What Is the Value of the Item-Discrimination Index for an Item

question 22

Multiple Choice

What is the value of the item-discrimination index for an item answered correctly by an equal number of students in the higher- and lower-scoring groups?

• A) -1
• B) +1
• C) .50
• D) 0

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Definitions:

Lemons

In economics, a term used to describe a product of significantly lower quality than what was expected, particularly in the context of used vehicles.

Potential Buyers

Individuals or entities that show interest in purchasing a product or service but have not yet made the decision to buy.

Relative Measure

A comparative metric that evaluates a data point or performance outcome in relation to another baseline or standard.

Emission Output

The total quantity of pollutants released into the environment, often measured in the context of industrial operations or vehicle emissions.