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Hawthorne Effect - Wikipedia
Social psychologists have known for decades that people are motivated to work harder when others are watching. When they are observed, people run faster, are more creative, and think harder about problems.
Rohit • Our love of authenticity rises as all the world became a stage
The Hawthorne Effect The act of observing a thing changes that thing. When people know they’re being observed, they may be more motivated to complete the action. Or, knowing that you’re looking for usability problems, they may be more motivated to find problems whether or not they’re actually important.
Chris Goward • You Should Test That: Conversion Optimization for More Leads, Sales and Profit or The Art and Science of Optimized Marketing
The act of measurement changes the behavior of the thing being measured.