Experimental Design
Not what you're looking for?
In an experiment designed to examine the effects of dieting and exercise on weight loss, subjects were randomly assigned to one of four conditions: (1) both dieting and exercise, (2) dieting but no exercise, (3) exercise but no dieting, and (4) neither dieting nor exercise. Results indicated that subjects not on a diet lost only three pounds whether or not they exercised. However, subjects who dieted lost 15 pounds if they exercised and 8 pounds if they did not exercise.
a) Is there a main effect for dieting? If so, describe the effect.
b) Is there a main effect for exercise? If so, describe the effect.
c) Is there an interaction effects? If so, describe the effect.
d) Is this a true experiment? Why, or why not?
Purchase this Solution
Solution Summary
By responding to the questions related to the scenario, this response addresses aspects of experimental design e.g. main effects of dieting asnd exercising, interaction effects and if it is a true experiment.
Solution Preview
Please see attached response, which is partly presented below.
RESPONSE:
1. In an experiment designed to examine the effects of dieting and exercise on weight loss, subjects were randomly assigned to one of four conditions: (1) both dieting and exercise, (2) dieting but no exercise, (3) exercise but no dieting, and (4) neither dieting nor exercise. Results indicated that subjects not on a diet lost only three pounds whether or not they exercised. However, subjects who dieted lost 15 pounds if they exercised and 8 pounds if they did not exercise.
a) Is there a main effect for dieting? If so, describe the effect. Yes, because there is a ...
Purchase this Solution
Free BrainMass Quizzes
Psychoanalysis and Sigmund Freud
This quiz explores the personality theory of psychoanalysis, in particular reference to how Freud conceptualized of this theory.
Role of Memory in Learning
This quiz addresses the role of memory in the learning process. The quiz differentiates between the different types of memory that facilitate learning.
Theories of Work Motivation
This quiz tests the student's understanding of the major theories of work motivation from an organizational behavior perspective.
Piaget's Theories on Development
Do you know all about Piaget's theories on development? Find out with this quiz!
Perspectives of Psychology
A review of main theoretical perspectives and those most closely associated with them