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 10.2, Problem 5LO
Explain how a simple modification of the posttest-only nonequivalent control group design increases internal validity and produces a quasi-experimental design.
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Chapter 10 Solutions
Research Methods for the Behavioral Sciences (MindTap Course List)
Ch. 10.1 - Define, compare, and contrast the experimental,...Ch. 10.2 - Define a nonequivalent group design and identify...Ch. 10.2 - Explain how individual differences threaten the...Ch. 10.2 - Describe the two nonexperimental nonequivalent...Ch. 10.2 - Explain how a simple modification of the...Ch. 10.3 - Define a pre-post design and identify examples of...Ch. 10.3 - Identify the threats to internal validity for...Ch. 10.3 - Describe the nonexpenmental pretest-posttest...Ch. 10.3 - Explain how replacing the single observation...Ch. 10.4 - Define cross-sectional and longitudinal designs,...
Ch. 10.5 - Identify the statistical techniques that are...Ch. 10.5 - Explain how the terms quasi-independent variable...Ch. 10 - In addition to the key words, you should also be...Ch. 10 - Explain the distinction between experimental and...Ch. 10 - Why are studies that examine the effects of aging...Ch. 10 - Explain why we can be more confident about causal...Ch. 10 - Give an example of a situation (aside from gender)...Ch. 10 - Mueller and Oppenheimer (2014) conducted a series...Ch. 10 - A researcher measures personality characteristics...Ch. 10 - A researcher wants to describe the effectiveness...Ch. 10 - Explain how the pretest helps minimize the threat...Ch. 10 - Describe the basic characteristics of a pre-post...Ch. 10 - To evaluate the effectiveness of a new television...Ch. 10 - What characteristic differentiates a pretest-post...Ch. 10 - Explain how a time-series design minimizes most...Ch. 10 - A researcher wants to describe how fine motor...Ch. 10 - Although the cohort effect can be a serious...Ch. 10 - Identify the appropriate statistical test for each...Ch. 10 - The college offers all students an optional...
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- Describe the difference between a completely randomized design, a randomized block design, and a factorial experiment, and describe a situation in which each type of experiment would be utilized.arrow_forwardWhat are the assumptions for using a two-sample independent t-test?arrow_forwardExplain In what sense does a two-factor ANOVA use observations more efficiently than one- factor ANOVA does?arrow_forward
- . A researcher is using a one-way ANOVA to see whether a significant difference can be found between 3 types of teaching methods in students’ success. How would you phrase the null hypothesis? How would you phrase the alternative hypothesis?arrow_forwardSuppose that your agency has been evaluating an intervention using a posttest-only control group design. There were 155 people in the treatment group and 140 in the control group. The outcome variable is dichotomous. What statistical test would be most appropriate for testing the null hypothesis of no intervention effect?arrow_forwardIn a recent year, the SF Giants won 47 of 81 home games and they won 37 of 81 away games. Use a 0.05 significance level to test the claim that the proportion of wins for home games is greater than the proportion of wins for away games. Does there appear to be a home-field advantage?arrow_forward
- When might we want to test a non-directional (two-tailed) hypothesis, as opposed to a one-tailed hypothesis? How many different conditions are seen in a paired-samples T-test design?arrow_forwardAn exercise science major is planning to investigate the hypothesis that diet plus exercise is more effective for weight loss than either diet or exercise alone. She will randomly assign participants to four different conditions based on diet (hi/lo cal) and high/low exercise level. Analysis: ? Ho: ?arrow_forwardA researcher compares differences in positivity between participents in a low, middle, or upper middel class family. If she observes 15 participents in each group. Then what are the degrees of freedom for the one-way between-subjects ANOVA?arrow_forward
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