What is the purpose of controlled experiments in scientific research?
Understand the Problem
The question is asking about the role and significance of controlled experiments within the context of scientific research. It prompts an understanding of the different options related to the purpose these experiments serve, particularly in comparison to other experimental designs.
Answer
Controlled experiments establish causation by manipulating an independent variable and controlling other factors.
Controlled experiments aim to establish causation by manipulating an independent variable and controlling all other factors. This ensures that observed results are not random and improves the internal validity of the experiment.
Answer for screen readers
Controlled experiments aim to establish causation by manipulating an independent variable and controlling all other factors. This ensures that observed results are not random and improves the internal validity of the experiment.
More Information
Controlled experiments help scientists isolate the effects of the independent variable, ensuring other variables don't affect the outcome. This eliminates 'noise', making it easier to identify true 'signals'.
Tips
A common mistake is not controlling all variables other than the independent variable, which can introduce confounding variables and compromise results.
Sources
- Controlled Experiments | School of Technology - tech.cam.ac.uk
- Controlled Experiment | Definition & Example - Lesson - Study.com - study.com
- Controlled experiments (article) - Khan Academy - khanacademy.org
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