Do Superstitions Work?

A postcard illustrating a variety of good luck charms. Think about the last time you avoided walking under a ladder. Or jumped over a crack so you didn’t step on it (and break your poor mother’s back). Or maybe you wore your lucky sweater on the day of a big presentation. And I’m guessing you probably say, “Bless you!” when someone sneezes (supposedly it keeps demons from taking up residence in…