Answer:
The Hawthorne effect (or the observer effect)
Step-by-step explanation:
When we use the term Hawthorne effect, it refers to an study where employees productivity increases due to the fact that they are being observed.
It was determined decades ago by Elton Mayo, that employees' productivity changes just by the fact that they are being observed. That is why every time this type of experiment is repeated and the outcome is similar, we call it the Hawthorne effect.