DrBloedorn Is a Health Psychologist Who Researches Nutrition

question 51

Multiple Choice

Dr.Bloedorn is a health psychologist who researches nutrition.She is curious as to whether a new drink additive will help people consume fewer calories during a meal.The drink additive is a white,odorless,tasteless powder that a person can add to any drink.She collects a random sample of 63 overweight students on campus and measures the calories they eat during lunch,using a bomb calorimeter.She then gives this additive to the same 63 participants to use at dinner and measures how many calories they eat (again,using the bomb calorimeter) .

-Which of the following threats to internal validity will Dr.Bloedorn NOT be worried about?

• A)Testing effect
• B)Attrition
• C)Instrumentation
• D)Placebo effects

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Definitions:

Discount Sources

Various origins from which price reductions can be obtained, such as coupons, sales promotions, or bulk buying.

Cost Function

A mathematical formula used to calculate the total cost of production based on the quantity of goods produced.

Used-Car Dealer

A business specializing in the resale of previously owned vehicles, often offering trade-in deals and warranty services.

Stackelberg Leader

A concept in game theory and economic models where one firm (the leader) sets its output or price before another firm (the follower), influencing the follower's decisions in a competitive market.