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. Imagine that Dr.Bloedorn finds no difference between the calories consumed with the drink additive and without.This is known as:
A) Situation noise
B) Within-group variance
C) A null effect
D) Placebo effect
E) None of the above

Question

Quizplus · Accepted Answer

When Dr. Bloedorn finds no difference between the calories consumed with the drink additive and without, this is known as a null effect, meaning that the hypothesis that the additive will help people consume fewer calories during a meal is not supported by the data. Situation noise refers to extraneous variables that may affect the results, within-group variance refers to the variability within each group being compared, and placebo effect refers to the phenomenon of a treatment having a positive effect simply because the person believes it will, even if the treatment has no active ingredients. None of these terms accurately describe the scenario in the question.

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