Examples of the experimenter effect

Promoting communication People think that helping people with serious communication difficulties to move their hands can enable them to express their ideas through keyboards. But in fact, these people with communication difficulties sometimes don't look at the keyboard at all, and the hand movements are just the behavior of the "healer".

The diviner thinks that he can explore minerals and water sources with the help of divining sticks without the help of scientific instruments. A study of 1948 tested the ability of 58 explorers to explore water sources, and none of them was more accurate than random selection.