group got the item correctly than those student in the upper group.
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: -The item will have low discrimination if it is so difficult that almost everyone gets it wrong or guesses, or so easy that almost everyone gets it right. To maximize item discrimination, desirable difficulty levels are slightly higher than midway between chance and perfect scores for the item. (
Detailed explanation-4: -The resulting discrimination index of 0.67 indicates that the essay task is an appropriate measurement component of the test. Tests in which the overall discrimination level is high provide the best possible evidence for assigning student grades and making other important educational decisions.
Detailed explanation-5: -The discrimination index (DI) measures how discriminating items in an exam are – i.e. how well an item can differentiate between good candidates and less able ones. For each item it is a measure based on the comparison of performance between stronger and weaker candidates in the exam as a whole.