State the three phases of measurement in a switching replication with treatment removal design using the example of the exercise intervention study. Describe which group receives the intervention and when, as well as the expected outcomes at each measurement point.
Question: State the three phases of measurement in a switching replication with treatment removal design using the example of the exercise intervention study. Describe which group receives the intervention and when, as well as the expected outcomes at each measurement point.
Sample answer: At baseline, depression is measured for both the depressed patients and depressed students. In the first phase, patients receive the exercise intervention while students do not, resulting in decreased depression only in the patient group. In the critical next phase, the exercise intervention is removed from the patient group and applied to the student group. The final measurement should show that students' depression levels decreased, while patients' depression levels increased.
Key points:
- Baseline measurement of depression for both patients and students
- First treatment phase where patients exercise and students serve as the control group
- Treatment removal for patients and treatment introduction for students in the second phase
- Expected outcome of decreased depression for students and increased depression for patients at final measurement
Rubric: Score response based on: 1. Identification of baseline measurement. 2. Correct description of first phase where patients exercise and students do not (showing decreased depression in patients). 3. Correct description of switching/removal phase where patients stop exercising and students start exercising (showing increased depression in patients and decreased depression in students).
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Research Methods in Psychology - 4th American Edition @ KPU
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