Sometimes, it takes a single word — like "because" — to change someone's mind. That's according to Jonah Berger, a marketing professor at the Wharton School of the University of Pennsylvania who's ...

I tend to write about the latest research, but I think it's important to go back to "foundational" (i.e. old) research, too. This post describes research conducted by Ellen Langer at Harvard in 1978 ...