The fact that people will perform differently when being observed is known as the Hawthorne effect.

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The Hawthorne effect refers to the phenomenon where individuals modify their behavior in response to being observed or the awareness of being studied. This term is derived from a study that was conducted in the 1920s and 1930s at the Hawthorne Works factory near Chicago, where researchers found that employee productivity increased when workers were being observed.

The Fact That People Will Perform Differently When Being Observed