History Bookmarks People Window Help ? ? (y complete: Chapter 11 Probler : MindT
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History Bookmarks People Window Help ? ? (y complete: Chapter 11 Probler : MindTap-Cengage Learning × ? ? secure https://ng.cengage.com/static/nb/ui/evo/index.htmi?deploymentide5687072000500e ?, MINDTAP Frum Cengage Complete: Chapter 11 Problem Set A graduate student is interested in whether viewing different types of scenes affects working memory. She has participants complete a series of working memory tests before and after walking in an urban setting. The first time the graduate student conducted this study, she used a repeated-measures design and compared the adults' baseline scores with their scores after the walk. However, her results were criticized because some argued that the observed changes in scores could have been attributed to practice-as they took the memory test twice- rather than being attributed to any effect of the walk Which of the following are better designs for investigating whether viewing different types of scenes affects working memory? Check all that apply The repeated-measures design, skipping the baseline test: The graduate student could use a repeated-measures design as she did originaly, but have the study participants skip the baseline test and use only the results of the test after the walk. The independent-measures The graduate student could assign those with the lowest baseline scores to take the walk in an urban setting and have the rest serve as a control group. Both groups would still complete a test of working memory twice, but only those not in the control group would take the walk in an urban setting. She could then use the independent-measures t test to compare the scores from the two groups The matched-subjects design: The graduate student could use the baselilne scores to match each person to another with a similar score. Then she could randomly assign one person in each pair to take the walk in an urban setting and the other person to serve as a control. Everyone would still complete a test of working memory twice, but only those not assignied as controls would take the walk in an urban setting. She could then use a repeated-measures t test comparing the difference in the final scores between the member of the pair who took the walk in an urban setting and the member who did not. design with assignment by baseline scores to the control and treatment groups: dent-measures design with random assignment to the control and treatment groupsy The graduate student could randomly assign half of her sample to take the walk in an urban setting and half to serve as a Ived: Repeated Measures Experiments Measure The Same https:/www.chegg.com/...repeated-measures-experiments-measure-set-research-partic... same set of research participants two or more times, while matched-subjects ex... Aa Aa 1 Repeated-measures and matched-subjects experiments Repeated..Explanation / Answer
The option, “The independent-measures design with assignment by baseline scores to the control and treatment groups: The graduate student could assign those with the lowest baseline scores to take the walk in an urban setting and have the rest serve as a control group. Both groups would still complete a test of working memory twice, but only those not in the control group would take the walk in an urban setting. He could then use the independent-measures t-test to compare the scores from the two groups” is wrong. Because in the independent-measures design, same participant cannot assign to more than one treatment.
The option, “The matched-subjects design: The graduate student could use the baseline scores to match each person to another with a similar score. Then he could randomly assign one person in each pair to take the walk in an urban setting and the other person to serve as a control. Everyone would still complete a test of working memory twice, but only those not assigned as controls would take the walk in an urban setting. He could then use a repeated-measures t-test comparing the difference in the final scores between the member of the pair who took the walk in an urban setting and the member who did not” is correct. Because the participants of the baseline scores can be matched with the alike group of scores in case of matched-subjects design and then the treatment is applied to the subjects.
The option, “The independent-measures design with random assignment to the control and treatment groups: The graduate student could randomly assign half of his sample to take the walk in an urban setting and half to serve as a control group. He could use an independent measures t-test to compare scores from the test of working memory administered to both groups after the treatment group took the walk in an urban setting” is wrong. Because the participants of the study are divided into two groups, such as control and treatment group and one participant is not get two treatments at a time.
Answer
The better design for the study is “The matched-subjects design: The graduate student could use the baseline scores to match each person to another with a similar score. Then he could randomly assign one person in each pair to take the walk in an urban setting and the other person to serve as a control. Everyone would still complete a test of working memory twice, but only those not assigned as controls would take the walk in an urban setting. He could then use a repeated-measures t-test comparing the difference in the final scores between the member of the pair who took the walk in an urban setting and the member who did not”.
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