The Barnum Effect And The Forer Effect

The Barnum effect is also called the Forer effect. Bertram Forer used a fake psychology test on his students then gave them supposedly individualised results a week later. He asked them to rate how well it applied to them. The students rated the accuracy of the statements at an average of 4.3 out of 5.

The problem was that Forer used various bits of copy he had found in a newsstand astrology book for the fake results and that all students received the exact same list of observations.