RESEARCH STUDY 10.2 Dr. Bloedorn Is a Health Psychologist Who Researches Nutrition. She

question 37

Multiple Choice

RESEARCH STUDY 10.2
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) .
-Refer to Research Study 10.2 above to answer the following question. Which of the following threats to internal validity will Dr.Bloedorn NOT be worried about?

• A) History
• B) Attrition
• C) Instrumentation
• D) Placebo effects
• E) She should be worried about all of the above

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