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

Question

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:

-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

Quizplus · Accepted Answer

A null effect means that there is no significant difference between the treatment group (using the drink additive) and the control group (not using the drink additive). This is not a result of situational noise or within-group variance, and it is not related to the placebo effect since the drink additive has no taste or smell.

DrBloedorn Is a Health Psychologist Who Researches Nutrition