DrBloedorn Is a Health Psychologist Who Researches Nutrition

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) .

-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