Research Methods for the Behavioral Sciences (MindTap Course List)
6th Edition
ISBN: 9781337672023
Author: GRAVETTER
Publisher: Cengage
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Textbook Question
Chapter 8, Problem 11E
Describe the advantages of a two-group design compared to an experiment with more than two groups.
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What are the advantages of conducting experiments with more than two groups or conditions?
A school psychologist wants to test the effectiveness of a new method of teaching biologybiology. She recruits 500500 firstfirst-grade students and randomly divides them into two groups. Group 1 is taught by means of the new method, while group 2 is taught by traditional methods. The same teacher is assigned to teach both groups. At the end of the year, an achievement test (graded on a scale from 1-10) is administered and the results of the two groups are compared. Complete parts (a) through (i) below.(a) What is the response variable in this experiment?
A.The scores on the achievement tests of both group 1 and group 2
B.The students' ability in biologybiology
C.The score of group 1 on the achievement test
D.The score of group 2 on the achievement test
(b) Is the response variable qualitative or quantitative?
A.The response variable is quantitative because it is a measurement.
B.The response variable is quantitative because it is a characteristic.
C.The response variable is…
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3. A pharmaceutical company that wants to test the effectiveness of a new allergy drug identifies 250
females 30-35 years old who suffer from severe allergies. The subjects are randomly assigned into two
groups. One group is given the new allergy drug and the other is given a placebo that looks exactly like
the new allergy drug. After 6 months the subjects' symptoms are studied and compared.
Q: Identify a problem with this experiment and suggest a way to improve it.
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Chapter 8 Solutions
Research Methods for the Behavioral Sciences (MindTap Course List)
Ch. 8.1 - Describe, compare, and contrast the defining...Ch. 8.1 - Explain the general advantages and disadvantages...Ch. 8.2 - Define individual differences and explain how...Ch. 8.3 - Identify the three primary techniques for limiting...Ch. 8.4 - Describe how individual differences influence...Ch. 8.4 - Identify the options for reducing or controlling...Ch. 8.5 - Describe how differential attrition and...Ch. 8.6 - Describe how between-subjects designs are used to...Ch. 8 - In addition to the key words, you should also be...Ch. 8 - At the beginning of this chapter (p. 186) we...
Ch. 8 - In a between-subjects design, each individual...Ch. 8 - A researcher has a sample of 30 rats that are all...Ch. 8 - Briefly explain how a participant characteristic,...Ch. 8 - Explain the advantages and disadvantages of using...Ch. 8 - A recent survey at a major corporation found that...Ch. 8 - Describe how individual differences can produce...Ch. 8 - Explain how holding a participant variable such as...Ch. 8 - Describe some of the problems that can arise when...Ch. 8 - Describe the advantages of a two-group design...Ch. 8 - Identify the advantages of a multiple-group design...
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