Bruner and revuski's research with high school students pressing telegraph keys showed that

Their research shows that: people can easily develop superstitious behaviors without even being aware of it

In the experiments, the students were given 5 cent if they pressed correct number of key from 4 buttons (the only button that matter is number 3)

But instead just pressing the one correct number, the students keep pressing all buttons because they develop superstition that pressing all buttons are necessary.