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

question 16

Multiple Choice

What is the value of the item-discrimination index for an item that all the students in the higher-scoring group answered correctly but that no one in the lower-scoring group answered correctly?

• A) -1
• B) +1
• C) .50
• D) .25

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Definitions:

PCBs

Polychlorinated biphenyls, a group of toxic chemical compounds that are environmentally dangerous and were widely used in electrical equipment before being banned.

Pesticide Residue

Trace amounts of chemicals from pesticides that remain on or in food after they are applied to crops.

Companion Regulations

Secondary regulations that accompany primary legislation to provide detailed guidance on its implementation or enforcement.

Environmental Impact Statement

A document prepared to describe the effects for proposed activities on the environment, intended to inform decision-making on such activities.