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:

Parasympathetic Nervous System

A division of the autonomic nervous system responsible for rest and digest functions, conserving and restoring the body's energy.

Sympathetic Nervous System

Part of the autonomic nervous system that prepares the body for physical activity by triggering the fight or flight response.

Central Nervous System

The part of the nervous system that includes the brain and spinal cord, responsible for processing and coordinating sensory information and responses.

Somatic Nervous System

A part of the peripheral nervous system that transmits sensory and motor signals to and from the central nervous system, controlling voluntary muscle movements.