AMDM Survey Vs. Observational Study Vs. Experiment

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What is an Observational Study?

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An Observational Study is a research method where the researcher observes subjects in their natural environment without manipulating any variables. It aims to identify correlations or patterns.

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What is an Experiment?

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An Experiment is a research method where the researcher manipulates one or more variables to determine their effect on a dependent variable, allowing for cause-and-effect conclusions.

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What is a Survey?

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A Survey is a research method that involves asking participants questions to gather data on their opinions, behaviors, or characteristics.

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Example of an Observational Study: A researcher observes car colors and seatbelt usage.

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This study does not involve manipulation; it simply records what is happening.

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Example of an Experiment: A study comparing the effects of two different dosages of medication on cancer spread in rats.

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This involves manipulation of the dosage to observe its effect.

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What is the main difference between an Observational Study and an Experiment?

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The main difference is that an Observational Study does not involve manipulation of variables, while an Experiment does.

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Why are Observational Studies useful?

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They are useful for identifying trends and correlations in real-world settings without interference.

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What is a key limitation of Observational Studies?

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They cannot establish cause-and-effect relationships due to the lack of manipulation.

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What is a key advantage of Experiments?

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Experiments can establish cause-and-effect relationships by controlling variables.

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What is a placebo in an Experiment?

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A placebo is a substance with no therapeutic effect used as a control in testing new drugs.