RESEARCH METHODS FOR BEHAVIORAL...
6th Edition
ISBN: 2819280099110
Author: GRAVETTER
Publisher: CENGAGE L
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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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A researcher notes that there seems to be a difference in the prevalence of individuals who are insured and have high levels of education along with a high socioeconimic status and the prevalence of individuals who are uninsured and have low levels of education along a low socioecnonomic status. Use the appropriate hypothesis to test for independence of two independent variables presented here at the 5% significance level to ensure confounding has not influenced the study’s results. Then interpret your response.
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Multiple Choice
The chi-square value of 6.437 is higher than the chi-square…
Chapter 10 Solutions
RESEARCH METHODS FOR BEHAVIORAL...
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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- The Human Resources Department is studying absenteeism with employees. They have noticed an unacceptable level of absenteeism that is believed to be related to the general health of the employees. Twelve months ago, a fitness program for employees was started at the company. To evaluate the program, a random sample of eight participants were studied before the fitness program began and the same eight participants were studied twelve months later. The Human Resources Department believes the number of absences should change over the twelve months. Before After Difference Employee 1. What is dbar? 2. What is tcrit? 3. What is at? 4. What is pvalue? 1 5. What is decision? 6 5 2 6 2 four decimal places four decimal places 3 four decimal places 7 1 4 At the 5% significance level, answer the following questions using the following information: Ho: mu d = 0 Ha: mud #0 7 3 5 4 3 6 3 6 7 5 3 8 6 7 standard deviation of sample = 2.92arrow_forwardA clinical psychologist wanted to examine the relative effectiveness of cognitive-behavioral therapy (CBT) and behavioral therapy (BT) for depression. A sample of 20 depression patients were randomly selected and assigned to either of the two therapy methods. The data below presents the effectiveness rated by independent judges. Test whether one method is better than the other at .05 significance level (non-directional) by answering the following questions? CBT: 4, 8, 5, 7, 6, 9, 8, 6, 7, 8 BT: 3, 5, 4, 8, 6, 2, 4, 6, 5, 7 1) Present the hypotheses 2) Other than assumptions about sampling and normal distribution, what other assumptions are made for this test? 3) What are the df and the critical value for this test? 4) Provide Sum of squares (SS). Then, using the SS, compute the variance for the CBT. You MUST show the process of how you got the variance from SS (if you do NOT show a valid process, no credit is assigned) 5) Provide Sum of squares (SS). Then, using the SS, compute the…arrow_forwardA clinical psychologist wanted to examine the relative effectiveness of cognitive-behavioral therapy (CBT) and behavioral therapy (BT) for depression. A sample of 20 depression patients were randomly selected and assigned to either of the two therapy methods. The data below presents the effectiveness rated by independent judges. Test whether one method is better than the other at .05 significance level (non-directional) by answering the following questions? CBT: 4, 8, 5, 7, 6, 9, 8, 6, 7, 8 BT: 3, 5, 4, 8, 6, 2, 4, 6, 5, 7 Please use the seven step hypothesisarrow_forward
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