Professor Plum Devises a New Personality Test and Administers It

question 129

Multiple Choice

Professor Plum devises a new personality test and administers it to a large and representative group of people, finding a wide distribution of scores on the test. Two months later he administers a second form of the same test to the same people and finds that most people receive almost the same score they had the first time. He should conclude that the test has

• A) high reliability and high validity.
• B) high reliability and unknown validity.
• C) unknown reliability and high validity.
• D) unknown reliability and unknown validity.

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Definitions:

Demand Increased

A situation where the quantity of a product or service desired by buyers rises due to factors like income growth, taste changes, or price decreases of the product or complementary goods.

Inferior Good

A type of good for which demand decreases as the income of the consumer increases, opposite of a normal good.

Downsloping

Refers to a curve or line moving downwards on a graph, often used in economics to describe demand curves where price and quantity demanded move in opposite directions.

Demand and Supply

The fundamental economic concept that describes the amount of a specific good or service that is available to consumers and the desire of consumers for it, considered as functions of its price.