Insert Table Chart Text Shape Media Comment Scenario 3: A study was conducted to
ID: 3056822 • Letter: I
Question
Insert Table Chart Text Shape Media Comment Scenario 3: A study was conducted to assess physiological responses to an early passive exercise protocol to prevent muscle weakness in adults receiving mechanical ventilation. After 72 hours of intubation, patients had 20 minutes of leg movement delivered by a continuous passive motion machine. The Behavioral Pain Scale was used to measure patients' comfort at several time points: baseline, 5 minutes after the start of the intervention, 10 minutes after the start, 20 minutes after the start, and 60 minutes after the completion of the intervention. The researchers wish to test if there is a difference in pain scores over time. SPSS output for the analysis is provided below. Use it to answer the following questions. a. Identify the independent and dependent variables for this study. (2 pts.) Independent: The independent variable here will be the number of minutes spent on the continuous passive motion machine. Dependent: The dependent variable here will be the Behavioral Pain Scale scores of the patients. b. Why is a repeated measures ANOVA the appropriate analysis for this data? (2 pts.) This example is a repeated measure because the Behavioral Pain Scale is being measured at several points: baseline, 5 minutes after the start of the intervention, 10 minutes after the start, 20 minutes after the start, and 60 minutes after the completion of the intervention. c. State the null and alternative hypotheses for this study. (2 pts.)Explanation / Answer
Null hypothesis: Means of Behavioral Pain scale scores measured 5 minutes after the start of the intervention, 10 minutes after the start, 20 minutes after the start and 60 minutes after the completion of the intervention are all the same.
Alternate Hypo: Atleast two means out of 4, are significantly different.