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Based on the concept of evaluating a body of research, explain why the researcher's suggestion to wait for a single flawless experiment is not the preferred scientific approach. How should the psychologists utilize the existing ten studies to draw a meaningful conclusion?
Case context: A group of psychologists wants to evaluate the effectiveness of a new learning technique. They find ten different studies on the topic. Each study has minor methodological limitations, such as small sample sizes or specific demographic constraints. One researcher suggests they ignore all ten studies and instead design a new, massive, and flawless experiment to test the technique.
Question: Based on the concept of evaluating a body of research, explain why the researcher's suggestion to wait for a single flawless experiment is not the preferred scientific approach. How should the psychologists utilize the existing ten studies to draw a meaningful conclusion?
Sample answer: The researcher's suggestion to wait for a single flawless experiment is not preferred because scientists evaluate theories by looking at overall trends across a body of research, not by waiting for a perfect experiment. The psychologists should assess the ten studies collectively. Even though each study is partially flawed, evaluating the overall trends across this body of research will allow them to reach a more meaningful conclusion than they could from a single study.
Key points:
- Scientists evaluate theories by looking at overall trends across a body of research rather than a single perfect experiment.
- Individual studies are expected to be partially flawed, yet they are still valuable when evaluated collectively.
- Assessing a large number of partially flawed studies allows researchers to reach more meaningful conclusions.
Rubric: To receive full credit, the response must explain that waiting for a single perfect/flawless experiment is not the standard scientific approach (1 point), state that the psychologists should look at the overall trends across the ten studies collectively (1 point), and describe how assessing multiple partially flawed studies leads to a more meaningful conclusion (1 point).
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Research Methods in Psychology - 4th American Edition @ KPU
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