Do you knock on wood to prevent bad luck? If so, you’re not alone! Superstitions have been a part of human life for centuries.
Donald Saucier is a psychologist at Kansas State University. He studies superstitions and the reasons people might believe them.
“Many superstitions come from ancient traditions that associated symbols—like animals, numbers, and shapes—with evil or protective properties,” says Saucier. “With superstitions, people believed they could better control what happened to them.”
Take Friday the 13th, for example. This supposedly unlucky date is a relatively new superstition that developed from two older ones.
The number 13 was considered unlucky in Norse, Mayan, and Christian traditions, explains Saucier. Even today, many tall buildings don’t list a “13th” floor. Fridays have been considered unlucky since medieval times. The two superstitions blended into Friday the 13th sometime in the 1800s.