Twenty-Seven Percent: The Index of Discrimination

August 24, 2015
Index of discrimination determines how well the question can tell the difference between high and low performers, and is used when we need to decide whether or not our question is good at telling who is understanding the topic, and who is not – thus discrimination. This is video #3 in Aaron Dewald's video/blog series on item Item Analysis. Full post can be found here:
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