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LEARNING OBJECTIVES
- Explain what an experiment is and recognize examples of studies that are experiments and studies that are not experiments.
- Explain what internal validity is and why experiments are considered to be high in internal validity.
- Explain what external validity is and evaluate studies in terms of their external validity.
- Distinguish between the manipulation of the independent variable and control of extraneous variables and explain the importance of each.
- Recognize examples of confounding variables and explain how they affect the internal validity of a study.
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