Answered: Describe the advantages of a two- group…

Ciccarelli: Psychology_5 (5th Edition)

5th Edition

ISBN:9780134477961

Author:Saundra K. Ciccarelli, J. Noland White

Publisher:Saundra K. Ciccarelli, J. Noland White

Chapter1: The Science Of Psychology

Section: Chapter Questions

Problem 1TY

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Describe the advantages of a two- group design compared to an experiment with more than two groups. Then describe the advantages of a multiple-group design compared to an experiment with only two groups.

Expert Solution

Step 1

A two group design is the one in which the participants are divided into two groups out of which one group is the control group- those who don't get any treatment, and the other group is the experimental group- those who get the treatment. The results are then compared between the two groups.

A two group design has the following advantages over a multiple group design:

Requires less number of participants.
Doesn't take a lot of time.
Is cost effective.
Minimize the random noise, that is, the chances of a real difference between the conditions going undetected are less in a two group design.
Treatments can be easily controlled and independent variable of interest are studied and compared with ease.