Promises and Perils of Experimentation: The Mutual-Internal-Validity Problem

  title={Promises and Perils of Experimentation: The Mutual-Internal-Validity Problem},
  author={Hause Lin and Kaitlyn M. Werner and Michael Inzlicht},
  journal={Perspectives on Psychological Science},
  pages={854 - 863}
Researchers run experiments to test theories, search for and document phenomena, develop theories, or advise policymakers. When testing theories, experiments must be internally valid but do not have to be externally valid. However, when experiments are used to search for and document phenomena, develop theories, or advise policymakers, external validity matters. Conflating these goals and failing to recognize their tensions with validity concerns can lead to problems with theorizing… 

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