Observer Effect (Reactivity)
The Hawthorne effect (or observer effect) is a type of reactivity in which individuals modify or improve an aspect of their behavior in response to their awareness of being observed.
What Is the Hawthorne Effect?
Hawthorne effect - Wikipedia
The Hawthorne Effect and tips/strategies for how to apply it
The Hawthorne effect http://en.wikipedia.org/wiki/Hawthorne_effect
The Hawthorne effect refers to a phenomenon in which participants alter their behavior as a result of being part of an experiment or study.
Hawthorne effect - Wikipedia, the free encyclopedia