The Hawthorne Effect

Overcoming Bias: The Hawthorne Effect: "If you took a psychology class in college, you may have run across the so-called “Hawthorne Effect,” which is discussed in many college textbooks (see page 31 of this extensive survey from 2004) and is still cited in various studies. But the original studies that gave the “Hawthorne Effect” its name have long been discredited, and textbooks don’t always give you the full details."