As a Distribution of Scores Gets Flatter,what Happens to the Optimal

question 116

Multiple Choice

As a distribution of scores gets flatter,what happens to the optimal boundary line for determining higher- and lower-scoring groups for item-discrimination indices?

• A) the optimal boundary line gets smaller
• B) the optimal boundary line gets larger
• C) the optimal boundary line does not change
• D) the optimal boundary line ceases to be optimal

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