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Questions and Answers
What is the main characteristic of experiments in epidemiological studies?
What is the main characteristic of experiments in epidemiological studies?
- Investigator control over study circumstances (correct)
- Limited evidence for causation
- Lack of investigator control
- Inability to test research hypothesis
Which study design provides the strongest evidence for testing a research hypothesis?
Which study design provides the strongest evidence for testing a research hypothesis?
- Experimental study (correct)
- Natural experiment
- Observational study
- Case-control study
What is the gold standard of evidence for cause-and-effect relationships in medical research?
What is the gold standard of evidence for cause-and-effect relationships in medical research?
- Randomized controlled trial (correct)
- Observational study
- Clinical trial
- Natural experiment
What is the primary purpose of a clinical trial in medical research?
What is the primary purpose of a clinical trial in medical research?
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Why are experiments rarely possible in human studies?
Why are experiments rarely possible in human studies?
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