In a study testing the effects of exercise on depression, researchers have a group of patients participate in an exercise program while a group of students does not. Later, the patients stop the program while the students begin it. If the patients' depression scores increase after they stop exercising, what does this specific result help the researchers understand?
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Research Methods in Psychology - 4th American Edition @ KPU
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Arrange the procedural steps of a switching replication with treatment removal design in the correct chronological order.
In a study testing the effects of exercise on depression, researchers have a group of patients participate in an exercise program while a group of students does not. Later, the patients stop the program while the students begin it. If the patients' depression scores increase after they stop exercising, what does this specific result help the researchers understand?
In a study testing an exercise intervention for depression using a switching replication with treatment removal design, match each group and phase with the expected outcome assuming the intervention is effective.
A researcher evaluates the results of a study using a switching replication with treatment removal design to test an exercise intervention for depression. They conclude that the evidence for the intervention's effectiveness is scientifically most robust if the first group maintains their improved mood even after they stop exercising, as this demonstrates the long-term stability of the treatment.
A research team is designing a study to test if a new 'sleep-hygiene' protocol improves daytime alertness in two separate hospital wards. They must construct a design that demonstrates the protocol is the direct cause of any improvement by showing that alertness levels improve only when the protocol is active, return to baseline when it is removed, and improve in a second group when it is subsequently introduced. Which of the following plans correctly synthesizes these requirements into a functional experimental protocol?
In the illustrative example of a switching replication with treatment removal design, the depressed patients' depression levels are expected to increase after the exercise program is removed from their routine.
In a study testing the effects of an exercise intervention on depression using two nonequivalent groups (depressed patients and depressed students), researchers implement a design where the treatment is switched between groups and removed. Arrange the events of this study in the correct chronological order from first to last.
In a switching replication with treatment removal design, Group A's symptoms return to baseline after the treatment ends, while Group B's symptoms simultaneously improve as they begin that treatment. This pattern allows researchers to rule out _____ because a coincidental external event would likely affect both groups in the same direction at the same time.
In the exercise-and-depression switching replication with treatment removal study, match each observation to the specific inferential function it serves in supporting a causal conclusion.
A research methods instructor asks students to judge the causal evidence produced by the exercise-and-depression switching replication with treatment removal study. The full dataset shows: patients' depression decreased in Phase 1 (when patients exercised and students did not); patients' depression increased in Phase 2 (after they stopped exercising); and students' depression decreased in Phase 2 (after they started exercising). Applying the design's evaluative criteria, a student should judge the overall causal evidence as _____, because every expected pattern was observed — including the critical reversal in the patient group that rules out alternative explanations such as maturation or spontaneous recovery.
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.
Explain the purpose of the treatment removal phase for the patient group in this design. How does the expected change in their depression levels after treatment removal help researchers demonstrate that the exercise intervention is the actual cause of the changes in depression?
In the exercise study, a researcher is transitioning from the first treatment phase to the switching replication phase. What specific actions must the researcher take regarding the daily routines of both the patient group and the student group to implement the 'switching replication with treatment removal' design?