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# Screen Shot 2019-01-27 at 5.31.54 PM.png - In a scientiﬁc...

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Unformatted text preview: In a scientiﬁc research article, the section that contains a brief summary of the other sections is the Selected Answer: 0 e. Abstract Correct Answer: 0 e. Abstract an 17 1 out of1 points Dr.john Jones purchases a group of adult rats from a supplier. He measures the maximal oxygen uptake (VOZmax) of each rat at the beginning of the study. He keeps the rats inactive in their cages for 6 weeks, and then measures the VOZmax of each rat again. He then subjects all the rats to a 6-week treadmill training program and measures the VOZmax again at the conclusion of the training. The rats are then kept inactive in their cages for a final 6 weeks, after which he measures the VOZmax for the 4th and ﬁnal time. The hypothesis was that the VOZmax would be unchanged after the ﬁrst inactive period, would increase after 6 weeks of training, and decrease after 6 weeks of detraining. Selected Answer: 0 b. longitudinal Correct Answer: 0 b. longitudinal Response This is an example of a lo_ngitudinal study because there is only one group, each rat serves as its own control, and Feedback: identical measurements are made repeatedly on each rat after different treatments. Incidentally, the type of statistical approach used in this study would be called &quot;repeated measures&quot;. A longitudinal study with repeated measures is a strong design, particularly when the number of subjects is limited, because it circumvents the problem of individual differences between subjects. Unlike a cross-sectional study where the treatment groups consist of different individuals with different characteristics, in a longitudinal study each subject is measured under each of the different experimental conditions. Therefore, the control condition is studied on the same subject as the experimental condition, eliminationg the limitation of individual differences. Can you think of any potential limitations or weaknesses of a longitudinal study? an 18 1 out of1 points Research scientists should report all conﬂicts of interest. Selected Answer: 0 True Correct Answer: 0 True ...
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• Spring '17
• Antony Scalia
• Longitudinal study, Repeated measures design, Cross-sectional study, Dr.john Jones, VOZmax

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