Research Methods for the Behavioral Sciences (MindTap Course List)
6th Edition
ISBN: 9781337613316
Author: Frederick J Gravetter, Lori-Ann B. Forzano
Publisher: Cengage Learning
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Textbook Question
Chapter 9, Problem 4E
For a within-subjects experiment that includes a time delay between treatment conditions, explain the possible advantages and the disadvantages of increasing the time delay between one treatment and the next.
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What are the requirements for an experiment to be able to show that changes in one variable cause changes in another?
Suppose we take a sample of 2,500 blood donors from a population for which 50% (0.5) have type O+ blood.
(a)
Into what range of possible values should the sample proportion fall 95% of the time, according to the Empirical Rule?
to
(b)
If the sample included only 625 donors instead of 2,500, would the range of possible sample proportions be wider, more narrow, or the same as with a sample of 2,500 donors? Explain your answer, and explain why it makes intuitive sense.
The range would be with 625 donors compared to a sample of 2,500 donors since the standard deviation of the sampling distribution would be . This makes intuitive sense because if fewer donors are included in the sample, the proportion will be reliable as an estimate of the proportion.
The dose-response effect is best described as
When the value of the response variable changes in a meaningful way with the dosage of the suspected cause
when similar studies produce similar results
when all other possible causes are ruled out
when the suspected precedes the response variable
Chapter 9 Solutions
Research Methods for the Behavioral Sciences (MindTap Course List)
Ch. 9.1 - Describe the general characteristics of a...Ch. 9.1 - Describe how time-related factors such as history,...Ch. 9.2 - For a within-subjects experiment, explain how the...Ch. 9.2 - Define counterbalancing and explain how it is used...Ch. 9.2 - Describe the limitations of counterbalancing and...Ch. 9.3 - Explain the general advantages and disadvantages...Ch. 9.3 - Define a matched-subject design and explain how it...Ch. 9.4 - Describe the different ways that within-subjects...Ch. 9 - In addition to the key words, you should also be...Ch. 9 - Describe the characteristics of a within-subjects...
Ch. 9 - Time-related factors and order effects can...Ch. 9 - For a within-subjects experiment that includes a...Ch. 9 - Under what circumstances is it advisable to switch...Ch. 9 - Describe the circumstances in which...Ch. 9 - Explain why partial counterbalancing is sometimes...Ch. 9 - Describe the problems that can be caused by...Ch. 9 - A researcher has a sample of 30 rats that are all...Ch. 9 - Explain how a matched-subjects design attempts to...Ch. 9 - Describe the disadvantages of a multiple-treatment...Ch. 9 - At the beginning of this chapter, we described a...
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