UM: Smartphones
The New York Times, in an article about the growing popularity of smartphones like Blackberries and iPhones, quotes UM psychology professor David Meyer, who comments about how smartphones are changing social expectations: “The social norm is that you should respond within a couple of hours, if not immediately. If you don’t, it is assumed you are out to lunch mentally, out of it socially, or don’t like the person who sent the e-mail.” [Source]